13 C n.m.r. studies on the three structurally related carbonyl clusters [Rh6(CO)16], [Rh6(CO)15]2– and [Rh7(CO)16]3– show that [Rh6(CO)16] is not fluxional at +70°, [Rh6(CO)15]2– readily undergoes intra-carbonyl exchange at –70° and [Rh7(CO)16]3– is not fluxional at –70° but undergoes partial intra-exchange at +25°.
B. T. Heaton, A. D. C. Towl, P. Chini, A. Fumagalli, D. J. A. McCaffrey and S. Martinengo, J. Chem. Soc., Chem. Commun., 1975, 523 DOI: 10.1039/C39750000523
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