K. Laali, C. Wesdemiotis, M. J. Polce
1995
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0
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2
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Journal
Journal of The Chemical Society-perkin Transactions 1
Abstract
We report a mass spectrometric study (FDMS, FABMS) of a series of phosphonium triflate salts derived from 2,4,6,8-tetra-tert-butyl-1,3,5,7-tetraphosphacubane 1 and 1,2,5,6-tetraphosphatricyclo[4.2.0.02,5]octa-3,7-diene 2, namely 3+(OTf)–, 4+(OTf)–, 5+(OTf)–, 62+(OTf·SbCl6)2–, 72+(OTf·SbCl6)2– and 8+(OTf–).Except for the dications, the intact phosphonium ions were observed in all cases. The host–guest (H–G) chemistry of 3+ and some of its fragment ions with dicyclohexano-24-crown-8 have been probed. Low energy collisional decomposition of 3+ gives m/z 115 and 169 as prominent products for which structures 12+ and 11+ have been suggested in analogy with the recently discovered solution chemistries of phosphaalkynes and phosphirenes. The decomposition pathways of the studied phosphonium cations have been compared and discussed.