Structures of binary carbonyls and related compounds. Part 1. A new approach to fluxional behaviour
- 1 January 1978
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 11,p. 1554-1568
- https://doi.org/10.1039/dt9780001554
Abstract
The different types of carbonyl scrambling observed in [M4(CO)12](M = Co, Rh, or Ir) compounds and substituted derivatives may be explained in terms of a single type of process. The initial icosahedral arrangement of ligands rearranges along a well defined reaction co-ordinate via a cubo-octahedral transition state; the existence of different patterns of carbonyl scrambling then arises as a consequence of the geometrical disposition of the metal-atom tetrahedron within the ligand polyhedron. Rather than using a different ad hoc mechanism to rationalise each observed fluxional process, this is a single type of carbonyl-scrambling path involving the concerted motion of all the atoms in the molecule in ways that are well defined in terms of molecular geometry.Keywords
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