摘要:
Base-promoted intramolecular hydroalkylation of the carbon-carbon triple bond in the ruthenium bis(arene) complexes [(p-cymene)Ru(eta(6)-C(6)H(5)CdropCR)]-[OTf](2) (1, R = Et; 2, R = Ph; OTf = O3SCF3) generates the strained [3]ruthenocyclophane complexes 3 and 4, in which a propenyl (-CH2CR=CH-) group bridges the two arene ligands. The presence of the propenyl bridge results in a bent-metallocene structure for the [3]ruthenocyclophane cation in 4, with an angle of 11.8degrees between the arene ligands.