Acetylacetonato bis(Indenyl)zirconium(IV) Dithiocarbamates

Abstract

A series of [(C₉H₇)₂ZrL]⁺[RR′NCS₂]⁻ complexes (where L is the conjugate base of acetylacetone and R = R′ = C₂H₅ or i-C₃H₇; R = CH₃, R′ = C₆H₅CH₂; R = C₂H₅, R′ = C₆H₄.CH₃; R = C₂H₅, R′ = C₆H₁₁; RR′ = C₆H₁₂) have been synthesised in aqueous solution by the reaction of [(C₉H₇)₂ZrL]⁺Cl⁻ with RR′NCS₂ ⁻Na⁺. Conductivity measurements indicate that these complexes are 1:1 electrolytes in nitrobenzene. IR and ¹H NMR spectral studies demonstrate that the acetylacetone ligand is chelating in all these complexes. Consequently, tetrahedral coordination about the zirconium atom is proposed.