Synthesis and Characterization of Substituted Derivatives of (Tetraazacycloalkadienato)nickel(II) Complexes with Uninegative Ligands, and Crystal Structure of Parent Complex [Ni(Me2[14]dienatoN4)]Br·H2

Abstract

Abstract The (tetraazacycloalkadienato)nickel(II) complexes [Ni(Me2[Z]dienatoN4)]+ (Z=13, 14), which have an unsaturated chelate ring containing nucleophilic center, react with electrophilic reagents such as benzoyl chloride. p-methylbenzoyl chloride, and p-nitrobenzoyl chloride to give the substituted derivatives [Ni(Me2E[Z]dienatiN4)PF6. These complexes have been characterized by elemental analyses, 1H NMR, infrared, and electronic spectra. One of the parent complexes [Ni(Me2[14]dienatoN4)]Br·H2O has been subjected to the single-crystal X-ray diffraction technique and its structural data indicated that the average Ni–N bond distance is longer than that of the corresponding thirteen membered complex.