AU-BPY-RAAIR: Gold(III)-2,2´-Bipyrimidine-ArylAzoImidazole Complexes: Synthesis and Spectral Cherecterisation

Reaction of [Au(bpy)Cl 2 ]PF 6 with AgOTf followed by ligand addition leads to [Au(bpy)(RaaiR / )] in low yield whereas direct substitution gives high yield. [RaaiR /  =  p- R-C 6 H 4 N = N C 3 H 2 NN-1-R /, ( 1–3 ), abbreviated as N,N / -chelator, where N(imidazole) and N(azo) represent N and N /, respectively; R =H ( a ), Me ( b ), Cl ( c ) and R /  = Me ( 1 ), CH 2 CH 3 ( 2 ), CH 2 Ph ( 3 ), OSO 2 CF 3 is the triflate anion, bpy is 2,2´-bipyridine]. The 1 H NMR spectral measurements suggest methylene, –CH 2 –, in RaaiEt gives a complex AB type multiplet while in RaaiCH 2 Ph it shows AB type quartets. 13 C NMR spectrum reflect molecular skeleton. In the 1 H– 1 H COZY spectrum of the present complexesand contour peaks in the 1 H– 13 C HMQC spectrum in the present complexes, assign the solution structure.