Abstract
ALTHOUGH the reactions of fluoro-olefines with transition metal complexes have yielded very stable fluoro-olefine and fluorocarbon complexes1–3 analogous reactions with chloro-olefines have hitherto resulted in chlorination to form metal chlorine bonds4–6. We find, however, that on refluxing a benzene solution of Pt(PPh3)4 (ref. 7) with tetrachloroethylene the complex (Ph3P)2PtC2Cl4 is formed in high yield as white air stable crystals with a melting point of 278° C dec. This would seem to be the first example of a perchloro-olefine transition metal complex. The reaction of Pt(PPh3)4 with a number of halogeno-olefines, for example, tetrafluoroethylene, trichloroethy-lene, trans-dichloroethylene, 1,1,1-trifluoro-2,3,3-trichloro-2-propene, appears to be a general reaction for the preparation of complexes of the type (Ph3P)2Pt olefine. The complexes prepared in this work and the recently described tetracyanoethylene8 complex are considerably more stable than the olefine complexes of this type which were originally prepared with trans-stilbene, trans 4,4, dinitrostilbene and acenaphthylene9.
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BLAND, W., KEMMITT, R. Chloro-olefine Complexes of Platinum. Nature 211, 963 (1966). https://doi.org/10.1038/211963b0
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DOI: https://doi.org/10.1038/211963b0
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