Porphyrazines with annulated diazepine rings, 1 synthesis and characterization of tetrakis-2,3-(5,7-diphenyl-6H-1,4diazepino)porphyrazine and its Mg-II, Cu-II, and Zn-II complexes - X-ray crystal structure of 2,3-dicyano-5,7-diphenyl-6H-1,4-diazepine

A new class of porphyrazine macrocycles carrying peripheral diazepine rings , i.e. tetrakis-2,3-(5,7-diphenyl-6H-1-4-diazepino)porphyrazine [Ph(2)DzPzH (2)](H2O)(4), and its metal derivatives of formula [Ph(2)DzPzH(2)](H2O)(x=2 -7) [M = Mg-II(H2O), Cu-II, Zn-II] have been prepared and characterized. Si ngle crystal X-ray work on the monomeric precursor 5,7-diphenyl-2,3 -dicyan o-6H-1,4-diazepine, Ph-2(CN)(2)Dz, and NMR spectra (CDCl3, (CD3)(2)SO) and UV/Vis spectra in solution of different media (basic, neutral, acid) of the monomer and its macrocyclic derivatives have provided information on the c onformational flexibility of the diazepine ring as well as on the structura l and electronic features of the entire porphyrazine skeleton.