Crystal structures of (E)-1-{3-[(5-fluoro-2-hy­droxy­benzyl­idene)amino]­phen­yl}ethanone and of a fourth polymorph of (E)-1-{3-[(2-hy­droxy-3-meth­oxy­benzyl­idene)amino]­phen­yl}ethanone

Acta Crystallographica Section E: Crystallographic Communications

Rathore, R.S.¹  Girisha, M.²  Yathirajan, H.S.²  Glidewell, C.³ 

[1] Centre for Biological Sciences (Bioinformatics), School of Earth, Biological and Environmental Sciences, Central University of South Bihar, Patna 800 014, India;Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru 570 006, India;School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, UK

关键词: CRYSTAL STRUCTURE;    MOLECULAR CONFORMATION;    HYDROGEN BONDING;    POLYMORPHISM;   

DOI  :  10.1107/S2056989017015985

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

In the mol­ecules of both (E)-1-{3-[(5-fluoro-2-hy­droxy­benzyl­idene)amino]­phen­yl}ethanone, C15H12FNO2, (I), and (E)-1-{3-[(2-hy­droxy-3-meth­oxy­benzyl­idene)amino]­phen­yl}ethanone, C16H15NO3, (II), which crystallizes with Z′ = 2 in space group Pca21, there are intra­molecular O—H⋯N hydrogen bonds, and the non-H atoms in each mol­ecule are essentially coplanar. In the crystal of (I), mol­ecules are linked by a single C—H⋯O hydrogen bond to form a C(8) chain, whereas in the crystal of (II), mol­ecules 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.

【 授权许可】

CC BY