In the structure of the title compound, [Cd
2(C
4H
4NO
4S)
2(C
6H
7N)
2], the dinuclear Cd
II complex is located on a twofold axis with two Cd
2+ ions bridged by two oxide O atoms. Each Cd
2+ ion is additionally coordinated in an equatorial plane by two N and three O atoms of the acesulfamate ligands and axially by two N atoms of the 3-methylpyridine ligands, resulting in a distorted pentagonal bipyramidal coordination. We present here an example of a supramolecular assembly based on hydrogen bonds in a mixed-ligand metal complex; intermolecular C—H
O hydrogen bonds give rise to
R44(40) rings, which lead to one-dimensional chains.
Supporting information
CCDC reference: 763584
The [Cd(acs)2(H2O)4] complex was synthesized as reported earlier
(İçbudak et al., 2006). [Cd(acs)2(H2O)4] (0.5 mmol) was
dissolved in 50 ml of acetone and a solution of 3-methyl pyridine (1 mmol) in
50 ml of acetone was added to the stirred solution, vigorously stirred for 3 h
at 323 K and then cooled to ambient temperature. The resulting colourless
crystals were washed with an acetone-1,2-dichloroethane (1:1) mixture and
dried under vacuum (yield 92%).
All H atoms were positioned geometrically and refined with a riding model,
fixing the bond lengths at 0.93 and 0.96 Å for CH and CH3 groups,
respectively. The Uiso(H) values were constrained to be
1.2Ueq(parent) or 1.5Ueq(methyl C).
Data collection: X-AREA (Stoe & Cie, 2002); cell refinement: X-AREA (Stoe & Cie, 2002); data reduction: X-RED32 (Stoe & Cie, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Di-µ-acesulfamato-
κ3N,
O:
O;
κ3O:
N,
O-
bis[(acesulfamato-
κ2N,
O)bis(3-methylpyridine)cadmium(II)]
top
Crystal data top
[Cd2(C4H4NO4S)2(C6H7N)2] | F(000) = 2512 |
Mr = 1245.87 | Dx = 1.652 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 13627 reflections |
a = 14.9475 (12) Å | θ = 1.9–28.5° |
b = 16.5004 (11) Å | µ = 1.09 mm−1 |
c = 21.4067 (15) Å | T = 296 K |
β = 108.427 (6)° | Prism, colourless |
V = 5009.0 (7) Å3 | 0.47 × 0.43 × 0.28 mm |
Z = 4 | |
Data collection top
Stoe IPDS-2 diffractometer | 4901 independent reflections |
Radiation source: fine-focus sealed tube | 3749 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
ω scan rotation | θmax = 26.0°, θmin = 1.9° |
Absorption correction: integration (X-RED32; Stoe & Cie, 2002) | h = −18→18 |
Tmin = 0.637, Tmax = 0.763 | k = −20→20 |
13627 measured reflections | l = −26→26 |
Refinement top
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.032 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.072 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0356P)2 + 1.3644P] where P = (Fo2 + 2Fc2)/3 |
4901 reflections | (Δ/σ)max = 0.001 |
319 parameters | Δρmax = 0.50 e Å−3 |
0 restraints | Δρmin = −0.37 e Å−3 |
Crystal data top
[Cd2(C4H4NO4S)2(C6H7N)2] | V = 5009.0 (7) Å3 |
Mr = 1245.87 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 14.9475 (12) Å | µ = 1.09 mm−1 |
b = 16.5004 (11) Å | T = 296 K |
c = 21.4067 (15) Å | 0.47 × 0.43 × 0.28 mm |
β = 108.427 (6)° | |
Data collection top
Stoe IPDS-2 diffractometer | 4901 independent reflections |
Absorption correction: integration (X-RED32; Stoe & Cie, 2002) | 3749 reflections with I > 2σ(I) |
Tmin = 0.637, Tmax = 0.763 | Rint = 0.029 |
13627 measured reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.032 | 0 restraints |
wR(F2) = 0.072 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.50 e Å−3 |
4901 reflections | Δρmin = −0.37 e Å−3 |
319 parameters | |
Special details top
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell esds are taken
into account individually in the estimation of esds in distances, angles
and torsion angles; correlations between esds in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell esds is used for estimating esds involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor
wR and goodness of fit S are based on F2, conventional
R-factors R are based on F, with F set to zero for
negative F2. The threshold expression of F2 >
σ(F2) is used only for calculating R-factors(gt) etc.
and is not relevant to the choice of reflections for refinement.
R-factors based on F2 are statistically about twice as large
as those based on F, and R- factors based on ALL data will be
even larger. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
Cd1 | 0.622132 (15) | 0.377488 (13) | 0.227824 (9) | 0.04753 (8) | |
S1 | 0.62964 (7) | 0.38141 (6) | 0.04405 (4) | 0.0665 (2) | |
S2 | 0.80066 (5) | 0.38415 (6) | 0.39819 (4) | 0.0619 (2) | |
O1 | 0.5588 (2) | 0.3228 (2) | 0.01634 (14) | 0.0963 (9) | |
O2 | 0.6117 (2) | 0.46149 (18) | 0.02057 (15) | 0.1035 (10) | |
O3 | 0.71960 (18) | 0.35070 (16) | 0.02395 (12) | 0.0748 (7) | |
O4 | 0.77421 (18) | 0.39902 (15) | 0.21741 (11) | 0.0718 (7) | |
O5 | 0.54530 (15) | 0.37428 (14) | 0.31906 (10) | 0.0634 (5) | |
O6 | 0.8222 (2) | 0.46656 (19) | 0.40701 (14) | 0.1059 (10) | |
O7 | 0.8678 (2) | 0.3312 (3) | 0.38644 (16) | 0.1204 (12) | |
O8 | 0.79133 (18) | 0.35291 (19) | 0.46705 (11) | 0.0833 (8) | |
N1 | 0.61301 (17) | 0.23936 (15) | 0.21994 (11) | 0.0510 (6) | |
N2 | 0.60304 (19) | 0.51496 (16) | 0.22082 (12) | 0.0560 (6) | |
N3 | 0.6619 (2) | 0.37658 (17) | 0.12156 (13) | 0.0598 (6) | |
N4 | 0.69991 (17) | 0.37044 (17) | 0.34621 (10) | 0.0536 (6) | |
C1 | 0.6602 (2) | 0.1911 (2) | 0.26968 (15) | 0.0594 (8) | |
H1 | 0.6970 | 0.2146 | 0.3089 | 0.071* | |
C2 | 0.6562 (3) | 0.1081 (2) | 0.26484 (17) | 0.0720 (10) | |
H2 | 0.6903 | 0.0760 | 0.3000 | 0.086* | |
C3 | 0.6012 (3) | 0.0734 (2) | 0.20728 (17) | 0.0634 (8) | |
H3 | 0.5973 | 0.0173 | 0.2035 | 0.076* | |
C4 | 0.5518 (2) | 0.1209 (2) | 0.15539 (15) | 0.0549 (7) | |
C5 | 0.5605 (2) | 0.20393 (19) | 0.16434 (15) | 0.0547 (7) | |
H5 | 0.5277 | 0.2371 | 0.1295 | 0.066* | |
C6 | 0.4906 (3) | 0.0857 (2) | 0.09149 (18) | 0.0769 (10) | |
H6A | 0.4696 | 0.1283 | 0.0596 | 0.115* | |
H6B | 0.4369 | 0.0598 | 0.0982 | 0.115* | |
H6C | 0.5260 | 0.0467 | 0.0758 | 0.115* | |
C7 | 0.6357 (2) | 0.5595 (2) | 0.27548 (16) | 0.0602 (8) | |
H7 | 0.6602 | 0.5322 | 0.3153 | 0.072* | |
C8 | 0.6356 (3) | 0.6427 (2) | 0.27687 (19) | 0.0679 (10) | |
C9 | 0.5993 (3) | 0.6815 (2) | 0.2175 (2) | 0.0816 (12) | |
H9 | 0.5981 | 0.7378 | 0.2160 | 0.098* | |
C10 | 0.5650 (3) | 0.6380 (2) | 0.1608 (2) | 0.0799 (12) | |
H10 | 0.5403 | 0.6645 | 0.1207 | 0.096* | |
C11 | 0.5674 (3) | 0.5543 (2) | 0.16345 (17) | 0.0657 (9) | |
H11 | 0.5438 | 0.5247 | 0.1247 | 0.079* | |
C12 | 0.6761 (4) | 0.6856 (3) | 0.3418 (2) | 0.1045 (16) | |
H12A | 0.7281 | 0.7190 | 0.3404 | 0.157* | |
H12B | 0.6977 | 0.6463 | 0.3764 | 0.157* | |
H12C | 0.6284 | 0.7189 | 0.3500 | 0.157* | |
C13 | 0.7525 (3) | 0.39350 (17) | 0.15649 (17) | 0.0593 (8) | |
C14 | 0.8239 (3) | 0.3997 (2) | 0.12323 (17) | 0.0641 (9) | |
H14 | 0.8831 | 0.4203 | 0.1464 | 0.077* | |
C15 | 0.8074 (3) | 0.3772 (2) | 0.06145 (17) | 0.0635 (8) | |
C16 | 0.8769 (3) | 0.3719 (3) | 0.0247 (2) | 0.0859 (12) | |
H16A | 0.8783 | 0.3175 | 0.0091 | 0.129* | |
H16B | 0.9383 | 0.3865 | 0.0533 | 0.129* | |
H16C | 0.8587 | 0.4084 | −0.0122 | 0.129* | |
C17 | 0.6226 (2) | 0.37382 (17) | 0.36462 (12) | 0.0481 (6) | |
C18 | 0.6287 (2) | 0.3742 (2) | 0.43282 (14) | 0.0629 (8) | |
H18 | 0.5738 | 0.3814 | 0.4437 | 0.076* | |
C19 | 0.7090 (2) | 0.3647 (2) | 0.48068 (14) | 0.0576 (8) | |
C20 | 0.7229 (3) | 0.3606 (3) | 0.55236 (15) | 0.0898 (13) | |
H20A | 0.7449 | 0.4121 | 0.5722 | 0.135* | |
H20B | 0.7686 | 0.3195 | 0.5720 | 0.135* | |
H20C | 0.6641 | 0.3475 | 0.5592 | 0.135* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Cd1 | 0.05297 (12) | 0.04807 (12) | 0.04017 (10) | −0.00260 (11) | 0.01279 (8) | −0.00171 (10) |
S1 | 0.0704 (5) | 0.0736 (5) | 0.0619 (5) | 0.0096 (5) | 0.0299 (4) | 0.0004 (4) |
S2 | 0.0476 (4) | 0.0869 (6) | 0.0490 (4) | −0.0101 (4) | 0.0122 (3) | −0.0055 (4) |
O1 | 0.0815 (19) | 0.128 (3) | 0.0839 (18) | −0.0167 (18) | 0.0320 (15) | −0.0280 (17) |
O2 | 0.127 (3) | 0.092 (2) | 0.099 (2) | 0.0414 (19) | 0.0469 (19) | 0.0322 (17) |
O3 | 0.0742 (17) | 0.0911 (18) | 0.0696 (15) | 0.0036 (14) | 0.0375 (13) | −0.0122 (13) |
O4 | 0.0789 (16) | 0.0822 (18) | 0.0604 (13) | −0.0085 (13) | 0.0307 (12) | −0.0037 (11) |
O5 | 0.0485 (11) | 0.0794 (15) | 0.0508 (11) | −0.0045 (12) | −0.0004 (9) | 0.0005 (11) |
O6 | 0.106 (2) | 0.103 (2) | 0.090 (2) | −0.0534 (19) | 0.0047 (17) | −0.0039 (16) |
O7 | 0.0711 (19) | 0.190 (4) | 0.093 (2) | 0.040 (2) | 0.0157 (16) | −0.026 (2) |
O8 | 0.0612 (15) | 0.137 (2) | 0.0429 (11) | 0.0018 (15) | 0.0038 (10) | 0.0082 (13) |
N1 | 0.0521 (14) | 0.0530 (14) | 0.0459 (13) | 0.0015 (12) | 0.0128 (11) | −0.0016 (11) |
N2 | 0.0686 (18) | 0.0497 (14) | 0.0533 (15) | 0.0000 (12) | 0.0247 (13) | 0.0001 (11) |
N3 | 0.0667 (17) | 0.0595 (15) | 0.0617 (14) | 0.0012 (15) | 0.0322 (13) | −0.0001 (13) |
N4 | 0.0495 (14) | 0.0715 (16) | 0.0377 (11) | −0.0056 (13) | 0.0106 (10) | −0.0023 (11) |
C1 | 0.070 (2) | 0.063 (2) | 0.0423 (15) | 0.0071 (17) | 0.0126 (14) | −0.0004 (13) |
C2 | 0.098 (3) | 0.059 (2) | 0.0561 (18) | 0.013 (2) | 0.0190 (18) | 0.0087 (15) |
C3 | 0.074 (2) | 0.0507 (19) | 0.070 (2) | −0.0017 (17) | 0.0294 (18) | −0.0008 (15) |
C4 | 0.0470 (15) | 0.0581 (18) | 0.0607 (16) | −0.0012 (16) | 0.0187 (13) | −0.0078 (16) |
C5 | 0.0492 (17) | 0.0594 (19) | 0.0509 (16) | 0.0031 (14) | 0.0093 (13) | 0.0002 (14) |
C6 | 0.062 (2) | 0.080 (2) | 0.080 (2) | −0.0056 (19) | 0.0086 (18) | −0.021 (2) |
C7 | 0.073 (2) | 0.0533 (19) | 0.0590 (19) | −0.0075 (16) | 0.0282 (17) | −0.0031 (14) |
C8 | 0.080 (2) | 0.050 (2) | 0.089 (3) | −0.0096 (17) | 0.048 (2) | −0.0072 (17) |
C9 | 0.098 (3) | 0.053 (2) | 0.115 (3) | 0.006 (2) | 0.064 (3) | 0.010 (2) |
C10 | 0.095 (3) | 0.075 (3) | 0.087 (3) | 0.025 (2) | 0.053 (2) | 0.028 (2) |
C11 | 0.077 (2) | 0.072 (2) | 0.0546 (18) | 0.0091 (19) | 0.0300 (17) | 0.0059 (16) |
C12 | 0.123 (4) | 0.074 (3) | 0.123 (4) | −0.029 (3) | 0.048 (3) | −0.039 (3) |
C13 | 0.079 (2) | 0.0411 (17) | 0.070 (2) | −0.0029 (15) | 0.0411 (18) | 0.0027 (13) |
C14 | 0.068 (2) | 0.059 (2) | 0.073 (2) | −0.0083 (16) | 0.0328 (18) | 0.0018 (15) |
C15 | 0.072 (2) | 0.0541 (17) | 0.076 (2) | 0.0031 (18) | 0.0406 (18) | 0.0069 (18) |
C16 | 0.089 (3) | 0.095 (3) | 0.094 (3) | 0.005 (3) | 0.059 (2) | 0.003 (2) |
C17 | 0.0503 (15) | 0.0464 (15) | 0.0422 (13) | −0.0053 (15) | 0.0070 (12) | 0.0000 (13) |
C18 | 0.0560 (18) | 0.090 (2) | 0.0435 (14) | −0.0049 (19) | 0.0174 (13) | −0.0016 (17) |
C19 | 0.0642 (19) | 0.067 (2) | 0.0412 (14) | −0.0054 (16) | 0.0155 (13) | −0.0023 (14) |
C20 | 0.111 (3) | 0.117 (3) | 0.0387 (16) | −0.011 (3) | 0.0191 (18) | 0.0028 (19) |
Geometric parameters (Å, º) top
Cd1—N1 | 2.286 (3) | C4—C5 | 1.384 (4) |
Cd1—N2 | 2.285 (3) | C4—C6 | 1.501 (4) |
Cd1—N3 | 2.526 (2) | C5—H5 | 0.9300 |
Cd1—N4 | 2.434 (2) | C6—H6A | 0.9600 |
Cd1—O4 | 2.380 (3) | C6—H6B | 0.9600 |
Cd1—O5i | 2.384 (2) | C6—H6C | 0.9600 |
Cd1—O5 | 2.560 (2) | C7—C8 | 1.374 (5) |
S1—N3 | 1.577 (3) | C7—H7 | 0.9300 |
S2—N4 | 1.581 (2) | C8—C9 | 1.371 (5) |
S1—O1 | 1.418 (3) | C8—C12 | 1.506 (5) |
S1—O2 | 1.409 (3) | C9—C10 | 1.363 (6) |
S1—O3 | 1.617 (2) | C9—H9 | 0.9300 |
S2—O6 | 1.396 (3) | C10—C11 | 1.383 (5) |
S2—O7 | 1.412 (3) | C10—H10 | 0.9300 |
S2—O8 | 1.609 (2) | C11—H11 | 0.9300 |
O3—C15 | 1.376 (4) | C12—H12A | 0.9600 |
O4—C13 | 1.244 (4) | C12—H12B | 0.9600 |
O5—C17 | 1.254 (3) | C12—H12C | 0.9600 |
O5—Cd1i | 2.384 (2) | C13—C14 | 1.463 (5) |
O8—C19 | 1.366 (4) | C14—C15 | 1.320 (5) |
N1—C5 | 1.336 (4) | C14—H14 | 0.9300 |
N1—C1 | 1.338 (4) | C15—C16 | 1.491 (4) |
N2—C7 | 1.336 (4) | C16—H16A | 0.9600 |
N2—C11 | 1.342 (4) | C16—H16B | 0.9600 |
N3—C13 | 1.353 (4) | C16—H16C | 0.9600 |
N4—C17 | 1.335 (4) | C17—C18 | 1.433 (4) |
C1—C2 | 1.373 (5) | C18—C19 | 1.318 (4) |
C1—H1 | 0.9300 | C18—H18 | 0.9300 |
C2—C3 | 1.372 (5) | C19—C20 | 1.483 (4) |
C2—H2 | 0.9300 | C20—H20A | 0.9600 |
C3—C4 | 1.369 (5) | C20—H20B | 0.9600 |
C3—H3 | 0.9300 | C20—H20C | 0.9600 |
| | | |
N1—Cd1—N2 | 168.93 (8) | C5—C4—C6 | 120.8 (3) |
N1—Cd1—N3 | 87.31 (9) | N1—C5—C4 | 124.0 (3) |
N1—Cd1—N4 | 91.55 (9) | N1—C5—H5 | 118.0 |
N1—Cd1—O5 | 90.29 (8) | C4—C5—H5 | 118.0 |
N1—Cd1—O5i | 85.22 (8) | C4—C6—H6A | 109.5 |
N2—Cd1—N3 | 90.39 (9) | C4—C6—H6B | 109.5 |
N2—Cd1—N4 | 97.14 (9) | H6A—C6—H6B | 109.5 |
N2—Cd1—O5i | 84.36 (9) | C4—C6—H6C | 109.5 |
N2—Cd1—O5 | 89.64 (8) | H6A—C6—H6C | 109.5 |
N3—Cd1—O5 | 167.60 (8) | H6B—C6—H6C | 109.5 |
O4—Cd1—N4 | 87.06 (8) | N2—C7—C8 | 124.5 (3) |
O5i—Cd1—N3 | 97.76 (8) | N2—C7—H7 | 117.8 |
O5i—Cd1—O5 | 69.90 (7) | C8—C7—H7 | 117.8 |
O2—S1—O1 | 117.2 (2) | C9—C8—C7 | 116.7 (3) |
O6—S2—O7 | 118.7 (2) | C9—C8—C12 | 124.2 (4) |
C17—O5—Cd1 | 93.93 (18) | C7—C8—C12 | 119.1 (4) |
Cd1i—O5—Cd1 | 110.04 (7) | C10—C9—C8 | 120.4 (4) |
N2—Cd1—O4 | 87.07 (9) | C10—C9—H9 | 119.8 |
N1—Cd1—O4 | 100.27 (9) | C8—C9—H9 | 119.8 |
O4—Cd1—O5i | 150.51 (8) | C9—C10—C11 | 119.5 (4) |
O5i—Cd1—N4 | 121.97 (8) | C9—C10—H10 | 120.3 |
O4—Cd1—N3 | 54.07 (9) | C11—C10—H10 | 120.3 |
N4—Cd1—N3 | 140.03 (9) | N2—C11—C10 | 121.2 (3) |
O4—Cd1—O5 | 138.30 (7) | N2—C11—H11 | 119.4 |
N4—Cd1—O5 | 52.16 (7) | C10—C11—H11 | 119.4 |
O2—S1—N3 | 112.53 (18) | C8—C12—H12A | 109.5 |
O1—S1—N3 | 110.19 (17) | C8—C12—H12B | 109.5 |
O2—S1—O3 | 106.25 (17) | H12A—C12—H12B | 109.5 |
O1—S1—O3 | 104.39 (16) | C8—C12—H12C | 109.5 |
N3—S1—O3 | 105.14 (14) | H12A—C12—H12C | 109.5 |
O6—S2—N4 | 111.21 (17) | H12B—C12—H12C | 109.5 |
O7—S2—N4 | 111.04 (17) | O4—C13—N3 | 118.6 (3) |
O6—S2—O8 | 105.72 (17) | O4—C13—C14 | 121.1 (3) |
O7—S2—O8 | 103.75 (19) | N3—C13—C14 | 120.2 (3) |
N4—S2—O8 | 105.07 (13) | C15—C14—C13 | 122.2 (3) |
C15—O3—S1 | 117.7 (2) | C15—C14—H14 | 118.9 |
C13—O4—Cd1 | 98.4 (2) | C13—C14—H14 | 118.9 |
C17—O5—Cd1i | 156.0 (2) | C14—C15—O3 | 121.1 (3) |
C19—O8—S2 | 119.7 (2) | C14—C15—C16 | 127.2 (4) |
C5—N1—C1 | 117.5 (3) | O3—C15—C16 | 111.6 (3) |
C5—N1—Cd1 | 120.4 (2) | C15—C16—H16A | 109.5 |
C1—N1—Cd1 | 122.0 (2) | C15—C16—H16B | 109.5 |
C7—N2—C11 | 117.7 (3) | H16A—C16—H16B | 109.5 |
C7—N2—Cd1 | 119.0 (2) | C15—C16—H16C | 109.5 |
C11—N2—Cd1 | 123.1 (2) | H16A—C16—H16C | 109.5 |
C13—N3—S1 | 119.4 (2) | H16B—C16—H16C | 109.5 |
C13—N3—Cd1 | 88.88 (19) | O5—C17—N4 | 116.2 (2) |
S1—N3—Cd1 | 150.09 (16) | O5—C17—C18 | 122.6 (3) |
C17—N4—S2 | 120.50 (18) | N4—C17—C18 | 121.2 (2) |
C17—N4—Cd1 | 97.59 (16) | C19—C18—C17 | 122.8 (3) |
S2—N4—Cd1 | 139.58 (14) | C19—C18—H18 | 118.6 |
N1—C1—C2 | 122.3 (3) | C17—C18—H18 | 118.6 |
N1—C1—H1 | 118.9 | C18—C19—O8 | 120.7 (3) |
C2—C1—H1 | 118.9 | C18—C19—C20 | 127.2 (3) |
C3—C2—C1 | 118.9 (3) | O8—C19—C20 | 111.9 (3) |
C3—C2—H2 | 120.5 | C19—C20—H20A | 109.5 |
C1—C2—H2 | 120.5 | C19—C20—H20B | 109.5 |
C4—C3—C2 | 120.4 (3) | H20A—C20—H20B | 109.5 |
C4—C3—H3 | 119.8 | C19—C20—H20C | 109.5 |
C2—C3—H3 | 119.8 | H20A—C20—H20C | 109.5 |
C3—C4—C5 | 116.8 (3) | H20B—C20—H20C | 109.5 |
C3—C4—C6 | 122.4 (3) | | |
| | | |
O2—S1—O3—C15 | 77.7 (3) | O5—Cd1—N3—S1 | 13.5 (7) |
O1—S1—O3—C15 | −157.8 (3) | O6—S2—N4—C17 | −84.2 (3) |
N3—S1—O3—C15 | −41.8 (3) | O7—S2—N4—C17 | 141.2 (3) |
N2—Cd1—O4—C13 | −91.49 (19) | O8—S2—N4—C17 | 29.7 (3) |
N1—Cd1—O4—C13 | 80.16 (19) | O6—S2—N4—Cd1 | 73.9 (3) |
O5i—Cd1—O4—C13 | −18.4 (3) | O7—S2—N4—Cd1 | −60.6 (3) |
N4—Cd1—O4—C13 | 171.20 (19) | O8—S2—N4—Cd1 | −172.2 (2) |
N3—Cd1—O4—C13 | 1.13 (18) | N2—Cd1—N4—C17 | 81.80 (19) |
O5—Cd1—O4—C13 | −177.65 (17) | N1—Cd1—N4—C17 | −91.32 (19) |
N2—Cd1—O5—C17 | −97.06 (19) | O4—Cd1—N4—C17 | 168.47 (19) |
N1—Cd1—O5—C17 | 94.01 (19) | O5i—Cd1—N4—C17 | −6.0 (2) |
O4—Cd1—O5—C17 | −11.9 (2) | N3—Cd1—N4—C17 | −178.98 (17) |
O5i—Cd1—O5—C17 | 178.81 (15) | O5—Cd1—N4—C17 | −2.15 (16) |
N4—Cd1—O5—C17 | 2.28 (17) | N2—Cd1—N4—S2 | −79.3 (2) |
N3—Cd1—O5—C17 | 172.7 (4) | N1—Cd1—N4—S2 | 107.6 (2) |
N2—Cd1—O5—Cd1i | 81.42 (10) | O4—Cd1—N4—S2 | 7.3 (2) |
N1—Cd1—O5—Cd1i | −87.51 (10) | O5i—Cd1—N4—S2 | −167.1 (2) |
O4—Cd1—O5—Cd1i | 166.60 (9) | N3—Cd1—N4—S2 | 19.9 (3) |
O5i—Cd1—O5—Cd1i | −2.71 (12) | O5—Cd1—N4—S2 | −163.3 (3) |
N4—Cd1—O5—Cd1i | −179.24 (15) | C5—N1—C1—C2 | 0.3 (5) |
N3—Cd1—O5—Cd1i | −8.8 (5) | Cd1—N1—C1—C2 | −178.9 (3) |
O6—S2—O8—C19 | 81.9 (3) | N1—C1—C2—C3 | −0.7 (6) |
O7—S2—O8—C19 | −152.4 (3) | C1—C2—C3—C4 | 0.6 (6) |
N4—S2—O8—C19 | −35.8 (3) | C2—C3—C4—C5 | −0.1 (5) |
N2—Cd1—N1—C5 | 27.2 (6) | C2—C3—C4—C6 | −180.0 (4) |
O4—Cd1—N1—C5 | −103.7 (2) | C1—N1—C5—C4 | 0.3 (5) |
O5i—Cd1—N1—C5 | 47.0 (2) | Cd1—N1—C5—C4 | 179.5 (2) |
N4—Cd1—N1—C5 | 169.0 (2) | C3—C4—C5—N1 | −0.4 (5) |
N3—Cd1—N1—C5 | −51.0 (2) | C6—C4—C5—N1 | 179.5 (3) |
O5—Cd1—N1—C5 | 116.8 (2) | C11—N2—C7—C8 | −0.3 (5) |
N2—Cd1—N1—C1 | −153.6 (4) | Cd1—N2—C7—C8 | 174.3 (3) |
O4—Cd1—N1—C1 | 75.4 (3) | N2—C7—C8—C9 | −0.1 (6) |
O5i—Cd1—N1—C1 | −133.8 (3) | N2—C7—C8—C12 | −179.0 (3) |
N4—Cd1—N1—C1 | −11.9 (3) | C7—C8—C9—C10 | 0.3 (6) |
N3—Cd1—N1—C1 | 128.1 (3) | C12—C8—C9—C10 | 179.2 (4) |
O5—Cd1—N1—C1 | −64.0 (3) | C8—C9—C10—C11 | −0.2 (6) |
N1—Cd1—N2—C7 | 142.7 (4) | C7—N2—C11—C10 | 0.4 (5) |
O4—Cd1—N2—C7 | −85.3 (2) | Cd1—N2—C11—C10 | −173.9 (3) |
O5i—Cd1—N2—C7 | 122.9 (2) | C9—C10—C11—N2 | −0.2 (6) |
N4—Cd1—N2—C7 | 1.3 (3) | Cd1—O4—C13—N3 | −1.9 (3) |
N3—Cd1—N2—C7 | −139.3 (2) | Cd1—O4—C13—C14 | −177.9 (2) |
O5—Cd1—N2—C7 | 53.1 (2) | S1—N3—C13—O4 | 171.4 (2) |
N1—Cd1—N2—C11 | −42.9 (6) | Cd1—N3—C13—O4 | 1.8 (3) |
O4—Cd1—N2—C11 | 89.0 (3) | S1—N3—C13—C14 | −12.5 (4) |
O5i—Cd1—N2—C11 | −62.8 (3) | Cd1—N3—C13—C14 | 177.9 (3) |
N4—Cd1—N2—C11 | 175.6 (3) | O4—C13—C14—C15 | 165.1 (3) |
N3—Cd1—N2—C11 | 35.0 (3) | N3—C13—C14—C15 | −10.8 (5) |
O5—Cd1—N2—C11 | −132.6 (3) | C13—C14—C15—O3 | 3.7 (5) |
O2—S1—N3—C13 | −80.0 (3) | C13—C14—C15—C16 | −172.7 (3) |
O1—S1—N3—C13 | 147.1 (3) | S1—O3—C15—C14 | 24.9 (4) |
O3—S1—N3—C13 | 35.2 (3) | S1—O3—C15—C16 | −158.1 (3) |
O2—S1—N3—Cd1 | 78.8 (4) | Cd1i—O5—C17—N4 | 179.9 (4) |
O1—S1—N3—Cd1 | −54.0 (4) | Cd1—O5—C17—N4 | −3.7 (3) |
O3—S1—N3—Cd1 | −165.9 (3) | Cd1i—O5—C17—C18 | 1.8 (7) |
N2—Cd1—N3—C13 | 85.07 (19) | Cd1—O5—C17—C18 | 178.3 (3) |
N1—Cd1—N3—C13 | −105.77 (19) | S2—N4—C17—O5 | 169.8 (2) |
O4—Cd1—N3—C13 | −1.03 (16) | Cd1—N4—C17—O5 | 3.9 (3) |
O5i—Cd1—N3—C13 | 169.43 (18) | S2—N4—C17—C18 | −12.2 (4) |
N4—Cd1—N3—C13 | −16.6 (3) | Cd1—N4—C17—C18 | −178.1 (3) |
O5—Cd1—N3—C13 | 175.2 (3) | O5—C17—C18—C19 | 172.3 (3) |
N2—Cd1—N3—S1 | −76.6 (3) | N4—C17—C18—C19 | −5.6 (5) |
N1—Cd1—N3—S1 | 92.6 (3) | C17—C18—C19—O8 | −0.8 (6) |
O4—Cd1—N3—S1 | −162.7 (4) | C17—C18—C19—C20 | −177.2 (3) |
O5i—Cd1—N3—S1 | 7.8 (3) | S2—O8—C19—C18 | 23.9 (5) |
N4—Cd1—N3—S1 | −178.3 (3) | S2—O8—C19—C20 | −159.1 (3) |
Symmetry code: (i) −x+1, y, −z+1/2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C18—H18···O1i | 0.93 | 2.58 | 3.419 (4) | 150 |
C6—H6C···O6ii | 0.96 | 2.55 | 3.413 (5) | 150 |
Symmetry codes: (i) −x+1, y, −z+1/2; (ii) −x+3/2, y−1/2, −z+1/2. |
Experimental details
Crystal data |
Chemical formula | [Cd2(C4H4NO4S)2(C6H7N)2] |
Mr | 1245.87 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 296 |
a, b, c (Å) | 14.9475 (12), 16.5004 (11), 21.4067 (15) |
β (°) | 108.427 (6) |
V (Å3) | 5009.0 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.09 |
Crystal size (mm) | 0.47 × 0.43 × 0.28 |
|
Data collection |
Diffractometer | Stoe IPDS2 diffractometer |
Absorption correction | Integration (X-RED32; Stoe & Cie, 2002) |
Tmin, Tmax | 0.637, 0.763 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13627, 4901, 3749 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.617 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.072, 1.05 |
No. of reflections | 4901 |
No. of parameters | 319 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.50, −0.37 |
Selected geometric parameters (Å, º) topCd1—N1 | 2.286 (3) | S1—O1 | 1.418 (3) |
Cd1—N2 | 2.285 (3) | S1—O2 | 1.409 (3) |
Cd1—N3 | 2.526 (2) | S1—O3 | 1.617 (2) |
Cd1—N4 | 2.434 (2) | S2—O6 | 1.396 (3) |
Cd1—O4 | 2.380 (3) | S2—O7 | 1.412 (3) |
Cd1—O5i | 2.384 (2) | S2—O8 | 1.609 (2) |
Cd1—O5 | 2.560 (2) | O4—C13 | 1.244 (4) |
S1—N3 | 1.577 (3) | O5—C17 | 1.254 (3) |
S2—N4 | 1.581 (2) | | |
| | | |
N1—Cd1—N2 | 168.93 (8) | N3—Cd1—O5 | 167.60 (8) |
N1—Cd1—N3 | 87.31 (9) | O4—Cd1—N4 | 87.06 (8) |
N1—Cd1—N4 | 91.55 (9) | O5i—Cd1—N3 | 97.76 (8) |
N1—Cd1—O5 | 90.29 (8) | O5i—Cd1—O5 | 69.90 (7) |
N1—Cd1—O5i | 85.22 (8) | O2—S1—O1 | 117.2 (2) |
N2—Cd1—N3 | 90.39 (9) | O6—S2—O7 | 118.7 (2) |
N2—Cd1—N4 | 97.14 (9) | C17—O5—Cd1 | 93.93 (18) |
N2—Cd1—O5i | 84.36 (9) | Cd1i—O5—Cd1 | 110.04 (7) |
N2—Cd1—O5 | 89.64 (8) | | |
Symmetry code: (i) −x+1, y, −z+1/2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C18—H18···O1i | 0.93 | 2.58 | 3.419 (4) | 150 |
C6—H6C···O6ii | 0.96 | 2.55 | 3.413 (5) | 150 |
Symmetry codes: (i) −x+1, y, −z+1/2; (ii) −x+3/2, y−1/2, −z+1/2. |
Acesulfame (C4H5SO4N) is an oxathiazinone dioxide and is systematically named as 6-methyl-1,2,3-oxathiazin-4(3H)-one 2,2-dioxide; it is also known as 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide or acetosulfam. It was discovered by chemist Karl Clauss in 1967 (Clauss & Jensen, 1973) and has been widely used as a non-calorific artificial sweetener since 1988, after the FDA (US Food and Drug Administration) granted approval (Duffy & Anderson, 1998). Many countries have approved the use of acesulfame K, viz. the potassium salt of acesulfame, in soft drinks, candies, toothpastes, mouthwashes, cosmetics and pharmacological preparations (Mukherjee & Chakrabarti, 1997). The acesulfamate ion (acs-), C4H5NO4S-, has several potential donor atoms and thus, as a polyfunctional ligand, it can engage in N, OCO, OOSO or O coordination with different metal ions. In order to examine the coordination behaviour of acesulfame in metal complexes, the title complex, (I), has been synthesized and its crystal structure is presented here.
The ongoing research carried out in our laboratory on the coordination behaviour of the acesulfamato ligand in transition metal complexes has revealed that four different bonding patterns may exist: N-coordination through imino N (İçbudak, Bulut et al., 2005), O-coordination through carbonyl O (İçbudak et al., 2006), N, O-coordination through imino N and carbonyl O as a bidendate ligand (Bulut et al., 2005), and the acesulfamate ion remaining outside the coordination sphere when the secondary ligand has strong chelating properties (İçbudak, Heren et al., 2005). Compound (I) is the first complex containing the bridging acesulfamato ligand.
In complex (I), located on a twofold axis, one of the crystallographically independent acesulfamato ligands shows bidendate behaviour and coordinates to a CdII ion both through the imino N and the O atom of the carbonyl group. The other acesulfamato ligand behaves as a bridging ligand between two CdII ions via O atom of the carbonyl group and also coordinates to one of the CdII ions via the imino N (see scheme and Fig.1).
Both Cd2+ ions are coordinated by three O atoms and two N atoms of the acesulfamato ligands and two N atoms of the 3-methylpyridine ligands. Thus, four four-membered chelate rings (Cd1/N3/C13/O4, Cd1/N4/C17/O5 and their symmetry-related counterparts) are formed. Two of the O atoms of the acesulfamato ligands act as a µ2 bridge connecting two Cd2+ ions, thus forming a rhomboidal Cd2O2 ring. The Cd···Cdi [symmetry code: (i) 1 - x, y, 1/2 - z] distance is 4.0526 (5) Å, and the dihedral angles between the rhomboid ring and the four-membered chelate rings are 11.07 (4)° and 2.31 (1)°, respectively. Each Cd2+ ion is seven-coordinate, forming a distorted pentagonal bipyramid, with atoms N3, O4, N4, O5 and O5i forming the distorted pentagonal plane. The coordination number seven for CdII is rare because of increased ligand–ligand repulsion, weaker bonds and, usually, reduced crystal field stabilization in comparison with octahedral complexes. Coordination seven is most commonly found in discrete complexes of second- and third-row transition metals, such as lanthanides and actinides (Arndt et al., 2002; Han et al., 1999). The three known coordination geometries for seven-coordination are (i) pentagonal bipyramidal (Rodesiler et al., 1985), (ii) capped octahedral with a seventh ligand added to a rectangular face (Chen et al., 2008) and (iii) capped trigonal prismatic with a seventh ligand added to a rectangular face (Yeşilel et al., 2007). These geometries are considered to have approximately equal a priori probabilities (Park et al., 1970). The first coordination geometry, viz. (i), is observed in (I). The pentagonal bipyramidal coordination of the d3sp3-hybridized Cd2+ ion is seldom observed as an octahedral d2sp3 hybridization with six coordination bonds is usually preferred. The acesulfame rings adopt a half-chair conformation, as evidenced from the puckering parameters (Cremer & Pople, 1975): Q = 0.391 (3) Å, θ = 62.5 (4)° and ϕ = 12.2 (6)° for S1/O3/C15/C14/C13/N3 and Q = 0.319 (2) Å, θ = 58.3 (5)° and ϕ = 13.9 (6)° for S2/O8/C19/C18/C17/N4. The pyridine rings are planar (χ2 = 3.3 and 5.0, respectively), with maximum deviations from the least-squares planes of 0.004 (5) Å for atom C2 and 0.002 (3) Å for atom N2.
Crystal packing is achieved via intermolecular hydrogen bonding (Fig. 2 and Table 2). The intramolecular C18—H18···O1i hydrogen bond can be described as an S(8) ring in graph-set notation (Bernstein et al., 1995). Atom C6 acts as hydrogen-bond donor, via atom H6C, to atom O6 in the molecule at (3/2 - x, -1/2 + y, 1/2 - z), thus forming C(9) and C(11) chains running parallel to the b axis. The combination of these chains generates a chain of edge-fused R44(40) rings parallel to the ab plane (Fig. 2).
Fig.3 shows two intermolecular π–π interactions between the two symmetry-related pyridine rings withing the complex (I). The ring 3, defined by atoms N1/C1/C2/C3/C4/C5, has perpendicular distance to its symmetry-related counterpart, 3.979 Å. The distance between the ring centroids Cg3 and Cg3i is 3.981 (2) Å. The ring 4, defined by atoms N2/C7/C8/C9/C10/C11, has perpendicular distance to its symmetry-related counterpart, 3.558 Å. The distance between the ring centroids Cg4 and Cg4i is 3.658 (2) Å.