Tantalum Dimethyldithiocarbamate Complexes

Resumo

The reaction of Ta(NMe₂)₅ with CS₂ gave the tantalum(V) dimethyldithiocarbamate complex [Ta(^MeDtc)₄](^MeDtc) (I). An ionic structure of the complex with a dodecahedral coordination of the tantalum atom was determined for toluene (I · Tol) and THF (I · THF) solvates by X-ray diffraction (CCDC no. 1544283 and no. 1544284, respectively). The reaction of I with CH₂Cl₂ leads to exchange of the outersphere anion to give the known complex [Ta(^MeDtc)₄]Cl (II). The cyclic voltammogram of II in CH₃CN exhibits a quasi-reversible transition at E_1/2 =–0.735 V corresponding to the Ta^V/Ta^IV pair.