ISSN:
1042-7163
Keywords:
Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Reaction of K[(SePPh2)2N] with [Te(tu)4]Cl2 (tu = thiourea) in methanol gave [Te{(SePPh2)2N}2], (1), while reaction of K[(SPPh2)2N] with 4-MeOPhTeCl3 in methanol gave [4-MeOPhTe-{(SPPh2)2N}]2, (2). The crystals of 1 are triclinic and contain centrosymmetric molecules. The ligands are bidentate and form a true square planar Te(II) complex with TeSe4 coordination. For 2, the crystals are also triclinic, and the dimeric molecules are centrosymmetric. Each dithiolate ligand bridges the two Te(II) atoms; the result is a T-shaped coordination around each tellurium atom. A tendency to weak Te—Te bonding across the ring-formed dimer roughly in the direction of the missing fourth ligand in a potential square planar tellurium coordination sphere is also found [Te—Te = 3.761 (1) Å]. In 1, the Te-Se bonds have an average length of 2.797 Å. The Te-S bonds in 2 are quite asymmetric with Te(1)-S(1) = 2.551 (3) Å and Te(1)-S(2a) = 2.873 (3) Å, while Te(1)-C(1) = 2.10 (1) Å. © 1998 John Wiley & Sons, Inc. Heteroatom Chem 9: 615-621, 1998
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
