Platinum complexes with unsaturated amines. Part VIII. The ultraviolet spectra of platinum–olefin complexes of the type [(ol)PtCl3]–(ol = olefin)

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Abstract
The ultraviolet spectra of a number of platinum–olefin complexes [(ol)PtCl3]–(ol = C2H4, C3H5OH, C3H5NH3 +, C4H7NEt3 +, and C3H5PEt3 +) show three main bands in the region 31,000–45,000 cm.–1, which are assigned to metal d to olefin π* transitions. This assignment gives the order of the relative energies of the d orbitals in these complexes as dx2–y2 > dxy > dz2 > dyz > dxz.