Synthesis, Spectral Study, Electrochemistry And Reactivity Of Ruthenium(II)-B-Naphthyl-Azo-Imidazole (B-Nair)-Nitro-Nitroso-Terpyridine (TPY)-Complexes.

Abstract

Silver assisted aquation of blue [RuCl(tpy)(b-NaiR^´)](ClO₄) (1a) leads to the synthesis of solvento species, blue-violet  [Ru(OH₂)(tpy)( b-NaiR)](ClO₄)₂ (2a), [b-NaiR = b-NaphthylazoImidazole = C₆H₅-N=N-C₄H₃-NN, abbreviated as N,N´-chelator] that have been reacted with NaNO₂ in warm EtOH resulting in violet nitro complexes of the type, [Ru(NO₂)(tpy)( b-NaiR)](ClO₄) (3a). The nitrite complexes are useful synthons of electrophilic nitrosyls, and on triturating the nitro compounds with conc. HClO₄ nitrosyl derivatives, [Ru(NO)(tpy)( b-NaiR)](ClO₄)₃ are isolated. The diazotization of the primary aromatic amines with a strongly electrophilic mononitrosyl complex in acetonotrile and dichloromethane solution was thoroughly studied.