Studies on Mixed Valence Complexes of Platinum and Palladium. I. Preparation and Characterization of Pt(II)–Pt(IV), Pd(II)–Pt(IV), and Pd(II)–Pd(IV) Complexes of the General Formula, [M(AA)2][M′X2(AA)2]Y4
Authors:
- 1 August 1978
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 51 (8) , 2334-2337
Abstract
A series of deeply colored mixed valence complexes of the general formula [M(AA)2][M′X2(AA)2]Y4 were prepared and characterized, where M–M′=Pt(II)–Pt(IV), Pd(II)–Pt(IV), and Pd(II)–Pd(IV); (AA)=ethylenediamine, propylenediamine, and trimethylenediamine; X=Cl, Br, and I; Y=ClO4, BF4. The relationships between the reflection spectra and the nature of the constituents (X, (AA), Y and M–M′) of the compounds were studied. The value of \barνmax of the main absorption band in the visible region decreases in the order: Cl→Br→I, pn→tn→en, ClO4→BF4, Pd(II)–Pt(IV)→Pt(II)–Pt(IV)→Pd(II)–Pd(IV). On the basis of dichroism of the crystals, it can be predicted that the X–M′(IV)–X…M(II) atoms in these complexes are arrayed in a straight line parallel to the crystal needle.Keywords
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