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The title compound, [SnBr4(C2H7N)2], consists of separate centrosymmetric molecules with nearly octahedral geometry, in which the central Sn metal is surrounded by four Br atoms and two dimethylamine ligands. The unique Sn-N bond length is 2.244 (3) Å and the two Sn-Br lengths are 2.5867 (11) and 2.5707 (12) Å. The C-N bond lengths of the amine ligand are 1.482 (6) and 1.492 (6) Å. The unique angle in the SnBr4 plane is 90.82 (3)°, and the axial to equatorial angles are 86.18 (10) and 85.46 (10)°.
Supporting information
CCDC reference: 200743
Key indicators
- Single-crystal X-ray study
- T = 298 K
- Mean (N-C) = 0.005 Å
- R factor = 0.025
- wR factor = 0.065
- Data-to-parameter ratio = 21.9
checkCIF results
No syntax errors found
ADDSYM reports no extra symmetry
Alert Level A:
DIFF_019 Alert A _diffrn_standards_number is missing
Number of standards used in measurement.
DIFF_020 Alert A _diffrn_standards_interval_count and
_diffrn_standards_interval_time are missing. Number of measurements
between standards or time (min) between standards.
2 Alert Level A = Potentially serious problem
0 Alert Level B = Potential problem
0 Alert Level C = Please check
Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Bruker, 1997); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Crystal data top
[SnBr4(C2H7N)2] | F(000) = 484 |
Mr = 528.50 | Dx = 2.674 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3041 reflections |
a = 6.592 (4) Å | θ = 3.0–25.1° |
b = 12.029 (7) Å | µ = 14.08 mm−1 |
c = 8.326 (5) Å | T = 298 K |
β = 96.114 (11)° | Block, colorless |
V = 656.5 (7) Å3 | 0.28 × 0.21 × 0.14 mm |
Z = 2 | |
Data collection top
Bruker SMART APEX diffractometer | 1161 independent reflections |
Radiation source: fine-focus sealed tube | 1028 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.042 |
ω scans | θmax = 25.1°, θmin = 3.0° |
Absorption correction: empirical (using intensity measurements) (SADABS; Bruker, 2001) | h = −7→7 |
Tmin = 0.034, Tmax = 0.135 | k = −14→14 |
5130 measured reflections | l = −9→9 |
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)] = 0.026 | H-atom parameters constrained |
wR(F2) = 0.065 | w = 1/[σ2(Fo2) + (0.0306P)2 + 0.2351P] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | (Δ/σ)max < 0.001 |
1161 reflections | Δρmax = 0.71 e Å−3 |
53 parameters | Δρmin = −0.73 e Å−3 |
0 restraints | Extinction correction: SHELXTL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0021 (5) |
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 >
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 | |
Sn1 | 0.0000 | 0.0000 | 0.0000 | 0.02403 (16) | |
Br2 | −0.24796 (7) | −0.01825 (4) | 0.21934 (6) | 0.04042 (18) | |
Br3 | 0.16035 (7) | −0.18946 (4) | 0.08034 (6) | 0.0438 (2) | |
N4 | 0.2523 (5) | 0.0720 (3) | 0.1709 (4) | 0.0365 (9) | |
H4A | 0.3651 | 0.0337 | 0.1488 | 0.044* | |
C5 | 0.3060 (9) | 0.1898 (4) | 0.1449 (7) | 0.0552 (15) | |
H5A | 0.4155 | 0.2115 | 0.2240 | 0.083* | |
H5B | 0.1892 | 0.2359 | 0.1551 | 0.083* | |
H5C | 0.3480 | 0.1983 | 0.0387 | 0.083* | |
C6 | 0.2406 (8) | 0.0515 (5) | 0.3464 (5) | 0.0542 (14) | |
H6A | 0.3559 | 0.0851 | 0.4081 | 0.081* | |
H6B | 0.2411 | −0.0271 | 0.3665 | 0.081* | |
H6C | 0.1171 | 0.0833 | 0.3776 | 0.081* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Sn1 | 0.0245 (3) | 0.0287 (3) | 0.0187 (2) | 0.00402 (15) | 0.00164 (16) | 0.00229 (15) |
Br2 | 0.0349 (3) | 0.0584 (4) | 0.0297 (3) | 0.0060 (2) | 0.0114 (2) | 0.0074 (2) |
Br3 | 0.0425 (3) | 0.0368 (3) | 0.0515 (3) | 0.01180 (19) | 0.0029 (2) | 0.0108 (2) |
N4 | 0.032 (2) | 0.049 (2) | 0.027 (2) | 0.0048 (17) | −0.0039 (16) | −0.0008 (17) |
C5 | 0.060 (4) | 0.041 (3) | 0.062 (4) | −0.007 (2) | −0.008 (3) | −0.008 (3) |
C6 | 0.046 (3) | 0.088 (4) | 0.026 (3) | 0.001 (3) | −0.004 (2) | −0.005 (3) |
Geometric parameters (Å, º) top
Sn1—N4 | 2.244 (3) | C5—H5A | 0.9600 |
Sn1—Br3 | 2.5707 (12) | C5—H5B | 0.9600 |
Sn1—Br2 | 2.5867 (11) | C5—H5C | 0.9600 |
N4—C5 | 1.482 (6) | C6—H6A | 0.9600 |
N4—C6 | 1.492 (6) | C6—H6B | 0.9600 |
N4—H4A | 0.9100 | C6—H6C | 0.9600 |
| | | |
N4—Sn1—N4i | 180.0 (2) | C6—N4—Sn1 | 116.4 (3) |
N4—Sn1—Br3i | 94.54 (10) | C5—N4—H4A | 104.0 |
N4i—Sn1—Br3i | 85.46 (10) | C6—N4—H4A | 104.0 |
N4—Sn1—Br3 | 85.46 (10) | Sn1—N4—H4A | 104.0 |
N4i—Sn1—Br3 | 94.54 (10) | N4—C5—H5A | 109.5 |
Br3i—Sn1—Br3 | 180.000 (10) | N4—C5—H5B | 109.5 |
N4—Sn1—Br2 | 93.82 (10) | H5A—C5—H5B | 109.5 |
N4i—Sn1—Br2 | 86.18 (10) | N4—C5—H5C | 109.5 |
Br3i—Sn1—Br2 | 89.18 (3) | H5A—C5—H5C | 109.5 |
Br3—Sn1—Br2 | 90.82 (3) | H5B—C5—H5C | 109.5 |
N4—Sn1—Br2i | 86.18 (10) | N4—C6—H6A | 109.5 |
N4i—Sn1—Br2i | 93.82 (10) | N4—C6—H6B | 109.5 |
Br3i—Sn1—Br2i | 90.82 (3) | H6A—C6—H6B | 109.5 |
Br3—Sn1—Br2i | 89.18 (3) | N4—C6—H6C | 109.5 |
Br2—Sn1—Br2i | 180.00 (3) | H6A—C6—H6C | 109.5 |
C5—N4—C6 | 109.8 (4) | H6B—C6—H6C | 109.5 |
C5—N4—Sn1 | 116.7 (3) | | |
Symmetry code: (i) −x, −y, −z. |
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