Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 7, Issue 5, Pages 1049-1053Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b415078c
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The sequential dissociations of the tetranuclear zinc cluster-ion [(CH3)(3)Zn-4(O-i-C3H7)(4)](+) obtained by dissociative electron ionization of neutral [(CH3) Zn(O-i-C3H7)](4) are investigated by tandem mass spectrometry. After initial loss of a neutral (CH3) Zn(O-i-C3H7) unit to afford [(CH3)(2)Zn-3(O-i-C3H7)(3)](+), hydrogen migration leads to the expulsion of neutral acetone concomitant with [(CH3)(2)Zn-3(O-i-C3H7)(2)(H)](+) as ionic fragment. Unimolecular dissociation of the latter gives rise to [(CH3)(2)Zn-2(O-i-C3H7)](+) and neutral HZn(O-i-C3H7). As demonstrated by collisional ionization of the neutral product, in the fragmentation of the dinuclear cluster [(CH3)(2)Zn-2(O-i-C3H7)](+) neutral CH3ZnH is formed, rather than the more stable fragments Zn + CH4. From the resulting mononuclear species CH3Zn(OC(CH3)(2))(+) acetone is eliminated to afford CH3Zn+ as a quasi-terminal fragment ion.
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