Synthesis, spectral and structural characterisation of ditelluroxanes: μ-oxo-bis[nitrato-; 2,4,6-trinitrophenolato-dialkyl tellurium (IV)]
作者:Prakash C. Srivastava、Sangeeta Bajpai、Chhabi Ram、Rajesh Kumar、Ray J. Butcher
DOI:10.1016/j.jorganchem.2007.02.026
日期:2007.5
The synthesis of ditelluroxanes: mu-oxo-bis[nitrato dimethyl tellurium (IV)] [(CH3)(2)TeNO3](2)O (1), mu-oxo-bis[(2,4,6-trinitro)phenolato dimethyl tellurium (IV)] [(CH3)(2)TeOC6H2(NO2)(3)](2)O (2) and mu-oxo-bis[1-(2,4,6-trinitro)phenolato-1,1,2,3,4,5-hexahydrotellurophene] [C4H8TeOC6H2(NO2)(3)](2)O (3) was achieved. 1 was synthesised by the reaction of (CH3)(2)TeI2 with fuming HNO3 while 2 and 3 were synthesised by the reactions of R2Te(OH)(2) [R-2 = (CH3)(2), (C4H8)] (in situ) with 2,4,6-trinitrophenol [2,4,6-(NO2)(3)C6H2OH] (picric acid). 1-3 have been investigated through UV/Vis; FT-IR, (H-1, C-13) NMR spectroscopy and single crystal X-ray diffraction studies. In 1-3 the immediate coordination geometry about the central tellurium atom can be described as pseudo trigonal bipyramidal and the stereochemically active electron lone pair occupying equatorial position. The supramolecular self-organisations of these tetraorgano ditelluroxanes (1-3) are explained through cooperative participation of Te center dot center dot center dot O secondary bonds, C-H center dot center dot center dot O hydrogen bonds and pi-stacking of the organic substituents. (c) 2007 Elsevier B.V. All rights reserved.