Home Crystal structure of (dibenzyl sulphoxide-κO)dibromido-bis(4-bromobenzyl-κC)tin(IV), C28H26Br4OSSn
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Crystal structure of (dibenzyl sulphoxide-κO)dibromido-bis(4-bromobenzyl-κC)tin(IV), C28H26Br4OSSn

  • See Mun Lee , Kong Mun Lo and Edward R.T. Tiekink ORCID logo EMAIL logo
Published/Copyright: September 9, 2019

Abstract

C28H26Br4OSSn, monoclinic, Cm (no. 8), a = 8.4055(1) Å, b = 26.9988(3) Å, c = 6.4207(1) Å, β = 98.164(1)°, V = 1442.34(3) Å3, Z = 2, Rgt(F) = 0.0174, wRref(F2) = 0.0454, T = 100(2) K.

CCDC no.: 1949173

The molecular structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Colourless prism
Size:0.13 × 0.07 × 0.03 mm
Wavelength:Cu Kα radiation (1.54184 Å)
μ:14.4 mm−1
Diffractometer, scan mode:XtaLAB Synergy, ω
θmax, completeness:67.0°, >99%
N(hkl)measured, N(hkl)unique, Rint:17692, 2510, 0.040
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 2498
N(param)refined:166
Programs:CrysAlisPRO [1], SHELX [2], [3], WinGX/ORTEP [4]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

AtomxyzUiso*/Ueq
Sn0.46363(3)0.50000.38467(4)0.01593(10)
Br10.41540(7)0.50000.76184(9)0.02340(15)
Br20.15628(7)0.50000.24379(8)0.01954(14)
Br30.02290(6)0.25850(2)0.21959(8)0.02924(13)
S10.84061(18)0.50000.7253(2)0.0188(3)
O10.7397(5)0.50000.5078(7)0.0225(9)
C10.5227(5)0.42751(15)0.2760(7)0.0214(9)
H1A0.55400.43120.13390.026*
H1B0.61830.41530.36990.026*
C20.3954(5)0.38851(14)0.2647(7)0.0185(8)
C30.3060(6)0.37553(15)0.0714(7)0.0207(8)
H30.32160.3932−0.05210.025*
C40.1948(5)0.33718(15)0.0582(7)0.0213(9)
H40.13510.3283−0.07340.026*
C50.1723(5)0.31206(15)0.2396(7)0.0218(9)
C60.2572(6)0.32443(16)0.4326(7)0.0245(9)
H60.24010.30700.55590.029*
C70.3677(6)0.36280(16)0.4433(7)0.0235(9)
H70.42580.37170.57580.028*
C80.9797(5)0.55141(17)0.7211(7)0.0207(9)
H8A1.06870.54830.83910.025*
H8B1.02600.55120.58760.025*
C90.8897(5)0.59888(15)0.7409(7)0.0202(8)
C100.8210(6)0.60822(17)0.9231(7)0.0237(9)
H100.83200.58461.03390.028*
C110.7373(6)0.65153(18)0.9427(8)0.0282(10)
H110.68940.65751.06580.034*
C120.7232(6)0.68634(18)0.7826(9)0.0298(10)
H120.66640.71630.79690.036*
C130.7912(7)0.67772(17)0.6023(8)0.0292(10)
H130.78110.70160.49250.035*
C140.8747(6)0.63376(17)0.5826(7)0.0242(9)
H140.92180.62780.45890.029*

Source of material

The melting point of the compound was measured on a Electrothermal digital melting point apparatus and was uncorrected. The elemental analysis was performed on a Perkin-Elmer EA2400 CHN analyser. The IR spectrum was recorded using a Perkin-Elmer RX1 spectrophotometer as a Nujol mull between KBr plates from 4000 to 400 cm−1. The 1H and 13C{1H} NMR spectra were recorded in CDCl3 solution on a Bruker AVN FT-NMR 400 MHz NMR spectrometer with chemical shifts relative to tetramethylsilane.

Di(4-bromobenzyl)tin dibromide was synthesized by the direct reaction of 4-bromobenzyl bromide (Merck) and metallic tin powder (Merck) in toluene according to a literature procedure [5]. Di(4-bromobenzyl)tin dibromide (0.62 g, 1 mmol) and dibenzyl sulfoxide (Aldrich, 0.23 g, 1.0 mmol) were dissolved in chloroform (25 mL) and the mixture was refluxed for 2 h. After filtration, the filtrate was evaporated slowly until colourless crystals were formed. The crystals were filtered, washed with minimum amount of hexane and air-dried. Yield: 0.34 g (40.1%). M.pt: 418–420 K. Anal. Calc. for C28H26Br4OSSn: C 39.62; H 3.09%. Found: C 39.10; H 2.81%. IR (cm−1) 980 (m) ν(S—O), 501 (w) ν(Sn—O). 1H NMR (CDCl3, ppm): δ 3.11 (m, 4H, CH2), 3.92 (s, 4H, SCH2), 6.83–7.18 (m, 8H, BrPh-H), 7.28–7.40 (m, 10H, Ph-H). 13C{1H} NMR (CDCl3, ppm): 35.4 (CH2), 56.2 (SCH2), 119.7, 128.4, 128.8, 121.2, 129.8, 130.2, 131.8, 135.1 (Ph-H).

Experimental details

The H atoms were geometrically placed (C—H = 0.95–0.99 Å) and refined as riding with Uiso(H) = 1.2Ueq(C). The absolute structure was determined based on differences in Friedel pairs.

Comment

Recently, the X-ray crystal structure determination of (4-bromobenzyl)2SnBr2, the organotin precursor in the title compound, (4-bromobenzyl)2SnBr2[O= S(benzyl)2], hereafter (I), became available [6]. In continuation of structural studies of diorgano sulphoxide adducts of organotin derivatives [7], [8], compound (I), was investigated by X-ray crystallography.

The molecular structure of (I) is shown in the figure (70% displacement ellipsoids; unlabelled residues are related by the symmetry operation (i) x, 1 − y, z) and has crystallographic mirror symmetry with the Sn, Br1, Br2, S1 and O1 atoms lying on the mirror plane. The molecule features a penta-coordinated tin centre within a C2Br2O donor set defined by two methylene-carbon, two bromide and sulphoxide-oxygen atoms. The coordination geometry approximates a trigonal-bipyramid with the axial positions occupied by the Br2 and O1 atoms [Br2—Sn—O1 = 179.47(10)°]. This description is quantified in the value of τ = 0.82, compared to τ = 1.0 for an ideal trigonal-bipyramid as opposed to τ = 0.0 for an ideal square-pyramid [9], [10]. There are systematic differences in the magnitudes of the Sn—Br bond lengths relating to their positions in the coordination polyhedron. The axially-bound Br2 atom forms a longer bond [2.6131(7) Å] compared with the equatorially-bound Br1 atom [2.5115(6) Å]. Compared with the Sn—Br bond length [2.5143(2) Å] obtained for 2-fold symmetric (4-bromobenzyl)2SnBr2 [6], only the Sn—Br2 bond length has elongated despite the increase in the coordination number about the tin atom. The sulphoxide-benzyl rings are folded to be disposed over the bromobenzyl rings with the closest intramolecular contact between the residues being a bromobenzyl-methylene-C—H⋯C(benzyl-phenyl) contact [C1—-H1b⋯C14i = 2.74 Å].

There are four notable points of contact between residues in the molecular packing of (I). Thus, a benzyl-C—H⋯Br(tin-bound) contact [C8—H8a⋯Br2ii: H8a⋯Br2ii = 2.91 Å, C8⋯Br2ii = 3.739(4) Å with angle at H8a = 142° for (ii) 1 + x, y, 1 + z] link molecules into a linear, supramolecular chain along [1 0 1]; from symmetry, each molecule participates in four such contacts. Weak bromobenzyl-phenyl-C—H⋯π(benzyl-phenyl) contacts [C4—H4⋯Cg(C9–C14)iii: H4⋯Cg(C9–C14)iii = 2.92 Å, C4⋯Cg(C9–C14)iii = 3.579(5) Å with angle at H4 = 127° for (iii) −1 + x, 1 − y, −1 + z] contribute to the stability of the chain. The connections between the chains are of the type end-on, bromobenzyl-C—Br⋯π(benzyl) [C5—Br3⋯Cg(C2–C7)iv: Br3⋯Cg(C2—C7)iv = 3.5846(18) Å, C5⋯Cg(C2—C7)iv = 5.477(4) Å with angle at Br3 = 171.00(14)° (iv) −1/2 + x, 1/2 − y, z] and, again, there are four such contacts per molecule, so a three-dimensional architecture ensues. The fourth point of contact between atoms is a secondary Sn⋯Br interaction [Sn⋯Br1v = 3.9618(6) Å compared with the sum of the van der Waals radii = 4.02° for (v) x, y, −1 + z] known to be important in crystals of main group elements [11], [12].

A further analysis of the molecular packing was conducted by calculating the Hirshfeld surfaces along with the two-dimensional fingerprint plots (overall and decomposed into individual contacts types) to determine the major types of contacts contributing to the surface. This was performed with Crystal Explorer 17 [13] in accord with established procedures [14]. There are four prominent contributions to the Hirshfeld surface that account for over 97% of all contacts. These are H⋯H [42.4%], Br⋯H/H⋯Br [32.5%], C⋯H/H⋯C [15.4%] and Br⋯C/C⋯Br [6.8%]. The aforementioned Sn⋯Br secondary bonding interaction contributes a mere 0.1% to the overall surface.

Funding source: Sunway University Sdn Bhd

Award Identifier / Grant number: STR-RCTR-RCCM-001-2019

Funding statement: Sunway University Sdn Bhd is thanked for financial support of this work through Grant no. STR-RCTR-RCCM-001-2019.

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Received: 2019-07-29
Accepted: 2019-08-25
Published Online: 2019-09-09
Published in Print: 2019-12-18

©2019 See Mun Lee et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 Public License.

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  66. Crystal structure of bis(acetylacetonato-κ2O,O′)-(ethanolamine-κ2N,O)copper(II), C14H25CuNO5
  67. Crystal structure of chlorido-diphenyl-(isopropyl(propyl)carbamodithioato-κ2S,S′)tin(IV), C19H24ClNS2Sn
  68. The crystal structure of bis(imidazole-1-yl)methane monohydrate, C7H10N4O
  69. The crystal structure of bis(4-nitroimidazole-1-1yl)methane, C7H6N6O4
  70. Crystal structure of di(naphthalen-2-yl)sulfane, C20H14S
  71. Crystal structure of 3-acetyl-6-bromo-4-hydroxy-2H-chromen-2-one, C11H7BrO4
  72. Crystal structure of N′2,N′6-bis((E)-1-(pyrazin-2-yl)ethylidene)pyridine-2,6-dicarbohydrazide — methanol (1/2), C21H25N9O4
  73. The crystal structure of 3-nitro-4-(p-tolylamino)-2H-chromen-2-one, C16H12N2O4
  74. The crystal structure of 1,2-bis((4-methoxyphenyl)ethynyl)benzene, C24H18O2
  75. Crystal structure of a low-temperature (100 K) polymorph of catena-poly[(μ2-4,4′-bipyridine-κ2N,N′)-bis(O,O′-diethyldithiophosphato-κ1S)zinc(II)], C18H28N2O4P2S4Zn
  76. The pseudosymmetric low temperature polymorph of catena-poly[(μ2-4,4′-bipyridyl-κN,N′)-bis(O,O′-diethyldithiophosphato-κS)-cadmium(II)], {C18H28CdN2O4P2S4}n
  77. Crystal structure of 3-iodophthalic acid, C8H5IO4
  78. The crystal structure of tert-butyl (tert-butoxy(oxo)methyl)(5-bromo-2-fluorophenyl)carbamate, C16H21BrFNO4
  79. The crystal structure of bis(μ2-5,7-dichloroquinolin-8-olato-κ3N,O:O)-tetrakis(5,7-dichloroquinolin-8-olato-κ2N,O)bis(methanol-κ1O)dieuropium(III) — toluene (1/1), C63H39Cl12Eu2N6O8
  80. Crystal structure of dichlorido-(N′-(1-(3-ethylpyrazin-2-yl)ethylidene)-4-methoxybenzohydrazide-κ3N,N′,O)cadmium(II), C16H18N4O2Cl2Cd
  81. A redetermination of the crystal structure of catena-poly[(bis(O,O′-isopropyl dithiophosphato-κ2S,S′)-(μ2-1,2-bis(3-pyridylmethylene)hydrazine-κ2N,N′)cadmium(II)], {C24H38CdN4O4P2S4}n
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