Acta Cryst. (2010). E66, o2090-o2091 [ doi:10.1107/S1600536810028424 ]
Abstract: The title compound, C27H39N2+·C24H20B-·2CH2Cl2, is the first reported imidazolidinium cation with the sterically demanding 2,6-diisopropylphenyl groups in the 1,3-positions. The crystal structure is stabilized by weak intermolecular C-H(arene) interactions. Due to the bulky nature of both the flanking 2,6-diisopropylphenyl substituents and the tetraphenylborate counter-ion, anion interactions with the imidazolidinium H atom in the 2-position are not observed, also a first for this class of ortho-alkyl-substituted Arduengo-type carbene precursors.
Online 24 July 2010
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