Acta Cryst. (2007). E63, o542-o544  [ doi:10.1107/S1600536807000414 ]

A second polymorph of carvedilol

H. S. Yathirajan, S. Bindya, T. V. Sreevidya, B. Narayana and M. Bolte

Abstract: A second polymorph of the title compound [systematic name: 1-(9H-carbazol-4-yloxy)-3-[2-(2-methoxyphenoxy)ethylamino]propan-2-ol], C₂₄H₂₆N₂O₄, is described. The other polymorph [Chen, Zeng, Yu & Xu (1998). Jiegou Huaxue (Chin. J. Struct. Chem.), 17, 325-328] also crystallizes in the space group P2₁/c, but differs in two torsion angles of the chain connecting the aromatic residues. On the other hand, the hydrogen-bond patterns of the two polymorphs are rather similar.

Online 10 January 2007

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