Synthesis of p-Cyano(2,3-naphthalocyaninato)iron(III) and comparison to u-Cyano(phthalocyaninato)iron(III)
FacultiesFakultät für Naturwissenschaften
LicenseStandard (Fassung vom 03.05.2003)
Potassium dicyano(2,3-naphthalocyaninato)ferrate(III), K[2,3-NcFe(CN)(2)], reacts in water with elimination of KCN to form p-cyano(2,3-naphthalocyaninato)iron(III)[,2 ,3-NcFe(CN)In (4a). D ichloro(2,3-naphthalocyaninato)iron(III),2 ,3-NcFeClZ( 3) reacts with KCN to yield also [2,3-NcFe(CN)In (4b). Both compounds 4a and 4b show similar IR spectra with a typical blueshifted CN valence frequency caused by a bridging function of CN-. Compounds 4a and 4b also show almost identical 57Fe-Mossbauer spectra which, however, might be interpreted with a Fe( + 11) oxidation state of the iron. The measured magnetic moment of 4 however clearly proves the expected oxidation state +I11 of the iron in (2,3-NcFe(CN)], (4). Compounds 4a and 4b both exhibit good semiconducting properties (oRTx S/cm) without additional external oxidative doping. The property is quite similar to that of the known pcyano(phtha1ocyaninato) iron [PcFe(CN)], (oRYx lo-" S/cm).
Original publicationChemische Berichte 126 (1993), S. 2559 - 2563