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The report discusses: Preparation of dicyanomethylenecarbene and/or metal complexes thereof; Preparation of tetracyanoallene; Reactions of hexacyanobutadiene and related compounds. Of particular interest was the isolation and characterization of the complex (C5H5)2Fe2(CO)3(C=C(CN)2), the first known derivative of dicyanomethylenecarbene. In addition, most reactions of the metal carbonyl anions NaM(CO)3C5H5(M=Mo and W), NaMn(CO)5, and NaFe(CO)2C5H5 with the polycyanovinyl chlorides (NC)2C=CHCl, (NC)2C=C(CN)Cl, and (NC)2C=CCl2 were found to give fair to good yields of the corresponding polycyanovinyl transition metal derivatives. (Author)

Numerous new metal halide, carbonyl, and cyclopentadienyl complexes of the chelating tritertiary phosphine bis(2-diphenylphosphinoethyl) phenylphosphine and the chelating tetratertiary phosphines 1,1,4,7,10, 10-hexaphenyl-1,4,7,10-tetraphosphadecane and tris(2-diphenylphosphinoethyl) phosphine are described. Some preliminary studies of reactions of metal carbonyl derivatives with diphenylvinylphosphine are discussed. Metal complexes of the acetylenic tertiary phosphines (C6H5)2PCH2CCCH2P(C6H5)2 and (C6H5)2PCCC6H5 are described. A few reactions of tris(dimethylamino)arsine with various metal carbonyls are summarized; these resulted in the preparation of the first derivative with two tris(dimethylamino)arsine ligands attached to a single metal atom. The mixed phosphine-isonitrile and arsine-isontrile ligands (C6H5)2ECH2CH2NC(E = P or As) have been prepared by the base-catalyzed addition of (C6H5)2EH(E = P or As) to vinyl isocyanide; these are the first known compounds containing both tertiary phosphine (or arsine) and isonitrile groups. Some new compounds have been obtained from pentacarbonyliron and the diacetylenes 1,7-cyclotridecadiyne, 1,8-cyclotetradecadiyne, and 2,4-hexadiyne. Possible aerospace applications of this research are discussed. (Author)