Transition-metal nitrosyl compounds. Part IX. The preparation and study of the osmium cation [OsH2(CO)(NO)L2]+(L = triphenyl- or tricyclohexyl-phosphine
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 981-984
- https://doi.org/10.1039/dt9740000981
Abstract
The dihydrides [OsH2(CO)(NO) L2] PF6[L = PPh3(1) or P(C6H11)3(2)] have been prepared from the reaction of Os(CO)(NO)L2Cl and AgPF6 in the presence of H2. 1H N.m.r. data indicate that these compounds are stereo-chemically non-rigid and ΔG‡ Tc values of 48·5 ± 0·8 kJ mol–1 and 53·1 ± 0·8 kJ mol–1 have been determined for (1) and (2) respectively. On reaction with CO the dihydrides readily undergo H2 displacement to give the salts [Os(CO)2(NO) L2] PF6. Complex (1) reacts similarly with PPh3 to give [Os(CO)(NO)(PPh3)3]PF6 but complex (2) reacts with P(C6H11)3 to form the neutral complex OsH(CO)(NO){P(C6H11)3}2 by H+ abstraction.Keywords
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