NMR INVESTIGATION OF THE LABILITY AND LEWIS ACIDITY OF SOME ORGANOTELLURIUM(IV) DIHALIDES - CRYSTAL-STRUCTURE OF (1,3-DIHYDRO-2-LAMBDA-4BENZOTELLUROLE-2,2-DIYL) DIFLUORIDE, C8H8TEF2
D DAKTERNIEKS, R DIGIACOMO, RW GABLE, BF HOSKINS
JOURNAL OF ORGANOMETALLIC CHEMISTRY | ELSEVIER SCIENCE SA LAUSANNE | Published : 1988
Tellurium-125 NMR data indicate that organotellurium(IV) dihalides C8H8TeX2 (X = F, Cl, Br, I) do not form adducts with halide ion to any appreciable extent in solution. All the halides are labile in solution and mixed-halide species C8H8TeXX′ have been observed for all halide combinations except X = F, X′ = I. Crystals of C8H8TeF2 are monoclinic, space group P2/n with Z = 4, a 9.3667(12), b 9.3009(9),c 9.5581(13) Å and β 103.422(11)°. Each Te is bonded to the two carbons of the C8H8 group as well as to four fluorine atoms; two of these fluorine atoms bridge asymmetrically between adjacent tellurium atoms to give an overall two dimensional polymer. © 1988.