Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Bis[4-(diphenylmethyleneamino)phenyl]methanone
oleh: Sylvain Bernès, Guadalupe Hernández, Roberto Portillo, Sandra Cruz, René Gutiérrez
Format: | Article |
---|---|
Diterbitkan: | International Union of Crystallography 2010-06-01 |
Deskripsi
The title molecule, C39H28N2O, is a well known dendron used in the synthesis of phenylazomethine dendrimers. The central benzophenone core is twisted, as expected, due to hindrance between H atoms: the dihedral angle between core benzene rings is 54.49 (5)°, identical to that of the stable polymorph of benzophenone (56°). For the same reason, phenyl groups substituting imine C atoms make a large dihedral angle, although similar for each imine: 71.83 (6) and 67.64 (5)°. The six aromatic rings in the molecule thus seem to be quite randomly oriented, and such an arrangement is not favorable for efficient stacking interactions in the crystal. The same behaviour is observed in the vast majority of diphenylimino-containing organics. The low triclinic crystal symmetry may be a consequence of these features.