名称:
Insertion reaction of isocyanide into the PtC bonds of 2,5-thienylene-bridged diplatinum complexes and 2-thienyl platinum complexes: molecular structure of Cl(Et3P)2PtC(NC6H4OMe-p)C4H2SC (NC6H4OMe-p)Pt(PEt3)2Cl·CH2Cl2
摘要:
Treatments of 2,5-thienylene-bridged diplatinum complexes Cl(R(3)P)(2)PtC4H2SPt(PR(3))(2)Cl (1) with two equivalents of isocyanide cause the insertion of isocyanide into each of the two Pt-C bonds to produce Cl(R(3)P)(2)PtC(=NAr)C4H2SC(=NAr)-Pt(PR(3))(2)Cl (2). 2-Thienyl platinum complexes C4H3SPt(PR(3))(2)Cl (4) also react with isocyanide to give iminoacyl complexes C4H3SC(=NAr)Pt(PR(3))(2)Cl (5). Further insertion of isocyanide into Pt-C bonds of 2 and 5 was not observed even in the reaction with excess isocyanide. When 1a was treated with an equimolar amount of p-tolyl isocyanide, a single-insertion product Cl(Et(3)P)(2)PtC(=NC(6)H(4)Me-p)C4H2SPt(PEt(3))(2)Cl (3b) was obtained altogether with the mixture of 1a and 2a. The molecular structure of Cl(Et(3)P)(2)PtC(=NC(6)H(4)OMe-p)C4H2SC(=NC(6)H(4)OMe-p)Pt(PEt(3))(2)Cl . CH2Cl2 (2b) was determined by an X-ray crystallographic analysis and the crystallographic data are as follows: space group, P2(1)/n; a = 11.044(2), b = 28.086(3) and c = 18.396(3) Angstrom; beta = 93.96 degrees; V = 5692(2) Angstrom(3); Z = 4.