Home Crystal structure of bis(μ2-di-n-butyldithiocarbamato-κ3S,S′:S;κ3S:S:S′)-hexacarbonyl-di-rhenium(I), C24H36N2O6Re2
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Crystal structure of bis(μ2-di-n-butyldithiocarbamato-κ3S,S′:S3S:S:S′)-hexacarbonyl-di-rhenium(I), C24H36N2O6Re2

  • Peter J. Heard , Nathan R. Halcovitch , Lee See Mun and Edward R.T. Tiekink EMAIL logo
Published/Copyright: March 16, 2018

Abstract

C24H36N2O6Re2, triclinic, P1̅ (no. 2), a = 10.3013(2) Å, b = 11.3471(2) Å, c = 14.5967(3) Å, α = 72.540(2)°, β = 73.074(2)°, γ = 85.369(2)°, V = 1557.05(6) Å3, Z = 2, Rgt(F) = 0.0214, wRref(F2) = 0.0466, T = 100(2) K.

CCDC no.: 1825597

The crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Cube, colourless
Size:0.08 × 0.06 × 0.06 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:8.07 mm−1
Diffractometer, scan mode:Bruker SMART, φ and ω-scans
θmax, completeness:28.7°, > 88% (up to 25.2°, > 99%)
N(hkl)measured, N(hkl)unique, Rint:30121, 7111, 0.026
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 6456
N(param)refined:347
Programs:CrysAlisPRO [1], SHELX [2, 3], WinGX and ORTEP [4]
Table 2:

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

AtomxyzUiso*/Ueq
Re10.40511(2)0.27796(2)0.19086(2)0.01285(4)
Re20.39780(2)0.24905(2)0.45674(2)0.01121(4)
S10.48696(9)0.49522(8)0.14289(6)0.01645(17)
S20.28273(8)0.37480(8)0.32572(6)0.01362(16)
S30.59125(9)0.39904(8)0.38438(6)0.01580(17)
S40.55783(8)0.19842(8)0.30727(6)0.01288(16)
O10.2678(3)0.0216(3)0.2747(2)0.0311(7)
O20.6050(3)0.1905(3)0.02274(19)0.0258(6)
O30.1977(3)0.3460(3)0.0705(2)0.0265(6)
O40.1866(3)0.0414(3)0.5203(2)0.0265(6)
O50.5463(3)0.0839(2)0.60121(19)0.0242(6)
O60.2157(3)0.3495(2)0.62371(18)0.0203(5)
N10.3637(3)0.6121(3)0.2807(2)0.0149(6)
N20.7855(3)0.3384(3)0.2362(2)0.0138(6)
C10.3792(3)0.5105(3)0.2529(2)0.0142(7)
C20.4341(4)0.7281(3)0.2146(3)0.0180(7)
H2A0.37550.79910.22530.022*
H2B0.45130.72960.14390.022*
C30.5676(4)0.7403(3)0.2353(3)0.0201(8)
H3A0.62900.67350.21840.024*
H3B0.55090.72990.30760.024*
C40.6373(4)0.8657(4)0.1751(3)0.0244(8)
H4A0.57520.93220.19190.029*
H4B0.71960.87110.19570.029*
C50.6775(4)0.8877(4)0.0623(3)0.0284(9)
H5A0.72930.81690.04570.043*
H5B0.73350.96270.02920.043*
H5C0.59570.89770.03950.043*
C60.2783(4)0.6156(3)0.3802(3)0.0177(7)
H6A0.32190.67020.40440.021*
H6B0.27270.53150.42740.021*
C70.1358(4)0.6614(4)0.3803(3)0.0213(8)
H7A0.09000.60480.35930.026*
H7B0.14080.74420.33140.026*
C80.0520(4)0.6689(4)0.4840(3)0.0251(8)
H8A−0.04440.68050.48460.030*
H8B0.05910.58910.53400.030*
C90.0947(4)0.7720(4)0.5159(3)0.0291(9)
H9A0.18580.75540.52470.044*
H9B0.03050.77640.57920.044*
H9C0.09530.85080.46420.044*
C100.6625(4)0.3201(3)0.2991(2)0.0157(7)
C110.8397(4)0.2618(3)0.1682(3)0.0171(7)
H11A0.90880.31020.10860.021*
H11B0.76530.24130.14520.021*
C120.9036(4)0.1423(4)0.2168(3)0.0230(8)
H12A0.83500.09290.27610.028*
H12B0.97880.16190.23940.028*
C130.9577(4)0.0672(4)0.1425(3)0.0296(9)
H13A0.88350.05380.11620.036*
H13B1.03010.11540.08540.036*
C141.0137(5)−0.0562(4)0.1881(4)0.0402(12)
H14A1.0891−0.04360.21250.060*
H14B1.0463−0.10030.13740.060*
H14C0.9422−0.10500.24400.060*
C150.8773(4)0.4344(3)0.2320(3)0.0190(8)
H15A0.96810.39860.23240.023*
H15B0.84190.46400.29190.023*
C160.8899(4)0.5430(3)0.1379(3)0.0203(8)
H16A0.93370.51440.07840.024*
H16B0.79790.57230.13410.024*
C170.9720(4)0.6503(4)0.1355(3)0.0239(8)
H17A0.96510.72190.07830.029*
H17B0.93190.67450.19760.029*
C181.1196(4)0.6209(4)0.1263(3)0.0282(9)
H18A1.12790.55540.18580.042*
H18B1.16770.69500.12040.042*
H18C1.15930.59310.06670.042*
C190.3210(4)0.1160(4)0.2455(3)0.0206(8)
C200.5285(4)0.2235(3)0.0854(3)0.0193(8)
C210.2773(4)0.3225(3)0.1153(3)0.0195(8)
C220.2655(4)0.1196(3)0.4947(3)0.0179(7)
C230.4894(4)0.1455(3)0.5475(2)0.0152(7)
C240.2852(3)0.3126(3)0.5615(2)0.0143(7)

Source of materials

Bromopentacarbonylrhenium was prepared from a 1:1 molar ratio of Re2(CO)10 (Alfa Aesar) and Br2 (Panreac) in dichloromethane at 0°. White solids were obtained from the slow evaporation of the solvent. The solids were recrystallized in acetone before use. The dithiocarbamate ligand was prepared in situ (acetone) from the reaction of CS2 (Panreac 0.25 mmol) with di-n-butylamine (Merck, 0.25 mmol) and NaOH (0.02 mL; 50% w/v); CS2 was added dropwise into the acetone solution (15 mL). The resulting mixture solution was kept at 273 K for 0.5 h. Bromopentacarbonylrhenium(I) (0.25 mmol) in acetone (10 mL) was added into the solution and the resulting mixture was stirred for 2.5 h. The filtrate was evaporated until a precipitate was obtained. The precipitate was washed with n-hexane and recrystallised from its dichloromethane solution. Colourless blocks were obtained from the slow evaporation of the solvent. Yield: 61%. M.p: 450 K. IR (KBr, cm−1): 2031 (s), 2012 (s), 1888 (vs). 1H NMR (CDCl3): 0.96–1.04 (m, 6H, CH3), 1.33–1.49 (m, 4H, CH2—CH3), 1.66–1.89 (m, 4H, −CH2CH2N), 3.68–3.82 (m, 4H, NCH2−).

Experimental details

The C-bound H atoms were geometrically placed (C—H = 0.98–0.99 Å) and refined as riding with Uiso(H) = 1.2–1.5Ueq(C). Owing to poor agreement, the (6 3 3) reflection was omitted from the final cycles of refinement. The maximum and minimum residual electron density peaks of 1.57 and 1.06 e Å−3, respectively, were located 0.97 and 0.67 Å from the S3 and Re1 atoms.

Discussion

The biological efficacy of metal dithiocarbamates (S2CNRR′) is well known and has been the subject of a review [5]. The heavy element, rhenium, continues to attract interest as both putative therapeutic agents as well as radiopharmaceuticals and dithiocarbamates feature in these investigations [6], [7], [8]. In continuation of studies into the biological efficacy of heavy metal dithiocarbamate compounds as anti-cancer, e.g. bismuth [9], and anti-microbial, e.g. gold [10], agents, attention has been directed towards rhenium and it was in this context that the title complex was studied.

The binuclear complex of {Re[S2CN(n-Bu)2](CO)3}2 is shown in the figure (50% displacement ellipsoids) and features two μ2-bridging dithiocarbamate ligands, each chelating one rhenium(I) atom and simultaneously bonding to the other via one sulphur atom. The Re—S bond lengths formed by the chelating ligands span the narrow range 2.4953(9) to 2.5125(8) Å and the bridging Re—S bond lengths are considerably longer at 2.5659(8) Å (Re1—S4) and 2.5511(8) Å (Re2—S2). This disparity in Re—S bond lengths implies the central Re2S2 core approximates a rectangle. Each rhenium atom is also coordinated by three terminally bound carbonyl groups which occupy facial positions in the approximately octahedral C3S3 donor set. Globally, the dithiocarbamate ligands are syn, lying to the same side of the central Re2S2 core.

The structure resembles closely that reported for the diethyldithiocarbamate analogue [11], i.e. with a syn-disposition of dithiocarbamate ligands and fac-C3S3 coordination geometries. The main difference relates to the latter conforming to crystallographic 2-fold symmetry; the Re—S (chelating) bond lengths are 2.4813(15) and 2.5050(15) Å and the bridging distance is 2.5475(15) Å.

Acknowledgements

Sunway University is thanked for support of biological and crystal engineering studies of metal dithiocarbamates.

References

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Received: 2017-11-27
Accepted: 2018-2-24
Published Online: 2018-3-16
Published in Print: 2018-5-24

©2018 Peter J. Heard et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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  54. Crystal structure of bis(μ2-diethyldithiocarbamato-κ3S,S′:S′)-bis(tricyclohexylphosphane-κP)dicopper(I), C46H86Cu2N2P2S4
  55. Crystal structure of N-(3-chlorophenyl)ethoxycarbothioamide, C9H10ClNOS
  56. Crystal structure of bis(μ2-pyrrolidine-1-carbodithioato-κ3S,S′:S;κ3S:S:S′)-bis(tricyclohexylphosphane-P)-di-copper(I), C46H82Cu2N2P2S4
  57. Crystal structure of N-(2-chlorophenyl)methoxycarbothioamide, C8H8ClNOS
  58. Crystal structure of chlorido-methanol-(N-(2-(oxy)-3-methoxybenzylidene)pyridine-4-carbohydrazonato-κ3O,N,O′)-(4-methylphenyl)methyl-tin(IV), C23H24ClN3O4Sn
  59. Crystal structure of N-(3-chlorophenyl)(propan-2-yloxy)carbothioamide, C10H12ClNOS
  60. Crystal structure of 1-[(Z)-[4-(4-methoxyphenyl)butan-2-ylidene]amino]-3-phenylurea, C18H21N3O2
  61. A triclinic polymorph of bis(μ-N,N-bis(2-hydroxyethyl)dithiocarbamato-κ3S,S′:S′) bis(N,N-bis(2-hydroxyethyl)dithiocarbamato-κ2S:S′)zinc(II), C20H40N4O8S8Zn2
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