Reactions between CO and small molybdenum suboxide cluster anions.

Reaction products resulting from small molybdenum suboxide cluster anions and carbon monoxide were studied with both mass spectrometry and anion photoelectron (PE) spectroscopy. In addition to the C6O6- product proposed previously, a number of unsaturated carbonyls were identified as terminal products in these reactions. A new PE spectrum of what may be C6O6-, in which the contribution from the Fe(CO)4- contaminant is subtracted, is reported. Additionally, the PE spectra of Mo(CO)5-, MoO(CO)3-, and MoO2(CO)n- (n=1 and 2) are presented, along with a new PE spectrum of an additional contaminant, Ni(CO)3-. Evidence of photodissociation of MoO(CO)3- to MoO-+3 CO is observed in the PE spectrum of MoO(CO)3-.