How can the metal affect the proton transfer to the dihydrides [{P(CH2CH2PPh2)3}MH2] (M = Fe, Ru, Os)? A low-temperature electronic spectroscopy study.

Autor: E. I. Gutsul, N. V. Belkova, G. M. Babakhina, L. M. Epstein, E. S. Shubina, C. Bianch
Zdroj: Russian Chemical Bulletin; May2003, Vol. 52 Issue 5, p1204-1206, 3p
Abstrakt: According to low-temperature UV-Vis spectroscopy data, the two-step protonation of iron subgroup metal hydrides [{P(CH2CH2PPh2)3}MH2] (M = Fe, Ru, Os) with p-nitrophenol includes the formation of ion pairs stabilized by a hydrogen bond between the cationic dihydrogen complex and the phenolate anion. The trend of the extent of proton transfer appeared to be aperiodic, FeI ≪ OsI < RuI, in contrast to the previously obtained sequence of the proton-acceptor capacity of the hydride ligand, which increases down the group. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index