89718-05-8Relevant academic research and scientific papers
Cycloaddition Reactions of Azide Ligands in Phosphane Complexes of Palladium(II), Platinum(II), and Iridium(I)
Kreutzer, Peter H.,Weis, Johann Ch.,Bock, Henning,Erbe, Juergen,Beck, Wolfgang
, p. 2691 - 2707 (2007/10/02)
Nitriles are added to the azide ligands of the planar compounds cis-(R3P)2Pt(N3)2 and trans-(Ph3P)2Ir(CO)N3 to give to 5-R-tetrazolato complexes 1 - 3.Kinetic studies show that the rate of the -cycloaddition increases with donor strength of the phosphane ligands and with electron-poor nitriles.The mechanism of the reactions is discussed.Using HCl or acyl chlorides, from 3 and (Ph3P)2Pd(5-R-tetrazolate)2 the free 5-R-tetrazoles or disubstituted tetrazoles are obtained under mild conditions. (Ph3P)2Pd(N3)2 reacts with MeO2CCCCO2Me to give the triazolato complexes 5, 6.Organic isothiocyanates and thiocyanates yield tetrazolinethionato (7) and 5-(methylthio)tetrazolato complexes (8).Using 1H NMR spectroscopy isomeric complexes with these ambidentate heterocyclic ligands can be detected.
