Synthesis, Spectroscopy and Electrochemistry of nitroso terpyridine-{1-(alkyl)-2-(arylazo) imidazole}ruthenium(II) Complexes

Prithwiraj Byabartta

Abstract


Silver assisted aquation of blue [RuCl(tpy)(RaaiR´)](ClO4) (1a-1i) leads to the synthesis of solvento species, blue-violet  [Ru(OH2)(tpy)(RaaiR´)](ClO4)(2a-2i), [RaaiR´ =p-R-C6H5-N=N-C3H2-NN, abbreviated as N,N/-chelator, R = Me, Et, Bz, p-R=H Me, Cl] that have been reacted with NaNO2in warm EtOH resulting in violet nitro complexes of the type, [Ru(NO2)(tpy)(RaaiR)](ClO4)(3a-3i). The nitrite complexes are useful synthons of electrophilic nitrosyls, and on triturating the nitro compounds with conc. HClO4 nitrosyl derivatives, [Ru(NO)(tpy)(RaaiR)](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.


Keywords


1-(alkyl)-2-(arylazo)imidazole; nitro; nitroso, ruthenium; amines; MLCT; NMR; CV; IR; reactivity

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