Trevor W. Matheson

Carbon-13 nuclear magnetic resonance spectra of polynuclear carbonyls of cobalt and rhodium

A variable-temperature 13C n.m.r. spectroscopic study of the polynuclear carbonyls [Rh2(η-C5H5)2(CO)3], [Rh2(η-C5H5)2(CO)2(PR3)], [Co2(CO)8], [Rh4(CO)12], [Rh4(CO)11(PPh2R)](R = Ph or Me), [Co4(CO)12], [Co4(C6H5Me)(CO)9], [Co4(RC2R)(CO)10], and [Rh6(CO)151]– has been carried out. Apart from [Co2(CO)8], [CO4(RC2R)(CO)10], and [Co4(CO)12], solution geometries have been established. A variety of CO-fluxional mechanisms have been observed and are discussed.

Triruthenium and triosmium carbonium derivatives

The preparation and protonation of H2Os3-(CO)9CCH2 and other related complexes are reported.

Cyclohepta-1,4-diene(cyclohexa-1,3-diene)(carbonyl) iron

Borohydride reduction of the complex cation [(C7H9)Fe(CO)(C6H8)]+ affords 1,4-C7H10Fe(CO)(C6H8) which thermally isomerises into 1,3-C7H10Fe(CO)(C6H8) and h4-1,3,4,5-C7H9Fe(CO)(C6H8).

13 C nuclear magnetic resonance study of the trinuclear metal carbonyls M3(CO)12(M = Fe, Ru and Os) and some related compounds

Variable temperature 13C n.m.r. spectra of the carbonyls M3(CO)12(M = Fe, Ru, and Os) and other related compounds have been recorded; at least three CO scrambling processes have been shown to operate in these systems.

Carbonyl site exchange in the mixed metal carbonyl RhCo3(CO)12

13 n C N.m.r. studies confirm the structure of RhCo3(CO)12 and indicate that two types of carbonyl site exchange occur via a concerted carbonyl-terminal exchange process.