The title compound, [CoCl
2(C
5H
5N)
2(C
12H
6N
2O
2)]·2C
5H
5N, is a neutral Co
II complex with two chloride anions coordinated in a
cis fashion, two pyridine ligands in
trans positions and a chelating 1,10-phenanthroline-5,6-dione ligand that completes the octahedral coordination geometry. Two pyridine solvent molecules reside in channels (about 7 × 4 Å wide; the closest atom-atom distance within the channel is 10 Å). The three-dimensional structure supporting these channels is held together by C-H
Cl [3.466 (8)-3.670 (9) Å] and C-H
O [3.014 (9)-3.285 (8) Å] hydrogen bonds, and can be viewed as a CsCl or bcu (body-centred cubic) net.
Supporting information
CCDC reference: 649065
N,N'-1,10-Phenanthroline-5,6-diole (Wu et al., 2002) was
prepared from N,N'-1,10-phenanthroline-5,6-dione (Yamada et
al., 1992). The later was prepared from
N,N'-1,10-phenanthroline (Aldrich). Literature procedures were
used in both cases, and the identity of the diol was confirmed by its physical
characteristics (colour and solubility) as well as IR and NMR measurements.
Compound (I) was first obtained by reacting CoCl2(s) with
N,N'-1,10- phenanthroline-5,6-diole in pyridine, and crystals
suitable for X-ray analysis were selected directly from the product of this
reaction. In a subsequent more controlled reaction, compound (I) was prepared
by the reaction of CoCl2·6H2O (12 mg, 0.05 mmol) dissolved in
pyridine (1.5 ml) and N,N'- 1,10-phenanthroline-5,6-dione (10 mg, 0.05 mmol) dissolved in pyridine (4.5 ml). The solutions were mixed at
room temperature, giving a deep orange solution, and after 1 h, orange uniform
cubic crystals started to appear. These were filtered off, and washed twice
with pyridine (1.5 ml) and twice with dichloromethane (3 ml) (yield 21 mg,
69%). The identity of the crystals was confirmed by single-crystal X-ray
diffraction.
Crystals of (I) are racemically twinned with a twin scale factor (Flack
parameter) of 0.55</span><span style=" font-weight:600;">(3). H atoms
were included in calculated positions and refined as riding atoms [C—H =
0.93 Å, with Uiso(H) = 1.2Ueq(C)].
Data collection: COLLECT (Nonius, 2001); cell refinement: DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: CrystalMaker (CrystalMaker, 2003); software used to prepare material for publication: WinGX (Farrugia, 1999).
cis-dichlorido(1,10-phenanthroline-5,6-dione-
κ2N,
N')-
trans- dipyridinecobalt(II) pyridine disolvate
top
Crystal data top
[CoCl2(C5H5N)2(C12H6N2O2)]·2C5H5N | F(000) = 1348.0 |
Mr = 656.44 | Dx = 1.417 Mg m−3 |
Orthorhombic, Pna21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2c -2n | Cell parameters from 5614 reflections |
a = 20.3809 (8) Å | θ = 2.0–26.7° |
b = 9.5957 (3) Å | µ = 0.77 mm−1 |
c = 15.7370 (6) Å | T = 293 K |
V = 3077.67 (19) Å3 | Cube, dark orange |
Z = 4 | 0.1 × 0.1 × 0.1 mm |
Data collection top
Nonius KappaCCD diffractometer | Rint = 0.000 |
Graphite monochromator | θmax = 25°, θmin = 2.0° |
ω/2θ scans | h = −24→24 |
4843 measured reflections | k = −11→11 |
4843 independent reflections | l = −16→16 |
3663 reflections with I > 2/s(I) | |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.051 | H-atom parameters constrained |
wR(F2) = 0.127 | w = 1/[σ2(Fo2) + (0.0618P)2 + 4.1274P] where P = (Fo2 + 2Fc2)/3 |
S = 0.90 | (Δ/σ)max = 0.001 |
5614 reflections | Δρmax = 0.40 e Å−3 |
389 parameters | Δρmin = −0.39 e Å−3 |
1 restraint | Absolute structure: Flack (1983), 2112 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.56 (2) |
Crystal data top
[CoCl2(C5H5N)2(C12H6N2O2)]·2C5H5N | V = 3077.67 (19) Å3 |
Mr = 656.44 | Z = 4 |
Orthorhombic, Pna21 | Mo Kα radiation |
a = 20.3809 (8) Å | µ = 0.77 mm−1 |
b = 9.5957 (3) Å | T = 293 K |
c = 15.7370 (6) Å | 0.1 × 0.1 × 0.1 mm |
Data collection top
Nonius KappaCCD diffractometer | 3663 reflections with I > 2/s(I) |
4843 measured reflections | Rint = 0.000 |
4843 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.051 | H-atom parameters constrained |
wR(F2) = 0.127 | Δρmax = 0.40 e Å−3 |
S = 0.90 | Δρmin = −0.39 e Å−3 |
5614 reflections | Absolute structure: Flack (1983), 2112 Friedel pairs |
389 parameters | Absolute structure parameter: 0.56 (2) |
1 restraint | |
Special details top
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell e.s.d.'s are taken
into account individually in the estimation of e.s.d.'s in distances, angles
and torsion angles; correlations between e.s.d.'s in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell e.s.d.'s is used for estimating e.s.d.'s 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 >
2/s(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 | |
Co | 0.54522 (3) | 0.68554 (6) | 0.97138 (4) | 0.02775 (17) | |
Cl1 | 0.55557 (7) | 0.80833 (14) | 1.10139 (8) | 0.0390 (3) | |
Cl2 | 0.42987 (5) | 0.63387 (13) | 0.97290 (10) | 0.0360 (3) | |
O1 | 0.8147 (2) | 0.6117 (4) | 0.7392 (3) | 0.0499 (11) | |
O2 | 0.7218 (2) | 0.4929 (4) | 0.6367 (3) | 0.0547 (12) | |
N1 | 0.64974 (19) | 0.7098 (4) | 0.9448 (2) | 0.0296 (11) | |
N2 | 0.56013 (19) | 0.5820 (4) | 0.8478 (3) | 0.0296 (10) | |
C1 | 0.6943 (3) | 0.7735 (5) | 0.9941 (3) | 0.0354 (14) | |
H1 | 0.6804 | 0.8119 | 1.0453 | 0.042* | |
C2 | 0.7598 (2) | 0.7850 (5) | 0.9723 (5) | 0.0372 (12) | |
H2 | 0.789 | 0.8303 | 1.0084 | 0.045* | |
C3 | 0.7812 (3) | 0.7297 (6) | 0.8981 (4) | 0.0380 (14) | |
H3 | 0.8252 | 0.7353 | 0.8831 | 0.046* | |
C4 | 0.7362 (2) | 0.6643 (5) | 0.8445 (3) | 0.0306 (12) | |
C5 | 0.7578 (3) | 0.6068 (6) | 0.7624 (4) | 0.0380 (14) | |
C6 | 0.7063 (3) | 0.5370 (6) | 0.7063 (3) | 0.0387 (14) | |
C7 | 0.6380 (3) | 0.5290 (5) | 0.7382 (3) | 0.0321 (13) | |
C8 | 0.5885 (3) | 0.4681 (6) | 0.6909 (3) | 0.0376 (13) | |
H4 | 0.5976 | 0.4295 | 0.638 | 0.045* | |
C9 | 0.5262 (3) | 0.4651 (6) | 0.7224 (4) | 0.0398 (14) | |
H5 | 0.4926 | 0.4244 | 0.691 | 0.048* | |
C10 | 0.5131 (3) | 0.5222 (6) | 0.8006 (3) | 0.0339 (13) | |
H6 | 0.4704 | 0.5195 | 0.8214 | 0.041* | |
C11 | 0.6215 (2) | 0.5863 (5) | 0.8174 (3) | 0.0273 (11) | |
C12 | 0.6712 (2) | 0.6559 (5) | 0.8715 (3) | 0.0277 (12) | |
N3 | 0.5671 (2) | 0.4837 (5) | 1.0316 (3) | 0.0344 (11) | |
C13 | 0.6202 (3) | 0.4663 (7) | 1.0795 (4) | 0.0497 (16) | |
H7 | 0.6469 | 0.543 | 1.0903 | 0.06* | |
C14 | 0.6372 (3) | 0.3397 (7) | 1.1134 (5) | 0.065 (2) | |
H8 | 0.6756 | 0.3315 | 1.1451 | 0.078* | |
C15 | 0.5980 (3) | 0.2247 (7) | 1.1010 (5) | 0.0605 (19) | |
H9 | 0.6092 | 0.1375 | 1.1224 | 0.073* | |
C16 | 0.5418 (3) | 0.2455 (7) | 1.0556 (5) | 0.062 (2) | |
H10 | 0.5121 | 0.1728 | 1.0483 | 0.074* | |
C17 | 0.5291 (3) | 0.3735 (7) | 1.0207 (4) | 0.0496 (16) | |
H11 | 0.4916 | 0.3835 | 0.9875 | 0.06* | |
N4 | 0.5274 (2) | 0.8753 (5) | 0.8985 (3) | 0.0368 (11) | |
C18 | 0.5669 (3) | 0.9848 (7) | 0.9076 (4) | 0.0533 (17) | |
H12 | 0.5994 | 0.9815 | 0.9491 | 0.064* | |
C19 | 0.5617 (4) | 1.1023 (8) | 0.8584 (5) | 0.072 (2) | |
H13 | 0.5891 | 1.1785 | 0.867 | 0.086* | |
C20 | 0.5139 (4) | 1.1034 (8) | 0.7953 (5) | 0.075 (2) | |
H14 | 0.5108 | 1.1794 | 0.7589 | 0.09* | |
C21 | 0.4731 (4) | 0.9983 (8) | 0.7865 (5) | 0.070 (2) | |
H15 | 0.4394 | 1.0005 | 0.7467 | 0.083* | |
C22 | 0.4824 (3) | 0.8830 (7) | 0.8395 (4) | 0.0527 (16) | |
H16 | 0.4548 | 0.8068 | 0.8323 | 0.063* | |
N5 | 0.3183 (3) | 1.1758 (6) | 1.1769 (4) | 0.0494 (14) | |
C23 | 0.3485 (4) | 1.1873 (9) | 1.1014 (6) | 0.088 (3) | |
H23 | 0.3533 | 1.2758 | 1.0781 | 0.106* | |
C24 | 0.3729 (4) | 1.0742 (12) | 1.0561 (7) | 0.104 (3) | |
H24 | 0.3926 | 1.0859 | 1.0032 | 0.124* | |
C25 | 0.3669 (5) | 0.9431 (12) | 1.0927 (9) | 0.111 (4) | |
H25 | 0.3844 | 0.8647 | 1.0664 | 0.134* | |
C26 | 0.3347 (7) | 0.9326 (11) | 1.1682 (7) | 0.112 (4) | |
H26 | 0.3291 | 0.8462 | 1.1939 | 0.134* | |
C27 | 0.3107 (5) | 1.0501 (9) | 1.2058 (5) | 0.081 (3) | |
H27 | 0.2871 | 1.0394 | 1.2559 | 0.097* | |
C29 | 0.1650 (4) | 0.8247 (8) | 1.3146 (7) | 0.087 (3) | |
H18 | 0.128 | 0.8602 | 1.2876 | 0.105* | |
C28 | 0.1973 (4) | 0.7117 (8) | 1.2824 (6) | 0.068 (2) | |
H17 | 0.182 | 0.6732 | 1.2319 | 0.082* | |
C30 | 0.1878 (4) | 0.8830 (8) | 1.3861 (7) | 0.088 (3) | |
H19 | 0.167 | 0.9612 | 1.4083 | 0.106* | |
N6 | 0.2493 (2) | 0.6537 (5) | 1.3190 (4) | 0.0509 (14) | |
C31 | 0.2708 (3) | 0.7124 (7) | 1.3905 (5) | 0.0577 (18) | |
H21 | 0.3071 | 0.6737 | 1.4174 | 0.069* | |
C32 | 0.2416 (4) | 0.8284 (8) | 1.4266 (6) | 0.080 (3) | |
H20 | 0.2577 | 0.8677 | 1.4764 | 0.096* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Co | 0.0229 (3) | 0.0349 (3) | 0.0254 (3) | 0.0002 (3) | 0.0011 (4) | 0.0000 (4) |
Cl1 | 0.0452 (8) | 0.0432 (8) | 0.0285 (7) | −0.0039 (6) | 0.0069 (6) | −0.0055 (7) |
Cl2 | 0.0219 (5) | 0.0477 (7) | 0.0386 (7) | 0.0011 (5) | −0.0002 (7) | 0.0049 (8) |
O1 | 0.041 (3) | 0.057 (3) | 0.053 (3) | 0.004 (2) | 0.016 (2) | 0.005 (2) |
O2 | 0.062 (3) | 0.069 (3) | 0.033 (2) | 0.017 (2) | 0.009 (2) | −0.013 (2) |
N1 | 0.021 (2) | 0.042 (3) | 0.026 (3) | −0.0026 (19) | 0.0029 (15) | −0.0042 (18) |
N2 | 0.024 (2) | 0.034 (2) | 0.031 (3) | −0.0001 (18) | −0.0034 (18) | −0.001 (2) |
C1 | 0.033 (3) | 0.036 (3) | 0.037 (4) | −0.005 (2) | −0.005 (2) | −0.009 (2) |
C2 | 0.024 (2) | 0.047 (3) | 0.040 (3) | −0.008 (2) | −0.012 (3) | 0.000 (4) |
C3 | 0.021 (3) | 0.049 (4) | 0.044 (4) | −0.002 (2) | 0.000 (2) | 0.003 (3) |
C4 | 0.030 (3) | 0.029 (3) | 0.032 (3) | 0.000 (2) | 0.000 (2) | 0.003 (2) |
C5 | 0.037 (3) | 0.046 (4) | 0.031 (3) | 0.007 (3) | 0.011 (2) | 0.005 (3) |
C6 | 0.048 (4) | 0.036 (3) | 0.032 (3) | 0.009 (3) | 0.001 (3) | 0.000 (3) |
C7 | 0.048 (4) | 0.025 (3) | 0.024 (3) | 0.007 (2) | 0.002 (2) | −0.003 (2) |
C8 | 0.050 (4) | 0.031 (3) | 0.032 (3) | −0.001 (3) | −0.003 (3) | −0.003 (3) |
C9 | 0.048 (4) | 0.035 (3) | 0.036 (3) | −0.007 (3) | −0.015 (3) | −0.001 (3) |
C10 | 0.025 (3) | 0.043 (3) | 0.034 (3) | −0.006 (2) | −0.001 (2) | 0.006 (3) |
C11 | 0.023 (3) | 0.022 (3) | 0.036 (3) | 0.000 (2) | −0.004 (2) | 0.001 (2) |
C12 | 0.021 (3) | 0.032 (3) | 0.030 (3) | 0.001 (2) | 0.001 (2) | 0.002 (2) |
N3 | 0.034 (3) | 0.035 (3) | 0.034 (3) | −0.002 (2) | 0.000 (2) | −0.004 (2) |
C13 | 0.039 (3) | 0.056 (4) | 0.054 (4) | −0.006 (3) | −0.012 (3) | 0.012 (3) |
C14 | 0.055 (4) | 0.064 (5) | 0.076 (5) | −0.005 (3) | −0.027 (4) | 0.028 (4) |
C15 | 0.068 (5) | 0.046 (4) | 0.067 (4) | −0.001 (3) | −0.028 (4) | 0.018 (3) |
C16 | 0.062 (4) | 0.043 (4) | 0.080 (6) | −0.015 (4) | −0.022 (4) | 0.013 (4) |
C17 | 0.045 (4) | 0.047 (4) | 0.056 (4) | −0.003 (3) | −0.017 (3) | 0.003 (3) |
N4 | 0.045 (3) | 0.038 (3) | 0.028 (3) | −0.001 (2) | −0.005 (2) | 0.000 (2) |
C18 | 0.057 (4) | 0.055 (4) | 0.048 (4) | −0.006 (3) | −0.010 (3) | 0.008 (3) |
C19 | 0.090 (6) | 0.056 (5) | 0.069 (5) | −0.027 (4) | −0.024 (4) | 0.010 (4) |
C20 | 0.092 (6) | 0.064 (5) | 0.069 (5) | −0.018 (4) | −0.035 (5) | 0.023 (4) |
C21 | 0.094 (6) | 0.056 (4) | 0.058 (5) | −0.013 (4) | −0.036 (4) | 0.017 (4) |
C22 | 0.055 (4) | 0.048 (4) | 0.055 (4) | −0.003 (3) | −0.006 (3) | 0.012 (3) |
N5 | 0.047 (3) | 0.049 (4) | 0.052 (4) | 0.004 (3) | −0.002 (3) | −0.013 (3) |
C23 | 0.094 (6) | 0.081 (6) | 0.089 (6) | −0.015 (5) | 0.033 (5) | −0.037 (5) |
C24 | 0.072 (6) | 0.125 (9) | 0.114 (8) | −0.021 (6) | 0.034 (5) | −0.064 (7) |
C25 | 0.078 (7) | 0.094 (8) | 0.162 (12) | 0.019 (6) | −0.018 (7) | −0.070 (8) |
C26 | 0.170 (12) | 0.071 (7) | 0.094 (8) | 0.025 (7) | −0.039 (8) | −0.021 (6) |
C27 | 0.118 (8) | 0.063 (6) | 0.062 (5) | 0.017 (5) | −0.003 (5) | −0.008 (4) |
C29 | 0.052 (5) | 0.051 (5) | 0.159 (10) | 0.008 (4) | −0.006 (5) | −0.006 (6) |
C28 | 0.059 (5) | 0.067 (5) | 0.079 (6) | 0.022 (4) | −0.015 (4) | −0.009 (4) |
C30 | 0.042 (5) | 0.048 (5) | 0.175 (10) | 0.014 (4) | 0.015 (5) | −0.036 (6) |
N6 | 0.038 (3) | 0.047 (3) | 0.067 (4) | 0.007 (2) | 0.002 (3) | −0.007 (3) |
C31 | 0.048 (4) | 0.055 (4) | 0.069 (5) | −0.010 (3) | 0.007 (3) | −0.011 (4) |
C32 | 0.062 (5) | 0.073 (5) | 0.105 (6) | −0.008 (4) | 0.013 (4) | −0.047 (5) |
Geometric parameters (Å, º) top
Co—N4 | 2.182 (5) | C15—H9 | 0.93 |
Co—N1 | 2.183 (4) | C16—C17 | 1.370 (9) |
Co—N2 | 2.205 (4) | C16—H10 | 0.93 |
Co—N3 | 2.203 (5) | C17—H11 | 0.93 |
Co—Cl1 | 2.3705 (14) | N4—C22 | 1.307 (8) |
Co—Cl2 | 2.4029 (12) | N4—C18 | 1.332 (8) |
O1—C5 | 1.217 (7) | C18—C19 | 1.372 (9) |
O2—C6 | 1.216 (7) | C18—H12 | 0.93 |
N1—C1 | 1.341 (6) | C19—C20 | 1.391 (10) |
N1—C12 | 1.338 (6) | C19—H13 | 0.93 |
N2—C10 | 1.342 (7) | C20—C21 | 1.315 (10) |
N2—C11 | 1.339 (6) | C20—H14 | 0.93 |
C1—C2 | 1.383 (7) | C21—C22 | 1.398 (9) |
C1—H1 | 0.93 | C21—H15 | 0.93 |
C2—C3 | 1.355 (8) | C22—H16 | 0.93 |
C2—H2 | 0.93 | N5—C27 | 1.297 (9) |
C3—C4 | 1.396 (7) | N5—C23 | 1.343 (10) |
C3—H3 | 0.93 | C23—C24 | 1.391 (11) |
C4—C12 | 1.394 (7) | C23—H23 | 0.93 |
C4—C5 | 1.473 (8) | C24—C25 | 1.389 (14) |
C5—C6 | 1.526 (8) | C24—H24 | 0.93 |
C6—C7 | 1.483 (8) | C25—C26 | 1.361 (15) |
C7—C8 | 1.384 (7) | C25—H25 | 0.93 |
C7—C11 | 1.404 (7) | C26—C27 | 1.364 (13) |
C8—C9 | 1.364 (8) | C26—H26 | 0.93 |
C8—H4 | 0.93 | C27—H27 | 0.93 |
C9—C10 | 1.373 (8) | C29—C30 | 1.339 (12) |
C9—H5 | 0.93 | C29—C28 | 1.366 (11) |
C10—H6 | 0.93 | C29—H18 | 0.93 |
C11—C12 | 1.482 (7) | C28—N6 | 1.329 (9) |
N3—C17 | 1.322 (7) | C28—H17 | 0.93 |
N3—C13 | 1.328 (7) | C30—C32 | 1.373 (12) |
C13—C14 | 1.372 (8) | C30—H19 | 0.93 |
C13—H7 | 0.93 | N6—C31 | 1.332 (9) |
C14—C15 | 1.377 (9) | C31—C32 | 1.384 (9) |
C14—H8 | 0.93 | C31—H21 | 0.93 |
C15—C16 | 1.365 (9) | C32—H20 | 0.93 |
| | | |
N4—Co—N1 | 88.46 (17) | C13—C14—C15 | 120.5 (6) |
N4—Co—N2 | 86.31 (16) | C13—C14—H8 | 119.7 |
N1—Co—N2 | 75.21 (15) | C15—C14—H8 | 119.7 |
N4—Co—N3 | 173.64 (17) | C16—C15—C14 | 116.4 (6) |
N1—Co—N3 | 88.75 (16) | C16—C15—H9 | 121.8 |
N2—Co—N3 | 87.46 (16) | C14—C15—H9 | 121.8 |
N4—Co—Cl1 | 93.07 (13) | C15—C16—C17 | 120.0 (6) |
N1—Co—Cl1 | 91.46 (11) | C15—C16—H10 | 120 |
N2—Co—Cl1 | 166.66 (11) | C17—C16—H10 | 120 |
N3—Co—Cl1 | 92.72 (12) | N3—C17—C16 | 123.6 (6) |
N4—Co—Cl2 | 90.82 (13) | N3—C17—H11 | 118.2 |
N1—Co—Cl2 | 168.11 (11) | C16—C17—H11 | 118.2 |
N2—Co—Cl2 | 92.90 (11) | C22—N4—C18 | 117.1 (5) |
N3—Co—Cl2 | 90.73 (12) | C22—N4—Co | 122.5 (4) |
Cl1—Co—Cl2 | 100.43 (5) | C18—N4—Co | 120.1 (4) |
C1—N1—C12 | 117.0 (4) | N4—C18—C19 | 122.7 (6) |
C1—N1—Co | 126.8 (3) | N4—C18—H12 | 118.6 |
C12—N1—Co | 116.2 (3) | C19—C18—H12 | 118.6 |
C10—N2—C11 | 118.9 (5) | C18—C19—C20 | 117.7 (7) |
C10—N2—Co | 125.6 (4) | C18—C19—H13 | 121.2 |
C11—N2—Co | 115.4 (3) | C20—C19—H13 | 121.2 |
N1—C1—C2 | 123.2 (5) | C21—C20—C19 | 120.8 (7) |
N1—C1—H1 | 118.4 | C21—C20—H14 | 119.6 |
C2—C1—H1 | 118.4 | C19—C20—H14 | 119.6 |
C3—C2—C1 | 119.5 (5) | C20—C21—C22 | 117.3 (7) |
C3—C2—H2 | 120.2 | C20—C21—H15 | 121.4 |
C1—C2—H2 | 120.2 | C22—C21—H15 | 121.4 |
C2—C3—C4 | 119.1 (5) | N4—C22—C21 | 124.3 (6) |
C2—C3—H3 | 120.5 | N4—C22—H16 | 117.8 |
C4—C3—H3 | 120.5 | C21—C22—H16 | 117.8 |
C3—C4—C12 | 117.8 (5) | C27—N5—C23 | 116.2 (7) |
C3—C4—C5 | 120.2 (5) | N5—C23—C24 | 123.6 (9) |
C12—C4—C5 | 122.0 (5) | N5—C23—H23 | 118.2 |
O1—C5—C4 | 122.2 (5) | C24—C23—H23 | 118.2 |
O1—C5—C6 | 120.0 (5) | C25—C24—C23 | 117.5 (10) |
C4—C5—C6 | 117.8 (5) | C25—C24—H24 | 121.2 |
O2—C6—C7 | 122.1 (5) | C23—C24—H24 | 121.2 |
O2—C6—C5 | 119.7 (5) | C26—C25—C24 | 118.1 (9) |
C7—C6—C5 | 118.2 (5) | C26—C25—H25 | 120.9 |
C8—C7—C11 | 118.0 (5) | C24—C25—H25 | 120.9 |
C8—C7—C6 | 121.6 (5) | C25—C26—C27 | 119.4 (11) |
C11—C7—C6 | 120.4 (5) | C25—C26—H26 | 120.3 |
C9—C8—C7 | 119.5 (5) | C27—C26—H26 | 120.3 |
C9—C8—H4 | 120.3 | N5—C27—C26 | 125.0 (10) |
C7—C8—H4 | 120.3 | N5—C27—H27 | 117.5 |
C8—C9—C10 | 119.9 (5) | C26—C27—H27 | 117.5 |
C8—C9—H5 | 120 | C30—C29—C28 | 118.4 (8) |
C10—C9—H5 | 120 | C30—C29—H18 | 120.8 |
N2—C10—C9 | 121.8 (5) | C28—C29—H18 | 120.8 |
N2—C10—H6 | 119.1 | N6—C28—C29 | 123.8 (8) |
C9—C10—H6 | 119.1 | N6—C28—H17 | 118.1 |
N2—C11—C7 | 121.9 (5) | C29—C28—H17 | 118.1 |
N2—C11—C12 | 116.6 (4) | C29—C30—C32 | 120.5 (7) |
C7—C11—C12 | 121.5 (5) | C29—C30—H19 | 119.7 |
N1—C12—C4 | 123.4 (5) | C32—C30—H19 | 119.7 |
N1—C12—C11 | 116.5 (4) | C28—N6—C31 | 116.8 (6) |
C4—C12—C11 | 120.1 (4) | N6—C31—C32 | 123.1 (7) |
C17—N3—C13 | 116.8 (5) | N6—C31—H21 | 118.4 |
C17—N3—Co | 121.9 (4) | C32—C31—H21 | 118.4 |
C13—N3—Co | 121.3 (4) | C30—C32—C31 | 117.3 (8) |
N3—C13—C14 | 122.5 (6) | C30—C32—H20 | 121.3 |
N3—C13—H7 | 118.7 | C31—C32—H20 | 121.3 |
C14—C13—H7 | 118.7 | | |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H5···Cl1i | 0.93 | 2.81 | 3.642 (7) | 149 |
C20—H14···Cl1ii | 0.93 | 2.82 | 3.466 (8) | 127 |
C8—H4···Cl2i | 0.93 | 2.73 | 3.588 (6) | 154 |
C30—H19···Cl2iii | 0.93 | 2.77 | 3.670 (9) | 162 |
C14—H8···O1iv | 0.93 | 2.59 | 3.115 (9) | 116 |
C15—H9···O1iv | 0.93 | 2.42 | 3.014 (9) | 122 |
C2—H2···O2v | 0.93 | 2.56 | 3.285 (8) | 135 |
Symmetry codes: (i) −x+1, −y+1, z−1/2; (ii) −x+1, −y+2, z−1/2; (iii) −x+1/2, y+1/2, z+1/2; (iv) −x+3/2, y−1/2, z+1/2; (v) −x+3/2, y+1/2, z+1/2. |
Experimental details
Crystal data |
Chemical formula | [CoCl2(C5H5N)2(C12H6N2O2)]·2C5H5N |
Mr | 656.44 |
Crystal system, space group | Orthorhombic, Pna21 |
Temperature (K) | 293 |
a, b, c (Å) | 20.3809 (8), 9.5957 (3), 15.7370 (6) |
V (Å3) | 3077.67 (19) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.77 |
Crystal size (mm) | 0.1 × 0.1 × 0.1 |
|
Data collection |
Diffractometer | Nonius KappaCCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2/s(I)] reflections | 4843, 4843, 3663 |
Rint | 0.000 |
(sin θ/λ)max (Å−1) | 0.595 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.127, 0.90 |
No. of reflections | 5614 |
No. of parameters | 389 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.40, −0.39 |
Absolute structure | Flack (1983), 2112 Friedel pairs |
Absolute structure parameter | 0.56 (2) |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H5···Cl1i | 0.93 | 2.81 | 3.642 (7) | 149 |
C20—H14···Cl1ii | 0.93 | 2.82 | 3.466 (8) | 127 |
C8—H4···Cl2i | 0.93 | 2.73 | 3.588 (6) | 154 |
C30—H19···Cl2iii | 0.93 | 2.77 | 3.670 (9) | 162 |
C14—H8···O1iv | 0.93 | 2.59 | 3.115 (9) | 116 |
C15—H9···O1iv | 0.93 | 2.42 | 3.014 (9) | 122 |
C2—H2···O2v | 0.93 | 2.56 | 3.285 (8) | 135 |
Symmetry codes: (i) −x+1, −y+1, z−1/2; (ii) −x+1, −y+2, z−1/2; (iii) −x+1/2, y+1/2, z+1/2; (iv) −x+3/2, y−1/2, z+1/2; (v) −x+3/2, y+1/2, z+1/2. |
The N,N'-1,10-phenanthroline-5,6-dione ligand continues to be important for coordination chemistry (Calderazzo et al., 2002; Fujihara et al., 2003; Margiotta et al., 2004; Zhang et al., 2003), analytical chemistry (del Pozo et al., 2005; Gatti et al., 2004; Shabir & Forrow, 2003) and biophysical chemistry (Berger et al., 2004; Wu et al., 2002). The fate of complexes with this ligand in different solutions is therefore an important issue, and we recently showed how seemingly stable and innocent [please clarify what this means in this context] tris(phenanthroline-5,6-dione)–CoIII complexes could yield both CoII complexes and phenanthroline-5,6-diole complexes over time (Larsson & Öhrström, 2004). This is not the only type of transformation that can occur (Fig. 1), and notably we also detected the complete transformation of the original complex to the bis-hydrated form (Lei & Anson, 1995; Lei et al., 1996) in an aqueous solution (see 1c in Fig. 1).
It is therefore prudent to double check any assignment of the (5,6)-carbon–carbon bond, and the carbon–oxygen bond, in either ones own X-ray structures or structures downloaded from the Cambridge Structural Database (CSD; Allen & Motherwell, 2002) or other sources. This is especially important for room-temperature data since subtle differences in bond lengths are all the evidence that there will be to detect the differences between the dione and the diol in the absence of an unambiguous location of the H atoms in the electron density map. In Fig. 2 are plotted the C—O distances against the C—C distances for diketone and diol fragments found in the CSD (Version 1.7) having different bond assignments. Clearly, the large majority of data are unambigous, but there are also a few cases that, based on these data alone, seem questionable. It can be noted that data in the small grouping at the centre of the graph correspond mainly to semi-quinone radical systems.
Here we report another example of an unexpected transformation, this time from the diol to the dione. The title compound, (I), was first obtained by reacting CoCl2(s) with N,N'-1,10- phenanthroline-5,6-diole in pyridine. A subsequent preparation using CoCl2(s) and N,N'-1,10-phenanthroline-5,6-dione in pyridine afforded compound (I) in good yield. The dione assignment was unambiguous [C6—O2 = 1.216 (7) Å, C5—O1 = 1.217 (7) Å and C5—C6 = 1.526 (8) Å]. The O1—C5—C6—O2 torsion angle of 3.406 (s.u.?)° supports this assignment. The slight deviation from planarity is not unusual and is due to asymmetric interactions with a neighbouring complex, the closest O···H interactions in this case being 2.4–2.6 Å [s.u.'s available?]; otherwise, the molecular structure is unremarkable (Fig. 3). All the Co—N and Co—Cl distances are as expected for a CoII complex. A small deviation from linearity for the N1A—Co—N1B angle [173.58(s.u.?)°] can probably be traced to repulsion with the two chloride anions.
In contrast, the intermolecular interactions are worth a closer analysis. Despite the many aromatic molecules there are no obvious π–π interactions, but there is some indication of a σ–π interaction between the lone pairs on the N atoms and the electron-deficient part of the phenanthrolinedione ligand; the N···C distances vary between 2.65 and 2.94 Å [s.u.'s available?]. These interactions will, however, be weak, and consequently the non-classical hydrogen-bonds between ketones or coordinated chlorides and aromatic CH H atoms reported in Table 1 may dominate among the intermolecular forces. These interactions are in agreement with other, recently published, studies on MCl2(L) complexes, where the C—H···Cl interactions were inferred to be as crucial for the resulting structure (Balamurugan et al., 2004; Xuan et al., 2003).
Consequently, taking the C—H···Cl and C—H···O interactions as defining the three-dimensional connectivity, it has a distorted CsCl-type net or, according to the nomenclature described by O'Keeffe & Yaghi (2005) and Öhrström & Larsson (2005), a bcu (body centred cubic) arrangement. A previous example of this type of net was found for the coordination polymer [La(2,2'-bipyridine-N,N'-dioxide)4](CF3SO3)3·4.2MeOH (Long et al., 2001). In the relatively spaceous channels thus formed, the pyridine molecules cocrystallize with the complex (Fig. 4). These solvent molecules occupy 38% of the unit-cell volume as calculated using PLATON (Spek, 2003).
From the average values of the principal mean-square atomic displacement U factors of the C atoms it can be deduced that the solvent pyridine molecules are more flexible than the coordinated pyridine ligands, as the mean U factors are larger by 40%. The low `solvent' Ueq for atom N5 may also indicate dissorder of the solvent pyridine molecules, but the introduction of further modeling does not seem meaningful.
In conclusion, although (I) cannot be claimed as being porous, or having other intersting properties associated with three- dimensional nets, this study underlines the utility of network analysis (Öhrström & Larsson, 2005) for the understanding of `small molecule' crystal structures.