X-ray structure carbocations

The elusiveness of "free" silyl cations in condensed phases stands in remarkable contrast to the behavior of the isoelectronic carbocations [11] which Olah s school has explored so extensively in super acid media [12]. Laube s splendid recent series of carbocation X-ray structures [13, 14] illustrate what to expect truly "free" cations will be separated from the nearest atoms of the counteranions by 3 A or so. Despite the larger size of silicon, the Si-ligand distances in the Lambert-Reed structures are only modestly longer than typical covalent bonds, and are in the range expected for dative bonds [IS]. 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ , ]

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