Preparation, characterization and X-ray crystal structure of Ru2H6N2(PPH3)4, a compound containing four bridging hydrides and a ruthenium–ruthenium double bond
Abstract
The compound obtained by recrystallisation under N2 of the hydrogenation product of Ru(styrene)2(PPh3)2 has been shown to be Ru2H6N2(PPh3)4, a compound containing four bridging hydrides and a short Ru–Ru distance which is consistent with a metal–metal doubel bond; 1H and 31P n.m.r. spectra have allowed us to propose that the crude hydrogenation product is a mixture of RuH6(PPh3)2 and Ru2H8(PPh3)4.