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The title compounds, 2-(4-hexyl-oxyphen-yl)-1 H -benzimidazole (C 19 H 22 N 2 O; 1 ), 2-(4-hexyl-oxyphen-yl)-1-phenyl-1 H -benzimidazole (C 25 H 26 N 2 O; 2 ) and 1-benzyl-2-(4-hexyl-oxyphen-yl)-1 H -benzimidazole (C 26 H 28 N 2 O; 3 ) were synthesized and their structures were determined by single-crystal X-ray analysis. The N-substituent at the imidazole moiety slightly affects the inter-planar angle between the 4-hexyl-oxyphenyl ring and the benzimidazole system. The unsubstituted benzimidazole ( 1 ) forms inter-molecular N-H⋯N bonds while in the crystal structures of 2 and 3 , the mol-ecules are assembled only through π-π and C-H⋯π inter-actions.

Synthesis and crystal structures of N-H, N-phenyl and N-benzyl-2-(4-hexyloxyphenyl)benzimidazoles