Diffusion coefficients of zirconocene–borate ion pairs studied by pulsed field-gradient NMR—evidence for ion quadruples in benzene solutions

Abstract

Diffusion coefficients for ion pairs containing zirconocene cations and fluorinated tetraphenyl- or methyltriphenyl-borate anions in benzene solutions are substantially smaller than those expected for monomeric species and indicate that ion quadruples are present in these solutions.