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|Title:||Synthesis and characterization of tetrachloroniobium(V)aryloxides and their lewis base adducts|
Bhatt, S S
Chaudhry, S C
|Abstract:||Tetrachloroniobium (V) aryloxides of composition[NbCl4(Oar1,2)]2 (Oar1 = OC6H4But-4 and OAr2= OC6H4OMe-4) have been synthesized by the reaction of NbCl5 with 4-t-butyl and 4-methoxyphenols in CCl4. The characterization of the complexes has been accomplished by elemental analyses, conductivity measurements, molecular weight determinations, IR, 1H NMR, UV -VIS and MS techniques. Thermal behaviour of the complexes has also been studied by TOA-DTA techniques. From non-isothermal to data, the kinetic and thermodynamic parameters have been calculated using Coats-Redfern equation and the most probable mechanism for thermal decomposition of these complexes is ascertained. The reactions of complexes with a variety of nitrogenous and oxygenous bases have yielded 1:1 adducts authenticated by usual physicochemical and IR spectral studies.|
|Appears in Collections:||IJC-A Vol.42A(03) [March 2003]|
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