Abstract
A structural investigation of compounds of the type MX3L3(M = Rh or Ir; X = Cl, Br, or I; L = dialkyl sulphide) has been carried out. The use of simple sulphides, L = Me2S, Et2S, C4H8S, or C5H10S resulted in the formation of stable, crystalline solids facilitating the assignment of stereochemistry. I.r., u.v., 1H n.m.r., and dipole moment measurements have been used to clearly show that the compounds obtained by the reaction of the appropriate metal halide with the dialkyl sulphide all have a common octahedral meridional configuration.

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