31P nuclear magnetic resonance spectra of some complexes of the type mer-[MX3L3](M = Rh or Ir; X = halogen; L = tertiary phosphine)
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 6,p. 704-708
- https://doi.org/10.1039/dt9720000704
Abstract
31 P N.m.r. data for complexes of the types mer-[RhCl3L3], mer-[IrX3L3], and [IrCl2XL3](L = tertiary phosphine; X = Cl, Br, or I), are reported. For the complexes mer-[MCl3L3](M = Rh or Ir), there is a linear correlation between the 31P chemical shifts of the free tertiary phosphine and the change in chemical shift on co-ordination. The effects of changing the halogen, X, on the 31P chemical shifts are discussed. 2J(P–P)(cis) Values are all small (ca. 20 Hz) but for the complex [IrCl3(PMe2Ph)2(PEt3)]2J(P–P)(trans) is 427 Hz. Some 31P n.m.r. spectral interpretations in the literature are corrected.Keywords
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