Metal Tetrahydroborates and Tetrahydroborato Metalates, 15 [1]. An 11B and 113Cd NMR Study of MBH4–CdCl2 Systems in Dimethylformamide and the X-Ray Structure of CdCl2 · 2 DMF

Abstract

CdCl2 dissociates in dimethylformamide into the species Cd(DMF)6 2+, CdCl(DMF)5 + and CdCl3 - as determined by 113Cd NMR spectroscopy. 11B and 113Cd NMR spectra of MBH4/CdCl2 solutions in this solvent show the presence of complexes [CdCl2 -n(BH4)n+1]- with rapid exchange of BH4 - and Cl- at ambient temperature. There is no evidence that Cd(BH4)2 is formed in a metathetical reaction. The crystal structure of CdCl2 · 2 DMF has been determined. It is a coordination polymer containing hexacoordinated Cd atoms with the DMF molecules in cis-position. Coordination of DMF occurs via the carbonyl oxygen atoms.