metal-organic compounds
Substitutional disorder in the ionic diorganoantimony halide adduct [bromido/chlorido(0.33/0.67)][2-(dimethylaminomethyl)phenyl][2-(dimethylammoniomethyl)phenyl]antimony(III) 0.75-bromide 0.25-chloride
aFaculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany Janos Street, No. 11, RO-400028, Cluj Napoca, Romania
*Correspondence e-mail: asoran@chem.ubbcluj.ro
The title complex, [SbBr0.33Cl0.67(C9H13N)(C9H12N)]Br0.75Cl0.25, exhibits substitutional disorder of both halogen atoms in the however, with different occupancies. Thus, the halogen atom bonded to Sb has 0.67 (4) occupancy for Cl and 0.33 (4) for Br, while the anionic halogen atom shows 0.75 (4) occupancy for Br and 0.25 (4) for Cl. An N—H⋯Cl/Br hydrogen bond is established between the cation and the halide anion. The coordination geometry of the Sb center in the cation is distorted pseudo-trigonal-bipyramidal as a result of the strong intramolecular N→Sb coordination trans to the Sb—Cl/Br bond. The pendant arm on the second ligand is twisted away from the metal center. The compound crystallizes as a racemate, i.e. a mixture of (RN2,CSb1) and (SN2,ASb1) isomers with respect to induced by the coordinating N atom and chelate-induced Sb These isomers are associated through Cphenyl—H⋯Cl/Br hydrogen bonds, forming a three-dimensional architecture.
Related literature
For an isostructural compound, see: Opris et al. (2003). For related ionic organoantimony adducts, see: Sharma et al. (2004). For the induced by the coordination of the N atom, see: IUPAC (1979, 2005). For Sb—N distances, see: Emsley (1994).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2000); cell SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: enCIFer (Allen et al., 2004) and publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536810009797/zb2001sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810009797/zb2001Isup2.hkl
In the attempted synthesis of R2SbMes from mesitylmagnesium bromide and R2SbCl.(R = 2-Me2NCH2C6H4), crystals of the title compound were isolated from a chloroform-hexane mixture, due to partial hydrolysis followed by the protonation of one of the organic ligands.
All hydrogen atoms, except H1 attached to N1, were placed in calculated positions using a riding model, with C—H = 0.93–0.97 Å and with Uiso=1.5Ueq (C) for methyl H and Uiso= 1.2Ueq (C) for aryl H. The methyl groups were allowed to rotate while retaining tetrahedral geometry. The H1 hydrogen atom attached to N1 nitrogen atom was located from the difference map and the N1—H1 distance was restrained to 0.86 Å. The two halide atoms were refined as substitutional disorder between chlorine and bromine, with 0.67 occupancy for Cl and 0.33 for Br for Cl1/Br1 and 0.75 occupancy for Br and 0.25 for Cl for Cl2/Br2.
Data collection: SMART (Bruker, 2000); cell
SAINT-Plus (Bruker, 2000); data reduction: SAINT-Plus (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: enCIFer (Allen et al., 2004) and publCIF (Westrip, 2010).[SbBr0.33Cl0.67(C9H13N)(C9H12N)]Br0.75Cl0.25 | F(000) = 1000 |
Mr = 510.07 | Dx = 1.581 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3355 reflections |
a = 13.8159 (19) Å | θ = 2.3–22.7° |
b = 12.6775 (18) Å | µ = 3.30 mm−1 |
c = 12.5984 (17) Å | T = 297 K |
β = 105.342 (3)° | Block, colourless |
V = 2128.0 (5) Å3 | 0.28 × 0.22 × 0.18 mm |
Z = 4 |
Bruker SMART APEX CCD area-detector diffractometer | 3745 independent reflections |
Radiation source: fine-focus sealed tube | 3298 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.044 |
phi and ω scans | θmax = 25.0°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −16→16 |
Tmin = 0.458, Tmax = 0.588 | k = −15→15 |
15150 measured reflections | l = −14→14 |
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)] = 0.045 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.112 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.15 | w = 1/[σ2(Fo2) + (0.0441P)2 + 3.758P] where P = (Fo2 + 2Fc2)/3 |
3745 reflections | (Δ/σ)max < 0.001 |
216 parameters | Δρmax = 1.47 e Å−3 |
2 restraints | Δρmin = −0.56 e Å−3 |
[SbBr0.33Cl0.67(C9H13N)(C9H12N)]Br0.75Cl0.25 | V = 2128.0 (5) Å3 |
Mr = 510.07 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 13.8159 (19) Å | µ = 3.30 mm−1 |
b = 12.6775 (18) Å | T = 297 K |
c = 12.5984 (17) Å | 0.28 × 0.22 × 0.18 mm |
β = 105.342 (3)° |
Bruker SMART APEX CCD area-detector diffractometer | 3745 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | 3298 reflections with I > 2σ(I) |
Tmin = 0.458, Tmax = 0.588 | Rint = 0.044 |
15150 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | 2 restraints |
wR(F2) = 0.112 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.15 | Δρmax = 1.47 e Å−3 |
3745 reflections | Δρmin = −0.56 e Å−3 |
216 parameters |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
Br2 | 0.96752 (7) | 0.33618 (8) | 0.40075 (9) | 0.0779 (3) | 0.75 |
Br1 | 0.25490 (8) | 0.45952 (8) | 0.05792 (9) | 0.0561 (3) | 0.33 |
C1 | 0.2796 (4) | 0.5553 (4) | 0.3124 (4) | 0.0415 (13) | |
C2 | 0.1990 (5) | 0.5470 (5) | 0.3592 (5) | 0.0474 (14) | |
C3 | 0.2080 (5) | 0.4808 (5) | 0.4502 (5) | 0.0593 (17) | |
H3 | 0.1550 | 0.4756 | 0.4825 | 0.071* | |
C4 | 0.2929 (6) | 0.4238 (6) | 0.4923 (5) | 0.069 (2) | |
H4 | 0.2968 | 0.3790 | 0.5517 | 0.082* | |
C5 | 0.3730 (5) | 0.4323 (5) | 0.4473 (5) | 0.0623 (18) | |
H5 | 0.4315 | 0.3943 | 0.4770 | 0.075* | |
C6 | 0.3662 (5) | 0.4972 (5) | 0.3581 (5) | 0.0503 (15) | |
H6 | 0.4204 | 0.5024 | 0.3277 | 0.060* | |
C7 | 0.1020 (5) | 0.6079 (5) | 0.3195 (5) | 0.0540 (16) | |
H7A | 0.0884 | 0.6451 | 0.3813 | 0.065* | |
H7B | 0.1100 | 0.6601 | 0.2662 | 0.065* | |
C8 | 0.0235 (6) | 0.4925 (8) | 0.1645 (6) | 0.094 (3) | |
H8A | −0.0344 | 0.4499 | 0.1326 | 0.141* | |
H8B | 0.0827 | 0.4494 | 0.1790 | 0.141* | |
H8C | 0.0285 | 0.5478 | 0.1142 | 0.141* | |
C9 | −0.0813 (6) | 0.6012 (8) | 0.2520 (9) | 0.100 (3) | |
H9A | −0.0800 | 0.6602 | 0.2046 | 0.150* | |
H9B | −0.0867 | 0.6264 | 0.3221 | 0.150* | |
H9C | −0.1379 | 0.5572 | 0.2195 | 0.150* | |
C10 | 0.4296 (4) | 0.6542 (4) | 0.1811 (5) | 0.0414 (13) | |
C11 | 0.4834 (4) | 0.7263 (4) | 0.2586 (5) | 0.0435 (13) | |
C12 | 0.5832 (5) | 0.7454 (5) | 0.2665 (6) | 0.0598 (17) | |
H12 | 0.6190 | 0.7925 | 0.3190 | 0.072* | |
C13 | 0.6304 (5) | 0.6950 (5) | 0.1970 (6) | 0.0594 (17) | |
H13 | 0.6975 | 0.7094 | 0.2022 | 0.071* | |
C14 | 0.5804 (5) | 0.6252 (5) | 0.1218 (6) | 0.0564 (16) | |
H14 | 0.6131 | 0.5908 | 0.0759 | 0.068* | |
C15 | 0.4796 (4) | 0.6046 (5) | 0.1128 (5) | 0.0481 (14) | |
H15 | 0.4451 | 0.5569 | 0.0602 | 0.058* | |
C16 | 0.4306 (5) | 0.7800 (5) | 0.3341 (5) | 0.0559 (16) | |
H16A | 0.4337 | 0.7359 | 0.3979 | 0.067* | |
H16B | 0.4634 | 0.8465 | 0.3595 | 0.067* | |
C17 | 0.3179 (6) | 0.8851 (5) | 0.1948 (6) | 0.0618 (18) | |
H17A | 0.3399 | 0.9496 | 0.2336 | 0.093* | |
H17B | 0.2495 | 0.8926 | 0.1521 | 0.093* | |
H17C | 0.3596 | 0.8696 | 0.1468 | 0.093* | |
C18 | 0.2643 (6) | 0.8243 (6) | 0.3521 (6) | 0.0659 (19) | |
H18A | 0.2700 | 0.7678 | 0.4042 | 0.099* | |
H18B | 0.1952 | 0.8329 | 0.3122 | 0.099* | |
H18C | 0.2885 | 0.8884 | 0.3905 | 0.099* | |
Cl1 | 0.25490 (8) | 0.45952 (8) | 0.05792 (9) | 0.0561 (3) | 0.67 |
Cl2 | 0.96752 (7) | 0.33618 (8) | 0.40075 (9) | 0.0779 (3) | 0.25 |
H1 | 0.008 (6) | 0.492 (5) | 0.315 (5) | 0.08 (3)* | |
N1 | 0.0135 (4) | 0.5386 (5) | 0.2675 (5) | 0.0636 (15) | |
N2 | 0.3249 (4) | 0.7990 (4) | 0.2740 (4) | 0.0486 (12) | |
Sb1 | 0.27062 (3) | 0.64376 (3) | 0.16318 (3) | 0.03907 (15) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br2 | 0.0744 (6) | 0.0738 (6) | 0.0876 (7) | −0.0200 (5) | 0.0252 (5) | −0.0053 (5) |
Br1 | 0.0655 (7) | 0.0544 (6) | 0.0513 (6) | 0.0023 (5) | 0.0203 (5) | −0.0077 (5) |
C1 | 0.053 (3) | 0.041 (3) | 0.030 (3) | 0.002 (3) | 0.010 (2) | 0.000 (2) |
C2 | 0.052 (4) | 0.049 (3) | 0.039 (3) | −0.006 (3) | 0.009 (3) | −0.002 (3) |
C3 | 0.064 (4) | 0.073 (5) | 0.043 (3) | −0.011 (4) | 0.017 (3) | 0.009 (3) |
C4 | 0.085 (5) | 0.071 (5) | 0.042 (4) | −0.007 (4) | 0.004 (4) | 0.015 (3) |
C5 | 0.069 (5) | 0.053 (4) | 0.054 (4) | 0.007 (3) | −0.004 (3) | 0.011 (3) |
C6 | 0.050 (4) | 0.054 (4) | 0.046 (3) | 0.004 (3) | 0.012 (3) | 0.001 (3) |
C7 | 0.056 (4) | 0.057 (4) | 0.056 (4) | 0.000 (3) | 0.026 (3) | 0.003 (3) |
C8 | 0.077 (6) | 0.135 (8) | 0.064 (5) | −0.026 (5) | 0.010 (4) | −0.011 (5) |
C9 | 0.044 (4) | 0.111 (7) | 0.145 (9) | 0.006 (4) | 0.023 (5) | 0.025 (6) |
C10 | 0.042 (3) | 0.044 (3) | 0.040 (3) | 0.002 (2) | 0.013 (2) | 0.004 (2) |
C11 | 0.050 (3) | 0.039 (3) | 0.039 (3) | 0.004 (3) | 0.006 (3) | 0.003 (2) |
C12 | 0.054 (4) | 0.052 (4) | 0.063 (4) | −0.010 (3) | −0.002 (3) | 0.005 (3) |
C13 | 0.048 (4) | 0.056 (4) | 0.075 (5) | −0.001 (3) | 0.018 (3) | 0.013 (3) |
C14 | 0.052 (4) | 0.061 (4) | 0.062 (4) | 0.008 (3) | 0.024 (3) | 0.005 (3) |
C15 | 0.050 (4) | 0.052 (3) | 0.041 (3) | 0.000 (3) | 0.012 (3) | −0.001 (3) |
C16 | 0.062 (4) | 0.052 (4) | 0.049 (4) | 0.000 (3) | 0.007 (3) | −0.013 (3) |
C17 | 0.076 (5) | 0.040 (3) | 0.067 (4) | 0.003 (3) | 0.015 (4) | 0.003 (3) |
C18 | 0.082 (5) | 0.061 (4) | 0.059 (4) | 0.008 (4) | 0.026 (4) | −0.018 (3) |
Cl1 | 0.0655 (7) | 0.0544 (6) | 0.0513 (6) | 0.0023 (5) | 0.0203 (5) | −0.0077 (5) |
Cl2 | 0.0744 (6) | 0.0738 (6) | 0.0876 (7) | −0.0200 (5) | 0.0252 (5) | −0.0053 (5) |
N1 | 0.050 (3) | 0.076 (4) | 0.067 (4) | −0.001 (3) | 0.018 (3) | 0.013 (3) |
N2 | 0.062 (3) | 0.041 (3) | 0.044 (3) | 0.004 (2) | 0.016 (2) | −0.006 (2) |
Sb1 | 0.0428 (2) | 0.0423 (2) | 0.0326 (2) | 0.00455 (16) | 0.01080 (16) | 0.00087 (16) |
Br1—Sb1 | 2.6662 (11) | C10—C11 | 1.398 (8) |
C1—C6 | 1.393 (8) | C10—Sb1 | 2.152 (6) |
C1—C2 | 1.396 (8) | C11—C12 | 1.378 (9) |
C1—Sb1 | 2.164 (5) | C11—C16 | 1.507 (8) |
C2—C3 | 1.400 (8) | C12—C13 | 1.379 (9) |
C2—C7 | 1.512 (9) | C12—H12 | 0.9300 |
C3—C4 | 1.359 (10) | C13—C14 | 1.347 (9) |
C3—H3 | 0.9300 | C13—H13 | 0.9300 |
C4—C5 | 1.375 (10) | C14—C15 | 1.392 (9) |
C4—H4 | 0.9300 | C14—H14 | 0.9300 |
C5—C6 | 1.376 (8) | C15—H15 | 0.9300 |
C5—H5 | 0.9300 | C16—N2 | 1.476 (8) |
C6—H6 | 0.9300 | C16—H16A | 0.9700 |
C7—N1 | 1.507 (8) | C16—H16B | 0.9700 |
C7—H7A | 0.9700 | C17—N2 | 1.465 (8) |
C7—H7B | 0.9700 | C17—H17A | 0.9600 |
C8—N1 | 1.463 (10) | C17—H17B | 0.9600 |
C8—H8A | 0.9600 | C17—H17C | 0.9600 |
C8—H8B | 0.9600 | C18—N2 | 1.486 (8) |
C8—H8C | 0.9600 | C18—H18A | 0.9600 |
C9—N1 | 1.500 (9) | C18—H18B | 0.9600 |
C9—H9A | 0.9600 | C18—H18C | 0.9600 |
C9—H9B | 0.9600 | N1—H1 | 0.86 (6) |
C9—H9C | 0.9600 | N2—Sb1 | 2.414 (5) |
C10—C15 | 1.388 (8) | ||
C6—C1—C2 | 118.6 (5) | C14—C13—C12 | 120.7 (6) |
C6—C1—Sb1 | 118.6 (4) | C14—C13—H13 | 119.6 |
C2—C1—Sb1 | 122.5 (4) | C12—C13—H13 | 119.6 |
C1—C2—C3 | 118.9 (6) | C13—C14—C15 | 119.7 (6) |
C1—C2—C7 | 123.9 (5) | C13—C14—H14 | 120.1 |
C3—C2—C7 | 117.2 (6) | C15—C14—H14 | 120.1 |
C4—C3—C2 | 121.3 (6) | C10—C15—C14 | 121.1 (6) |
C4—C3—H3 | 119.4 | C10—C15—H15 | 119.5 |
C2—C3—H3 | 119.4 | C14—C15—H15 | 119.5 |
C3—C4—C5 | 120.2 (6) | N2—C16—C11 | 109.2 (5) |
C3—C4—H4 | 119.9 | N2—C16—H16A | 109.8 |
C5—C4—H4 | 119.9 | C11—C16—H16A | 109.8 |
C4—C5—C6 | 119.6 (6) | N2—C16—H16B | 109.8 |
C4—C5—H5 | 120.2 | C11—C16—H16B | 109.8 |
C6—C5—H5 | 120.2 | H16A—C16—H16B | 108.3 |
C5—C6—C1 | 121.4 (6) | N2—C17—H17A | 109.5 |
C5—C6—H6 | 119.3 | N2—C17—H17B | 109.5 |
C1—C6—H6 | 119.3 | H17A—C17—H17B | 109.5 |
N1—C7—C2 | 113.1 (5) | N2—C17—H17C | 109.5 |
N1—C7—H7A | 109.0 | H17A—C17—H17C | 109.5 |
C2—C7—H7A | 109.0 | H17B—C17—H17C | 109.5 |
N1—C7—H7B | 109.0 | N2—C18—H18A | 109.5 |
C2—C7—H7B | 109.0 | N2—C18—H18B | 109.5 |
H7A—C7—H7B | 107.8 | H18A—C18—H18B | 109.5 |
N1—C8—H8A | 109.5 | N2—C18—H18C | 109.5 |
N1—C8—H8B | 109.5 | H18A—C18—H18C | 109.5 |
H8A—C8—H8B | 109.5 | H18B—C18—H18C | 109.5 |
N1—C8—H8C | 109.5 | C8—N1—C9 | 112.3 (7) |
H8A—C8—H8C | 109.5 | C8—N1—C7 | 111.3 (5) |
H8B—C8—H8C | 109.5 | C9—N1—C7 | 109.2 (6) |
N1—C9—H9A | 109.5 | C8—N1—H1 | 113 (5) |
N1—C9—H9B | 109.5 | C9—N1—H1 | 103 (5) |
H9A—C9—H9B | 109.5 | C7—N1—H1 | 108 (5) |
N1—C9—H9C | 109.5 | C17—N2—C16 | 110.4 (5) |
H9A—C9—H9C | 109.5 | C17—N2—C18 | 110.0 (5) |
H9B—C9—H9C | 109.5 | C16—N2—C18 | 110.5 (5) |
C15—C10—C11 | 118.0 (5) | C17—N2—Sb1 | 105.0 (4) |
C15—C10—Sb1 | 124.6 (4) | C16—N2—Sb1 | 106.1 (3) |
C11—C10—Sb1 | 116.9 (4) | C18—N2—Sb1 | 114.6 (4) |
C12—C11—C10 | 120.2 (6) | C10—Sb1—C1 | 96.8 (2) |
C12—C11—C16 | 121.2 (6) | C10—Sb1—N2 | 74.76 (19) |
C10—C11—C16 | 118.6 (5) | C1—Sb1—N2 | 88.97 (18) |
C11—C12—C13 | 120.3 (6) | C10—Sb1—Br1 | 93.01 (15) |
C11—C12—H12 | 119.8 | C1—Sb1—Br1 | 87.51 (14) |
C13—C12—H12 | 119.8 | N2—Sb1—Br1 | 166.78 (12) |
C6—C1—C2—C3 | 0.0 (8) | C2—C7—N1—C8 | −66.9 (7) |
Sb1—C1—C2—C3 | 174.4 (4) | C2—C7—N1—C9 | 168.5 (6) |
C6—C1—C2—C7 | 178.3 (6) | C11—C16—N2—C17 | −73.5 (6) |
Sb1—C1—C2—C7 | −7.3 (8) | C11—C16—N2—C18 | 164.6 (5) |
C1—C2—C3—C4 | −0.9 (10) | C11—C16—N2—Sb1 | 39.8 (5) |
C7—C2—C3—C4 | −179.3 (6) | C15—C10—Sb1—C1 | 112.6 (5) |
C2—C3—C4—C5 | 1.5 (11) | C11—C10—Sb1—C1 | −75.7 (4) |
C3—C4—C5—C6 | −1.2 (11) | C15—C10—Sb1—N2 | −160.4 (5) |
C4—C5—C6—C1 | 0.3 (10) | C11—C10—Sb1—N2 | 11.3 (4) |
C2—C1—C6—C5 | 0.3 (9) | C15—C10—Sb1—Br1 | 24.7 (5) |
Sb1—C1—C6—C5 | −174.3 (5) | C11—C10—Sb1—Br1 | −163.6 (4) |
C1—C2—C7—N1 | 112.2 (6) | C6—C1—Sb1—C10 | −22.0 (5) |
C3—C2—C7—N1 | −69.5 (7) | C2—C1—Sb1—C10 | 163.7 (5) |
C15—C10—C11—C12 | −0.9 (8) | C6—C1—Sb1—N2 | −96.5 (5) |
Sb1—C10—C11—C12 | −173.1 (4) | C2—C1—Sb1—N2 | 89.1 (5) |
C15—C10—C11—C16 | −179.4 (5) | C6—C1—Sb1—Br1 | 70.8 (4) |
Sb1—C10—C11—C16 | 8.3 (7) | C2—C1—Sb1—Br1 | −103.6 (4) |
C10—C11—C12—C13 | 1.1 (9) | C17—N2—Sb1—C10 | 88.5 (4) |
C16—C11—C12—C13 | 179.6 (6) | C16—N2—Sb1—C10 | −28.5 (4) |
C11—C12—C13—C14 | −1.1 (10) | C18—N2—Sb1—C10 | −150.6 (5) |
C12—C13—C14—C15 | 0.9 (10) | C17—N2—Sb1—C1 | −174.2 (4) |
C11—C10—C15—C14 | 0.6 (9) | C16—N2—Sb1—C1 | 68.8 (4) |
Sb1—C10—C15—C14 | 172.3 (5) | C18—N2—Sb1—C1 | −53.3 (4) |
C13—C14—C15—C10 | −0.7 (9) | C17—N2—Sb1—Br1 | 111.3 (6) |
C12—C11—C16—N2 | 146.5 (6) | C16—N2—Sb1—Br1 | −5.7 (8) |
C10—C11—C16—N2 | −34.9 (7) | C18—N2—Sb1—Br1 | −127.9 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···Cl2i | 0.86 (6) | 2.39 | 3.220 (7) | 164 |
C12—H12···Cl1ii | 0.93 | 2.91 | 3.827 (6) | 167 |
C14—H14···Cl1iii | 0.93 | 2.86 | 3.766 (8) | 164 |
Symmetry codes: (i) x−1, y, z; (ii) −x+1, y+1/2, −z+1/2; (iii) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | [SbBr0.33Cl0.67(C9H13N)(C9H12N)]Br0.75Cl0.25 |
Mr | 510.07 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 297 |
a, b, c (Å) | 13.8159 (19), 12.6775 (18), 12.5984 (17) |
β (°) | 105.342 (3) |
V (Å3) | 2128.0 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.30 |
Crystal size (mm) | 0.28 × 0.22 × 0.18 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2000) |
Tmin, Tmax | 0.458, 0.588 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15150, 3745, 3298 |
Rint | 0.044 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.112, 1.15 |
No. of reflections | 3745 |
No. of parameters | 216 |
No. of restraints | 2 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 1.47, −0.56 |
Computer programs: SMART (Bruker, 2000), SAINT-Plus (Bruker, 2000), SAINT-Plus (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg, 2006), enCIFer (Allen et al., 2004) and publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···Cl2i | 0.86 (6) | 2.39 | 3.220 (7) | 164 |
C12—H12···Cl1ii | 0.93 | 2.91 | 3.827 (6) | 167 |
C14—H14···Cl1iii | 0.93 | 2.86 | 3.766 (8) | 164 |
Symmetry codes: (i) x−1, y, z; (ii) −x+1, y+1/2, −z+1/2; (iii) −x+1, −y+1, −z. |
Acknowledgements
Financial support from the National University Research Council (Research Project PNII-ID 2052/2009) is greatly appreciated. We also thank the National Center for X-ray Diffraction (Babes-Bolyai University, Cluj-Napoca, Romania) for support of the solid-state structure determinations.
References
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The chlorido/bromido[2-(dimethylaminomethyl)phenyl][2-(dimethylammoniomethyl)-phenyl]antimony chloride/bromide, [C72H100Br4.32Cl3.68N8Sb4], exhibits substitutional disorder of both halogen atoms of the asymmetric unit, however with different occupancies. Thus, the halogen bonded to Sb has 0.67 (4) occupancy for Cl and 0.33 (4) for Br while the anionic halogen shows 0.75 (4) occupancy for Br and 0.25 (4) for Cl.
A hydrogen bond is established between the cation and the halide anion [Cl2/Br2···H1 = 2.39 Å; N1—H1···Cl2/Br2 = 163.6°].
The title compound is isostructural with [{2-(Me2NCH2)C6H4}Sb{C6H4(CH2NHMe2)-2}]+[I]- (Opris et al., 2003), having only a slightly smaller cell volume.
The coordination geometry of the Sb center in the cationic fragment is distorted, peudo-trigonal bipyramidal as a result of the strong intramolecular N→Sb coordination [Sb1—N2 = 2.414 (5) Å] trans to the Sb1—Cl1/Br1 bond [(N2—Sb1—Cl1/Br1 = 166.8 (1)°]. The pendant arm on the second ligand is twisted away from the metal center [non-bonding Sb1–N1 = 4.312 (6) Å] (Emsley, 1994), its N1 atom being protonated (Fig. 1.)
Coordination of N atom induces planar chirality, with the phenyl ring as chiral plane and the nitrogen as pilot atom (IUPAC, 1979). This intramolecular coordination of the nitrogen atom to antimony induces chirality at the Sb centre (IUPAC, 2005). Thus the compound crystallizes as a racemate, i.e. a mixture of (RN2,CSb1) and (SN2,ASb1) isomers (Fig. 2.), with two of each isomers in the unit cell.
Same kind of isomers form ribbon-like all-(RN2,CSb1) and all-(SN2,ASb1) polymers through [H12···.Cl1/Br1 = 2.91 Å] hydrogen bonds (Fig. 3.). These ribbon-like polymers are further associated through hydrogen bonds [H14···.Cl1/Br1 = 2.86 Å] to form a three-dimensional architecture (Fig. 4.)