The title compound, SeLBr [L- = diethyldithiocarbamate, (C2H5)2NCS- 2] is the first example of Se(II) complex featuring a dithiocarbamate and a halide. It was obtained by the reaction of Se(IV)bromide with tetraethylthiuram disulfide in a methanol solution containing hydrobromic acid. The structure determination of the compound shows it to be polymeric with bromine being the bridging ligand. The crystals of SeLBr are monoclinic with a = 10.391(3), b = 8.434(4), c = 12.030(2) Å, β = 108.10(2)°, V = 1002.15 Å3, Z = 4 and space group, P21/n; R = 0.073, Rw = 0.074.

M. Ramakrishna Udupa

Gopalaswamiengar Aravamudan

Maha Seshasayee

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

SYNTHESIS AND STRUCTURE OF THE FIRST MIXED HALIDE-DITHIOCARBAMATE COMPLEX OF SE(II), BROMODIETHYLDITHIO-CARBAMATOSELENIUM(II), [Se{(C2H5)2NCS2}Br]

Phosphorus, Sulfur and Silicon and Related Elements

The title compound, [SeI(C7H14NS2)]n, was prepared by the oxidative displacement of one of the dithiocarbamates in bis(di-n-propyldithiocarbamato)-selenium(II) using iodine. This complex has a polymeric structure, with the central Se atoms bridged by the iodine ions. The geometry around each Se atom is planar trapezoidal (SeS2I2), with Se - I distances of 3.124(2) and 3.232 (I) Å. This is the first example of a mixed iodide-dithiocarbamate complex of selenium(II).

Acta Crystallographica Section C: Crystal Structure Communications

The first mixed iodide-dithiocarbamate complex of selenium(II): Catena-poly[[(di-n-propyldithiocarbamato-S,S′)selenium(II)]-μ-iodo]

The title compound TeIILI [L = diethyl dithiocarbamate, (C2H5)2NCS-2] was synthesized by the reduction of TeIVL2I2 with elemental tellurium. Its structure has been determined and is found to be polymeric, with I being the bridging ligand. The polymeric chain adopts a helical configuration which runs parallel to the c-axis of the tetragonal unit cell. Each tellurium is bonded to two sulphurs of a chelating dithiocarbamate group and to two iodines in a planar configuration. The bond distances of TeS(1), TeS(2), TeI and TeI′ are 2.536(4), 2.483(5), 3.108(1) and 3.279(1) Å, respectively, and the bond angles of ITeS(1), S(1)TeS(2), S(2)TeI′ and I′TeI are 149.6(2), 70.7(2), 151.1(2) and 129.2(2)°, respectively. © 1993.

Polyhedron

Synthesis and crystal structure determination of the novel compound iododiethyldithiocarbamatotellurium(II)

The title compound is a novel mixed ligand and mixed valence complex of tellurium, the crystal structure of which is reported here. The compound crystallizes in the orthorhombic space group, Pca21 with four molecules per unit cell, the dimensions of which are a=15.209(1), b=20.159(2), c=12.453(1) Å. The structure was solved by the heavy-atom method and refined by fullmatrix least-squares method to a final R=0.046 and Rw=0.046 for 3011 unique reflections. The structure could be considered as 1:1 adduct of TeIVL2I2 and TeIILI (L=diisopropyldithiocarbamate). The two tellurium atoms, TeII[Te(1)] and TeIV[Te(2)] display entirely different coordinations and are bridged through iodine I(1) in a symmetrical manner. There is a short Te(1)⋯Te(2) contact distance of 3.542(1) Å. © 1989 Plenum Publishing Corporation.

Journal of Crystallographic and Spectroscopic Research

A novel mixed valence iodide bridged Te(II)-Te(IV) complex featuring diisopropyldithiocarbamate(L) and iodide: ILTeII(I)TeIVL2I

Mixed iodotris(dithiocarbamato)tellurium(iv) complexes TeL3I (where L- = R1R2NCS2-) have been synthesized with the use of the oxidative replacement reaction via the interaction of TeL4 with iodine. Thus, complexes with R1 = R2 = methyl, ethyl, isopropyl, propyl, and with R1R2N = piperidinyl* have been prepared. A single-crystal structure analysis of one of these, iodotris(piperidine dithiocarbamato)tellurium(iv), is also reported. In the structure the tellurium atom exists in a distorted pentagonal-bipyramidal environment with the iodine atom and one sulfur atom occupying axial positions. The axial Te-S bond of 2·555(2) Å is shorter than the remaining Te-S bonds in the complex [range 2·671(2)-2·722(2) Å]. Crystals are monoclinic, space group P21/n with unit cell parameters a 9·891(2), b 18·889(2), c 14·762(2) Å β 98·85(2)° and Z 4. The structure was refined to final R 0·035 and Rw 0·052 for 3283 reflections with I ≥ 1·25σ(I). © 1989, CSIRO. All rights reserved.

Australian Journal of Chemistry

Preparation of iodotris(dithiocarbamato)tellurium(iv) complexes, and crystal structure of iodotris(piperidine-1-carbodithioato)tellurium(iv)

The synthesis, properties, and crystal structure of the unusual mixed-ligand complex TeCl [(HOC2H4)2NCSS] 3-2H2O are described. The complex is monomeric in the crystalline state. The molecular structure shows a highly distorted pen-tagonal-bipyramidal coordination around tellurium featuring both strong and weak Te-S bonds in the equatorial plane and a strong Te-S bond and a rather weak Te-Cl bond in the axial positions. The complex is less stable than tetrakis-(diethyldithiocarbamato)tellurium(IV). The chlorine atom and all the oxygen atoms participate in hydrogen bonding, and the packing arrangement in the unit cell seems to be mainly dictated by the hydrogen-bonding network. © 1983, American Chemical Society. All rights reserved.

Inorganic Chemistry

Crystal and Molecular Structure of Chlorotris[bis(2-hydroxyethyl)dithiocarbamato]tellurium(IV) Dihydrate

Novel complexes of 2,2′-iminodiethanoldithiocarbamate (DEADTC-) with Te(IV), Te(II) and Se(II) having the composition Te(DEADTC)4, Te(DEADTC)2I2, Te(DEADTC)3I, Te(DEADTC)2 and Se(DEADTC)2 were isolated and characterised by X-ray, magnetic, spectral (UV, IR) and conductance and molecular weight measurements. 2,2′-Iminodiethanoldithiocarbamate is shown to be weaker in its ligation behaviour than diethyldithiocarbamate. © 1978.

Journal	Data powered by TypesetPhosphorus, Sulfur and Silicon and Related Elements
Publisher	Data powered by TypesetTaylor and Francis Ltd.
ISSN	10426507
Open Access	No