Bis(bicyclo[2.2.1]hepta-2,5-diene)rhodium Perchlorate is a precursor for various cationic rhodium complexes, which are used as catalysts for hydrogenation, allylic
hydrogen migration, hydrosilation, and hydroacylation.
Preparative Methods of Bis(bicyclo[2.2.1]hepta-2,5-diene)rhodium Perchlorate: to a mixture of bicyclo[2.2.1]hepta-2,5-diene (nbd, 0.14 g, 1.5 mmol) and
Bis(bicyclo[2.2.1]hepta-2,5-diene)dichlorodirhodium (0.35 g, 0.75 mmol) in CH2Cl2 (15 mL) at room
temperature is added Silver(I) Perchlorate (0.315 g, 1.5 mmol) under nitrogen. After stirring for 1 h,
precipitated AgCl is filtered off to give a CH2Cl2 solution of [Rh(nbd)2]ClO4. This solution can be directly
used for the next reaction[1], or diluted by THF (15 mL) followed by evaporation of CH2Cl2 under vacuum to
separate orange needles of [Rh(nbd)2]ClO4, which are collected and washed with cold THF and then dried in
vacuo to afford rust-brown crystals (0.5 g)[2].
Bis(bicyclo[2.2.1]hepta-2,5-diene)rhodium Perchlorate can explode when heated.
1. Usón, R.; Oro, L. A.; Cuchi, J. A.; Garralda, M. A. JOM 1976, 116, C35.
2. Fryzuk, M. D.; Bosnich, B. JACS 1977, 99, 6262.
