Acta Cryst. (2013). C69, 770-773 [ doi:10.1107/S0108270113014777 ]
Abstract: The molecules of 3-amino-4-anilino-1H-isochromen-1-one, C15H12N2O2, (I), and 3-amino-4-[methyl(phenyl)amino]-1H-isochromen-1-one, C16H14N2O2, (II), adopt very similar conformations, with the substituted amino group PhNR, where R = H in (I) and R = Me in (II), almost orthogonal to the adjacent heterocyclic ring. The molecules of (I) are linked into cyclic centrosymmetric dimers by pairs of N-HO hydrogen bonds, while those of (II) are linked into complex sheets by a combination of one three-centre N-H(O)2 hydrogen bond, one two-centre C-HO hydrogen bond and two C-H(arene) hydrogen bonds.
Formula: C15H12N2O2 and C16H14N2O2
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