Crystal structures of (E)-1-{3-[(5-fluoro-2-hy-droxy-benzyl-idene)amino]-phen-yl}ethanone and of a fourth polymorph of (E)-1-{3-[(2-hy-droxy-3-meth-oxy-benzyl-idene)amino]-phen-yl}ethanone.

ABSTRACT: In the mol-ecules of both (E)-1-{3-[(5-fluoro-2-hy-droxy-benzyl-idene)amino]-phen-yl}ethanone, C₁₅H₁₂FNO₂, (I), and (E)-1-{3-[(2-hy-droxy-3-meth-oxy-benzyl-idene)amino]-phen-yl}ethanone, C₁₆H₁₅NO₃, (II), which crystallizes with Z' = 2 in space group Pca2₁, there are intra-molecular O-H?N hydrogen bonds, and the non-H atoms in each mol-ecule are essentially coplanar. In the crystal of (I), mol-ecules are linked by a single C-H?O hydrogen bond to form a C(8) chain, whereas in the crystal of (II), mol-ecules are linked by three C-H?O hydrogen bonds to form sheets within which orthogonal C₂²(16) and C₂²(17) chains can be identified. Comparisons are made with some related structures.

SUBMITTER: Girisha M 

PROVIDER: S-EPMC5730235 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature