Preparation and characterization of diphenylbis(N,N-dialkyldithiocarbamato)tellurium (IV) and chlorodiphenyl(N,N-dialkyldithiocarbamato)tellurium(IV). Crystal structures of Ph₂Te[S₂CNMe₂]₂, Ph₂TeCl[S₂CNEt₂], and Ph₂TeCl[S₂CN(i-Pr)₂]

Abstract

A number of dithiocarbamate derivatives Ph2Te[S2CNR2I2, where R = Me, Et, and Ph2TeC1[S2CNR2], where R = Me, Et, i-Pr, have been prepared and characterized initially by analysis and vibrational spectroscopy. Three crystal structures have been completed that allow for comparisons of the effect of the change in the nature of R and of the presence of a chlorine atom. The dithiocarbamate groups are monodentate (or anisobidentate) and the geometry about tellurium is consistently that of a distorted sawhorse structure. Examples of both inter-and intra-molecular Te.. . S interactions are observed as well as an intermolecular

Synthesis, characterization and structural studies of dithiocarbamate derivatives of 2,2,6,6-tetramethyl-1-oxa-4,4-diiodo-4-tellura-2,6-disilacyclohexane,O[Si(CH3)2CH2]2TeI(dtc)

“…Tables 2 and 3. The coordination geometry of the tellurium center in the three compounds can be described as the sawhorse structure typical of Te(IV) compounds in which the lone-pair of electrons is apparently stereochemically active and occupies an equatorial position in a distorted trigonal bipyramid [1][2][3][4][5][6][7][8][9][10][11][12] (1) and 2.91(1) Å), with a shortening of the Te-S bond; this behavior has been observed in Me 2 TeI[S 2 -…”

“…The great structural diversity of organotellurium (IV) derivatives with 1,1-dithio ligands [1], such as dithiocarbamates [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], dithiophosphates [4,[14][15][16][17], dithiophosphinates [11,12] and xanthates [13,14,18] are greatly influenced by the nature of the ligands, and little changes in aspects, such as the size of the ligand's bite, the strong tendency to form inter-and intra-molecular interactions, and the presence of the apparently stereochemically active lone pair of electrons could influence the coordination geometry. As an extension, of our previous studies on organotellurium (IV) derivatives of dithiocarbamate ligands, we present herein the results of the preparation and spectroscopic characterization of five new monosubstituted bicyclic complexes O [Si(CH 3 (5), such compounds contain, in addition to a cyclic dithiocarbamate ligand an interesting silicon containing organometallic tellurium sixmembered heterocycle ring.…”

Synthesis, spectroscopic, and structural studies of dimethyltellurium(IV) alkylene and diphenyl dithiophosphates. Crystal structures of and

“…Thus a variety of stable compounds of ~~~~~k i~ compoun~s of tellurium(~~) containing the dithioorganotellurium(1V) with 1,l-dithio ligands such as N,N-dialkyl carbamate entity such as Te(S,CNR,), have been reported in dithiocarbamates (5)(6)(7)(8)(9)(10)(11)(12)(13)(14), 0-alkyl dithiocarbonates (xanthates) the literature ( 1 4 ) , whereas the analogous xanthates and l2 ¶ 15-17) and 0 3 0 -d i a l k~l dithiophosphates (11-14, dithiophosphates are unknown. hi^ presumably reflects a 17-22) have been described in the literature.…”

Synthesis, spectroscopic and structural studies of O-methyl and O-isopropyl monothiocarbonate (monoxanthate) derivatives of dimethyl-and diphenyltellurium(IV). Crystal structures of Me2Te[SCO2(i-Pr)]2, Ph2Te[SCO2(i-Pr)]2, Me2TeCl[SCO2Me], and Me2TeBr[SCO2(i-Pr)]

“…As was to be expected from the vibrational spectra of the related dithiocarbonate (I), dithiocarbamate (7,8,12), and monothiocarbamate derivatives (26), three peaks arising primarily from the stretching vibrations of the monothiocarbonate core dominate the infrared spectra of compounds 1-11 in the 1700-1000 cm-' region. These are similar, though not Can.…”

“…There have been a number of reports on the reactions of organotellurium(1V) compounds with a variety of 1,l -dithio ligands, such as O-alkyl dithiocarbonates (1)(2)(3)(4)(5)(6), N,N-dialkyl dithiocarbamates (5)(6)(7)(8)(9)(10)(11)(12)(13)(14), and 0,O-dialkyl(alky1ene) dithiophosphates (4-6, [14][15][16][17][18][19][20][21], as well as a recent extensive review of supramolecular associations in tellurium complexes with sulfur ligands (22). In general, the chemistry of monothio ligands has received much less attention but a few reports have appeared relating to main group element derivatives including those on monothiocarbamate compounds of thallium (23), tin (24,25), and, most recently, tellurium (26) as well as on monothiophosphate compounds of tin (27,28).…”