Crystal structures of 6-cyclo­propyl-1,3-di­phenylfulvene and 6-(2,3-di­meth­­oxy­naphth­yl)-1,3-di­phenylfulvene

The title compounds, 6-cyclo­propyl-1,3-diphenylfulvene, C21H18, [systematic name: 5-(cyclo­propyl­methyl­idene)-1,3-di­phen­yl­cyclo­penta-1,3-diene], 1, and 6-(2,3-di­meth­oxy­naphth­yl)-1,3-diphenylfulvene, C30H24O2, {systematic name: 5-[(3,4-di­meth­oxy­naphthalen-2-yl)methyl­idene]-1,3-di­phenyl­cyclo­penta-1,3-di­ene}, 2, were prepared from 1,3-di­phenyl­cyclo­penta­diene, pyrrolidine, and the corresponding aldehydes in an ethano­lic solution. Each structure crystallizes with one mol­ecule per asymmetric unit and exhibits the alternating short and long bond lengths typical of fulvenes. A network of C—H⋯C ring inter­actions as well as C—H⋯O inter­actions is observed, resulting in the compact packing found in each structure.