A novel mixed ligand Te(IV) complex comprising three halides and a dithiocarbamate; synthesis and crystal structure of triiododiethyldithiocarbamatotellurium(IV), Te{(C2H5)2NCS2}I3
TL;DR: The title compound TeIVLI3 [L = diethyldithiocarbamate, (C2H5)2NCS−2] as discussed by the authors is the first example of a mixed halide-dithIoC complex of TeIV with halide to a dithIocaramate ratio of 3:1.
About: This article is published in Polyhedron.The article was published on 1996-05-01. It has received 5 citations till now. The article focuses on the topics: Pentagonal bipyramidal molecular geometry & Bridging ligand.
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TL;DR: In this article, a survey of the literature of tellurium(II)/(IV) 1,1-dithiolates (dithiocarbamate, xanthate, dithiophosphate, or dithIophosphinate) is presented.
44 citations
TL;DR: The existence of correlations between the two bond distances and more importantly the linearity observed for all these systems, independently on the degree of their asymmetry, support the state of hypervalency of the central atom.
Abstract: The 3 centre-4 electrons (3c-4e) and the donor/acceptor or charge-transfer models for the description of the chemical bond in linear three-body systems, such as I3– and related electron-rich (22 shell electrons) systems, are comparatively discussed on the grounds of structural data from a search of the Cambridge Structural Database (CSD). Both models account for a total bond order of 1 in these systems, and while the former fits better symmetric systems, the latter describes better strongly asymmetric situations. The 3c-4e MO scheme shows that any linear system formed by three aligned closed-shell species (24 shell electrons overall) has reason to exist provided that two electrons are removed from it to afford a 22 shell electrons three-body system: all combinations of three closed-shell halides and/or chalcogenides are considered here. A survey of the literature shows that most of these three-body systems exist. With some exceptions, their structural features vary continuously from the symmetric situation showing two equal bonds to very asymmetric situations in which one bond approaches to the value corresponding to a single bond and the second one to the sum of the van der Waals radii of the involved atoms. This indicates that the potential energy surface of these three-body systems is fairly flat, and that the chemical surrounding of the chalcogen/halogen atoms can play an important role in freezing different structural situations; this is well documented for the I3– anion. The existence of correlations between the two bond distances and more importantly the linearity observed for all these systems, independently on the degree of their asymmetry, support the state of hypervalency of the central atom.
41 citations
TL;DR: In this article, three 1,1-dithiolato organoyltellurium(IV) compounds were synthesized, [1,2-C6H4(CH2)2Te(S2CNC5H10)2] (1), [1 2-C 6H4,CH2,TEI(S 2PEt2) 2] (2), and [ 1 2-c6H 4, CH2, TEI (S2PMe2)] (3), which have been characterized by means of IR
15 citations
TL;DR: A comprehensive review of the structural chemistry of tellurium can be found in this paper, which covers the field through most of the 1990s, through to the early 1990s.
Abstract: Since the author's last surveys of this field in 1983 and 1987,1,2 there has been considerable developments in the structural chemistry of tellurium. A comprehensive review covers the field through most of 1993.3
8 citations
TL;DR: In this paper, two mixed-valent tellurium(II and IV) dithiocarbamate complexes have been prepared and their structures determined by X-ray diffraction studies.
2 citations
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TL;DR: In this paper, relativistic calculations of the photoelectric cross section have been made and the integral for the principal contribution to Δf′ has been evaluated numerically without approximation to the form of the cross section-vs-energy curve, as has been done in previous calculations.
Abstract: Anomalous scattering factors Δf′ and Δf″ have been calculated relativistically for Cr, Fe, Cu, Mo, and Ag Kα radiations for the atoms Li through Cf. An interpolation scheme for other wavelengths is included in a separate report. Relativistic calculations of the photoelectric cross section have been made and the integral for the principal contribution to Δf′ has been evaluated numerically without approximation to the form of the cross section‐vs‐energy curve, as has been done in previous calculations. Many of the results are significantly different from previous calculations. Where experimental values exist, agreement for Δf″ is improved. For the rare gases, except for xenon, agreement between Δf′ and experiment is improved. Because of the more rigorous evaluation of Δf′ from cross‐section information, it is presumed that the present Δf′ values are more accurate than previous calculated values. Calculated mass absorption coefficients for the elements are included as incidental information.
2,698 citations
TL;DR: A computer program, ABSORB, has been written for correcting the observed structure factors using the differences obtained in the last cycle of the isotropic refinement, to model an absorption surface as a Fourier series in the polar angles of incident and diffracted beams.
214 citations
100 citations
TL;DR: The title compound of the title compound is tetragonal, space group P4/mnc, with a = 8.136(5) A, c = 11.810(7) A and Z = 2.947(2)A.
31 citations
19 citations