The bis[(3,5-dimethyl-1-pyrazolyl)methyl]ethylamine ligand (1) reacts with [Rh(COD)(THF)2][BF4] leading to [Rh(COD)(1)][BF4] ([BF4]) in which 1 is κ3 bonded in the solid state. Because of the steric bulk of 1,5-cyclooctadiene, it prefers the κ2 mode of bonding in solution. Substitution of 1,5-cyclooctadiene by carbon monoxide generates [BF4] in which 1 is κ3 bonded in solution and solid state. Variable temperature NMR spectroscopic studies give evidence of a κ3 ⇄ κ2 equilibrium in solution. [BF4] is easily decarbonylated to [Rh(CO)(1)][BF4] [BF4] in which 1 is κ3 bonded; however on bubbling carbon monoxide through, [BF4] is regenerated. The single-crystal X-ray structures of [BF4], [BPh4], and [BPh4] are reported.
|Journal||European Journal of Inorganic Chemistry|
|Publication status||Published - 17 Oct 2001|
- Cationic complexes
- Hemilabile ligands