135757-36-7Relevant academic research and scientific papers
Reactions of μ-Ethynediyl Complexes of Transition Metals: Selective Double Insertion of Isocyanides and Molecular Structure of CC(=NPh)C(=NPh)Pd(PEt3)2Cl>
Onitsuka, Kiyotaka,Ogawa, Hiroo,Joh, Takashi,Takahashi, Shigetoshi,Yamamoto, Yasuhiro,Yamazaki, Hiroshi
, p. 1531 - 1536 (1991)
The μ-ethynediyl-dipalladium complexes CPd(PR3)2X> 1 (X=Cl or I, R=Et or Bu) react with aryl isocyanides R'NC (R'=Ph, 4-NO2C6H4, or 2,6-Me2C6H3) to give double-insertion products C(=NR')C(=NR')Pd(PR3)2X> 2, selectively.Complexes 2 have been characterized by IR, mass, 1H, 13C-, and 31P- NMR spectra.Selective double insertion is peculiar to the μ-ethynediyl dinuclear complexes, and other dipalladium complexes CYCPd(PR3)2Cl> (Y= bond or C6H4) and mononuclear acetylide complexes CR)> (R=Ph or 4-MeOC6H4) give normal single-insertion products, respectively.The dicationic complex CPd(PEt3)2(CNPh)>2 has been isolated as an intermediate, which reacts with NR4X (R=Et or C5H11; X=Cl, Br or I) to give double-insertion products 2.The structure of C(=NPh)C(=NPh)Pd(PEt3)2Cl> has been determined by X-ray analysis: space group P21/c, a=11.488(3), b=24.997(5), c=18.659(4) Angstroem, β=112.91(2) deg, and Z=4.
