The chemistry of niobium and tantalum dithiocarbamato-complexes. Part 2. Trimethylhydrazido(1–)-complexes: the reactivity and X-ray crystal structure of [Ta(NMeNMe2)(S2CNEt2)3]Br·CHCl3

Abstract

The synthesis and characterisation of [TaCl₃(NMeNMe₂)₂], [TaCl₃(NMeNMe₂)(S₂CNEt₂)], and [Ta(NMeNMe₂)(S₂CNEt₂)₃]Br are described. The X-ray crystal structure of [[graphic omitted]-(S₂CNEt₂)₃]Br shows the cation to contain a side-on co-ordinated trimethylhydrazido(1–)-ligand with distances Ta–NMe 1.932, Ta–NMe₂ 2.209 Å, and Ta–S in the range 2.542–2.573 Å. The reactivity of the trimethylhydrazido(1–)-ligand towards protonation and substitution is discussed.