Molecular and supramolecular structures of diethyltellurium diiodide and diethyltellurium bis(carboxylates)

作者：Srivastava Prakash C^*; Singh Vikas; Dwivedi Shrinkhala; Butcher Ray J

来源：Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry , 2010, 49(9): 1197-1205.

• Coordination chemistry
• Tellurium
• Carboxylates
• C-HO hydrogen bonds
• Supramolecular associations

Diethyl tellurium bis(carboxylates) (C(2)H(5))(2)TeR(2)' (R' = C(6)H(5)OCO, 4-NO(2)C(6)H(4)OCO, 3,5-(NO(2))(2)C(6)H(3)OCO, C(6)H(5)CH=CHOCO, 4-OCH(3)C(6)H(4)OCO) have been synthesised from the metathetical reactions of diethyl tellurium diiodide (C(2)H(5))(2)TeI(2) and corresponding silver salts and characterized by (1)H, (13)C and (125)Te NMR spectroscopy. The structures of (C(2)H(5))(2)TeI(2), (C(2)H(5))(2)Te(C(6)H(5)OCO)(2) (C(2)H(5))(2)Te(4-NO(2)C(6)H(4)OCO)(2), (C(2)H(5))(2)Te{3,5-(NO(2))(2)C(6)H(3)OCO}(2), (C(2)H(5))(2)Te(C(6)H(5)CH=CHOCO)(2) and (C(2)H(5))(2)Te(4-OCH(3)C(6)H(4)OCO)(2) have been established by single crystal X-ray diffraction studies. The structures of these complexes (the immediate environment about tellurium is that of distorted trigonal bipyramidal geometry with a stereochemically active electron lone pair) are described in the context of their ability to generate intermolecular TeI and TeO secondary bonds and C(sp(2))-HO and C(sp(3))-HO hydrogen bonds leading to the formation of zig-zag ribbons, stairs, dimeric, trimeric, tetrameric and extended supramolecular assemblies. The modification of supramolecular assembly present in the precursor (C(2)H(5))(2)TeI(2) by replacing the iodines with carboxylate groups is demonstrated and the cooperative participation of intermolecular C(sp(2))-HO and C(sp(3))-HO hydrogen bonds in strengthening the supramolecular assemblies is discussed.

• 出版日期2010-9