Crystal structures of a series of 6-aryl-1,3-diphenyl-fulvenes

Abstract

The synthesis and crystal structures of a series of 6-aryl-fuvlenes (fulvene is 5-methyl-idene-cyclo-penta-1,3-diene) with varying methyl-ation patterns on the 6-phenyl substituent are reported, namely 6-(3-methyl-phen-yl)-1,3-di-phenyl-fulvene (C₂₅H₂₀), 6-(4-methyl-phen-yl)-1,3-di-phenyl-fulvene (C₂₅H₂₀), 6-mesityl-3-di-phenyl-fulvene (C₂₇H₂₄) and 6-(2,3,4,5,6-penta-methyl-phen-yl)-1,3-di-phenyl-fulvene (C₂₉H₂₈). The bond lengths are typical of those observed in related fulvenes. A network of C-H⋯π ring inter-actions consolidates the packing in each structure.

Keywords: C—H⋯π ring inter­actions; crystal structure; fulvene; methyl­ation patterns.