Home Crystal structure of (N-n-butyl, N-methyl-dithiocarbamato-κ2 S,S′)-chlorido-dimethyl-tin(IV), C8H18ClNS2Sn
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Crystal structure of (N-n-butyl, N-methyl-dithiocarbamato-κ2 S,S′)-chlorido-dimethyl-tin(IV), C8H18ClNS2Sn

  • See Mun Lee , Kong Mun Lo and Edward R.T. Tiekink ORCID logo EMAIL logo
Published/Copyright: September 10, 2019

Abstract

C8H18ClNS2Sn, triclinic, P1̄ (no. 2), a = 6.4399(2) Å, b = 9.6430(3) Å, c = 11.6944(1) Å, α = 91.966(2)°, β = 101.821(2)°, γ = 105.391(3)°, V = 682.30(3) Å3, Z = 2, Rgt(F) = 0.0227, wRref(F2) = 0.0609, T = 100 K.

CCDC no.: 1946282

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:0.08 × 0.06 × 0.03 mm
Wavelength:Cu Kα radiation (1.54178 Å)
μ:19.3 mm−1
Diffractometer, scan mode:XtaLAB Synergy, ω
θmax, completeness:67.0°, >99%
N(hkl)measured, N(hkl)unique, Rint:16394, 2444, 0.042
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 2399
N(param)refined:122
Programs:CrysAlisPRO [1], SHELX [2], [3], WinGX/ORTEP [4]
Table 2:

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

AtomxyzUiso*/Ueq
Sn0.88424(2)0.71732(2)0.84888(2)0.01924(9)
Cl10.84361(11)0.93203(7)0.74494(6)0.03091(17)
S10.58280(10)0.57512(6)0.68894(5)0.02078(15)
S20.79477(11)0.43192(7)0.87990(6)0.02390(15)
N10.4509(4)0.2927(2)0.70830(19)0.0216(5)
C11.2139(5)0.7382(3)0.8331(3)0.0295(6)
H1A1.30270.83850.85590.044*
H1B1.21420.71120.75160.044*
H1C1.27670.67440.88450.044*
C20.7909(5)0.7750(3)1.0032(3)0.0307(6)
H2A0.92260.80931.06700.046*
H2B0.68890.69051.02510.046*
H2C0.71790.85200.98890.046*
C30.5936(4)0.4163(3)0.7553(2)0.0200(5)
C40.4537(5)0.1557(3)0.7590(3)0.0272(6)
H4A0.53280.10460.71720.041*
H4B0.30170.09580.75140.041*
H4C0.52840.17550.84210.041*
C50.2719(5)0.2839(3)0.6031(2)0.0253(6)
H5A0.22940.18650.56050.030*
H5B0.32730.35530.54980.030*
C60.0692(5)0.3131(3)0.6362(3)0.0268(6)
H6A0.11260.41060.67870.032*
H6B0.01550.24210.69010.032*
C7−0.1193(5)0.3043(3)0.5298(3)0.0294(6)
H7A−0.23060.34490.55480.035*
H7B−0.06000.36450.47060.035*
C8−0.2318(5)0.1516(3)0.4733(3)0.0344(7)
H8A−0.12940.11630.43650.052*
H8B−0.36320.15120.41350.052*
H8C−0.27550.08860.53330.052*

Source of material

All chemicals and solvents were used as purchased without purification. The melting point was determined using a Mel-temp II digital melting point apparatus and was uncorrected. The solid-state IR spectrum was obtained on a Bruker Vertex 70v FTIR Spectrometer from 4000 to 400 cm−1. The 1H and 13C{1H} NMR spectra were recorded at room temperature in CDCl3 solution on a Bruker Ascend 400 MHz NMR spectrometer with chemical shifts relative to tetramethylsilane.

The dithiocarbamate ligand was prepared in situ (acetone) from the reaction of CS2 (Merck 0.25 mmol) with n-butylmethylamine (Merck, 0.25 mmol) and NaOH (0.02 mL; 50% w/v); CS2 was added dropwise into the acetone solution (10 mL). The resulting mixture was kept at 273 K for 0.5 h. Dimethyltin dichloride (Merck, 0.25 mmol, 0.05 g) in acetone (10 mL) was added to the prepared sodium n-butyl(methyl)dithiocarbamate. The resulting mixture was stirred and refluxed for 2 h. The filtrate was evaporated slowly until a white precipitate was formed. The precipitate was recrystallized from acetone-methanol by slow evaporation to yield colourless crystals. Yield: 0.042 g (48.5%). M.pt: 369–370 K. IR (cm−1) 1466 (m) ν(CN), 1071 (s) ν(CS), 749 (m) ν(CS), 553 (m) ν(SnS). 1H NMR (CDCl3, ppm): 0.97 (6H, 2J(119Sn1H) = 74 Hz, CH3), 1.19 (3H, CH3) 1.28–1.73 (m, 4H, CH2CH2), 3.35 (3H, N—CH3), 3.70–3.74 (m, 2H, N—CH2). 13C{1H} NMR (CDCl3, ppm): 9.9 (6H, 2J(119Sn13C) = 548 Hz, CH3), 13.7 (Bu—CH3), 19.9, 28.8 (Bu—CH2), 42.8 (NCH2), 58.0 (NCH3), 197.8 (CS2).

Experimental details

The C-bound H atoms were geometrically placed (C—H = 0.98–0.99 Å) and refined as riding with Uiso(H) = 1.2Ueq(C).

Comment

The crystal structure determination was reported recently for the methyl ester of the dithiocarbamate ligand featured in the title compound, namely MeSC(=S)N(Me)n-Bu [5]. Herein, the isolation and crystallographic analysis of chlorido-dimethyl-tin(IV) ester of this dithiocarbamate ligand, Me2Sn[S2CN(Me)n-Bu]Cl, (I), is described in continuation of studies of related compounds [6]. Organotin compounds related to Me2Sn[S2CN(Me)n-Bu]Cl have been investigated for their biological potential pharmaceutical applications [7] as well as for their suitability as synthetic precursors for the generation of tin sulphide nanomaterials via chemical vapour deposition and related techniques [7], [8].

The molecular structure of (I) is shown in the figure (70% displacement ellipsoids). The tin atom exists within a C2ClS2 donor set defined by an asymmetrically coordinating dithiocarbamate ligand, the chloride atom and two methyl-carbon atoms. The Sn—S1 [2.4638(6) Å] and Sn—S2 [2.7111(7) Å] bond lengths differ by approximately 0.25 Å, and consistent with this asymmetry is the systematic variation in the C3—S1, S2 bonds. Thus, the less tightly bound S2 atom forms a shorter C3—S2 bond [1.713(3) Å] than the more tightly bound S1 atom [1.751(3) Å], consistent with some double bond character in the former. The C3—S1, S2 bond lengths in (I) are intermediate between the formerly singly [1.7662(17) Å] and doubly [1.6590(18) Å] bonded distances in the MeSC(=S)N(Me)n-Bu ester [5]. The above variations in C—S bond lengths can also be compared with the experimental equivalence of the C—bonds, i.e. 1.7192(14) and C1—S2 = 1.7249(14) Å, in the recently determined salt of S2CN(CH2CH2)2NPh [9]. A consistent feature in the organotin compound, (I), and in the cited ester [5] and salt [8] is the short C3—N bond, i.e. 1.317(4), 1.351(2) and 1.3419(18) Å, respectively, all indicative of significant double bond character in this bond and a major contribution of the 2−S2C= N+RR′ canonical form to the overall electronic structure of the respective dithiocarbamate chromophore. The C3S2 donor set defines a highly distorted geometry. This is quantified in the value of τ of 0.51 which is almost exactly intermediate between the values for ideal trigonal-bipyramidal [1.0] and square-pyramidal [0.0] [10].

The molecular packing is largely devoid of directional interactions between molecules. A weak secondary Sn⋯S contact of 3.9510(7) Å is noted to occur between the Sn and S2i atoms (symmetry operation (i) 2 − x, 1 − y, 2 − z) which is marginally less than the sum of the van der Waals radii for these atoms of 3.97 Å [11]. Secondary bonding interactions are important in dithiocarbamate compounds, including organotin dithiocarbamate compounds [12], [13], [14]. In the present case, the Sn⋯S interactions lead to a supramolecular dimer. The dimers are linked into a linear supramolecular chain along the b-axis direction by methyl-C—H⋯Cl interactions [C4—H4a⋯Clii: H4a⋯Clii = 2.90 Å, C4—H4a⋯Clii = 3.742(4) Å with angle at H4a = 144° for (ii) x, −1 + y, z].

Finally, the calculated Hirshfeld surfaces as well as the two-dimensional fingerprint plots (full and delineated into individual contacts) were evaluated for the most significant percentage contributors to the surface. This was accomplished using literature protocols [15] and Crystal Explorer 17 [16]. Given the lack of directional interactions in the crystal, it is not surprising that the most significant contributions to the surface are from H⋯H contacts, at 64.3%. The next three contacts, i.e. Cl⋯H/H⋯Cl [15.7%], S⋯H/H⋯S [15.2%] and C⋯H/H⋯C [2.6%], account for the bulk of the remaining contacts on the calculated Hirshfeld surface.

Acknowledgements

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: 2019-07-17
Accepted: 2019-08-15
Published Online: 2019-09-10
Published in Print: 2019-11-26

©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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  62. Crystal structure of chlorido-dimethyl-(phenylpiperazine-1-carbodithioato-κ2S,S′)tin(IV), C13H19ClN2S2Sn
  63. Crystal structure of (N-n-butyl, N-methyl-dithiocarbamato-κ2 S,S′)-chlorido-dimethyl-tin(IV), C8H18ClNS2Sn
  64. Crystal structure of (2,2′-bipyridyl)bis(4-bromobenzyl)dibromidotin(IV), C24H20Br4N2Sn
  65. Crystal structure of (2,2′-bipyridyl)bis(4-chlorobenzyl)dichloridotin(IV), C24H20Cl4N2Sn
  66. Crystal structure of N-methyl-N-phenyl(methylsulfanyl)carbothioamide, C9H11NS2
  67. Crystal structure of 4-phenylpiperazin-1-ium (4-phenylpiperazin-1-yl)carbothioylsulfanide, [C10H15N2][C11H13N2S2]
  68. Crystal structure of catena-{di-aqua-sodium [n-butyl(methyl)carbamothioyl]sulfanide}n, [C6H16NNaO2S2]n
  69. Crystal structure of (2-([1,1-bis(hydroxymethyl)-2-oxyethyl]iminomethyl)-5-(n-decyl)phenolato)-dimethyl-tin(IV), C23H39NO5Sn
  70. Crystal structure of 4-chloro-N′-[(1E)-(3-ethoxy-2-hydroxyphenyl)methylidene]benzohydrazide – a Z′ = 3 structure, C16H15ClN2O3
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