Darstellung und spektroskopische Charakterisierung von Nitridophthalocyaninatomangan(V) / Preparation and Spectroscopical Characterization of Nitridophthalocyaninatomanganese(V)

Abstract

Nitridophthalocyaninatomanganese(V), MnNPc(2–), has been prepared by oxidation of [Mn(OH)2,Pc(2–)]- with chlorine in the presence of excess ammonia in dichloromethane as a chemically very stable, diamagnetic microcrystalline blue powder. The band at 1053 cm-1 in the infrared and resonance Raman spectra is assigned to v(Mn=N). The strong resonance enhancement of v(Mn=N) coincides with an electronic transition at 461 nm assigned to (N → Mn) electron transfer. The UV-VIS spectrum in 1-chloronaphthalene is compared with that of the MnNPc(2–)–H2SO4 adduct and the phthalocyanine-π-cation radical [MnNPc(1–)]+.