engleski

Synthesis, NMR and Computational Study of 1, 2-Diethyl-3-(trimethylsilyl)cyclopropenylium Hexachloroantimonate

Preparation and 13C NMR identification of 1, 2-diethyl-3-(trimethylsilyl)cyclopropenylium hexachloroantimonate (4) is described. The assignment of the NMR data was corroborated by calculating 13C NMR chemical shifts of the corresponding model ion 4M. The total stabilisation of the parent cyclopropenylium ion 1 substituted by the silyl and the two methyl groups is found to be only slightly lower than stabilisation of the trimethyl derivative. The computed NICS(1) parameters reveal that all of the examined ions possess substantial aromatic character.

1; 2-diethyl-3-(trimethylsilyl)cyclopropenylium hexachloroantimonate; 13C NMR chemical shifts; electronic structure; stabilisation by alkyl and silyl group; NICS(1)

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