Summary
The positive ion chemical ionization mass spectra, with ammonia, dimethylamine and methane at 0.5 torr, of RR'C2Co2(CO)6, where alkyne is HC2CH2OH, HC2CMe2OH, HC2CH2NMe2, HC2Ph, PhC2Ph, MeC2Me and MeO2CC2- CO2Me are reported. The nature of the coordinated ligands affects the ion affinity and the addition site for the reagent gas ion. In the complexes with alkynes containing appropriate functional groups, such as hydroxo- and amino-groups, addition of the ionic species occurs on the ligand, whereas it occurs on one of the cobalt atoms when the ligand is phenylacetylene, diphenylacetylene and 2-butyne. Ammonia and dimethylamine also give substitution reactions in which neutral reagent gas molecules replace carbonyl groups of metal containing ions. A comparison between the spectra of the free ligands and those of the corresponding carbonylcobalt complexes is also discussed.
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Cetini, G., Michelin-Lausarot, P., Operti, L. et al. Gas phase ion/molecule reactions of alkynehexacarbonyldicobalt compounds with ammonia, dimethylamine and methane. Transition Met Chem 8, 380–382 (1983). https://doi.org/10.1007/BF00618579
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DOI: https://doi.org/10.1007/BF00618579