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Metal complexes of cyanocarbons VIII. Dicyanoacetylene complexes of platinum

1970; Elsevier BV; Volume: 25; Issue: 1 Linguagem: Inglês

10.1016/s0022-328x(00)86229-4

1872-8561

Gregory L. McClure, William H. Baddley,

Synthesis and characterization of novel inorganic/organometallic compounds

Reactions of the cyanocarbon, dicyanoacetylene, with some Pt0 and PtII substrates have been studied under preparative conditions, and several new, very stable complexes have been isolated and characterized. The compound Pt(Ph3P)2(C4N2) is obtained from the reaction of C4N2 with either Pt(Ph3P)4, Pt(Ph3P)2(PhCCH), or PtHCl(Ph3P)2, and the tertiary arsine analog Pt(Ph3As)2(C4N2) is obtained from Pt(Ph3As)4. Reaction of the alkyl phosphie complex PtHCl(Et3P)2 with C4N2 in tetrahydrofuran gives Pt(Et3P)2(C4N2), but when the reaction is carried out in benzene a dicyanovinyl complex, PtCl[C(CN)CHCN](Et3P)2, is obtained. Also described are reactions of Pt(Ph3P)2(C4N2) with several reagents, including Br2 and HX (X = Cl, Br) which give Pt(Ph3P)2(C4N2Br2) and PtX[C(CN)CHCN](Ph3P)2 respectively. Analogous chemical characteristics of Pt(PPh3)2(C4N2) and cyclopropenes are discussed.