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Mass spectra of organometallic compounds—XIII: Metal carbonyl complexes of tris(dimethylamino)arsine |
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| Authors: | R B King T F Korenowski |
| Institution: | 1. Department of Chemistry, University of Georgia, Athens, Georgia, 30601, USA
Fellow of the Alfred P. Sloan Foundation, 1967 to 1969.;2. Department of Chemistry, University of Georgia, Athens, Georgia, 30601, USA NDEA Predoctoral Fellow, 1966 to 1969. |
| Abstract: | The mass spectra of the tris(dimethylamino)arsine metal carbonyl complexes (CH3)2N]3-AsM(CO)5 (M = Cr, Mo and W), trans-(CH3)2N]3AsCr(CO)4AsN(CH3)2]3 and (CH3)2N]3-AsFe(CO)4 were examined and compared with those of the corresponding tris(dimethylamino)-phosphine complexes. The molecular ions in the mass spectra of the tris(dimethylamino)arsine complexes have a greater tendency to eliminate a (CH3)2N fragment than the molecular ions in the mass spectra of the corresponding tris(dimethylamino)phosphine complexes. The mass spectrum of the tungsten derivative (CH3)2N]3AsW(CO)5 exhibits not only the usual series of ions (CH3)2N]3-AsW(CO)n+ and (CH3)2N]2AsW(CO)n+ but also the series of ions (CH3)2NAsW(CO)n]+ (n = 5, 4, 3, 2, 1 and 0) and even the nitrogen-free ions AsW(CO)n]+ (n = 2, 1 and 0). Metastable ion evidence was obtained for arsine (AsH3) elimination from the (CH3)2N]2AsFeH+ ion in the mass spectrum of (CH3)2N]3AsFe(CO)4. |
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