MONONUCLEAR AND DINUCLEAR MO-II PHTHALOCY ANINATES(2-) - SYNTHESES AND PROPERTIES OF BIS(CYANO)PHTHALOCYANINATO(2-)MOLYBDATE(II) AND BIS(PHTHALOCYANINATO(2-)MOLYBDENUM(II))

Blue diamagnetic bis(phthalocyaninato(2-)molybdenum(II)) is synthesize d by reduction of oxophthalocyaninato(2-)molybdenum(IV) with boiling t riphenylphosphine. The Mo-Mo stretching vibration ist observed in the resonance Raman spectrum at 374 cm(-1). It is chemically inert and dis solves in cone. sulfuric acid without decomposition. It reacts with mo lten tetra(n-butyl)ammonium cyanide to yield red-brown paramagnetic bi s[tetra(n-butyl)ammonium] biscyanophthalocyaninato(2-)molybdate(II) (m u(eff) = 3.15 mu(B); S = 1). The complex salt is very instable and dem etallizes in solution. In the extraordinary UV-VIS-NIR spectrum an int ense trip-triplet transition at 7780 cm(-1) together with a very struc tured B region between 14000 and 21000 cm(-1) of comparable absorbance is observed.