Dimormorphism and cocrystal formation of 3-(chloroacetamido)pyrazole
作者： Menahem Kaftory , Mark Botoshansky , Yana Sheinin
DOI: 10.1021/CG0501229
关键词: Polymorphism (materials science) 、 Molecule 、 Hydrogen bond 、 Chloroacetic acid 、 Cocrystal 、 Stereochemistry 、 Dimer 、 Crystallography 、 Chemistry 、 Pyrazole 、 Hydrogen
摘要: 3-(Chloroacetamido)pyrazole (4) crystallizes in two different forms. Crystallization with chloroacetic acid reveals a cocrystal. In the polymorphs (4a and 4β), all hydrogen acceptors donors take part formation of bonds. both structures, molecules formed dimers through bonds; 4a site symmetry dimer is 2-fold axis, it has bowl shape. The (4β) inversion center, planar. (in 4a) imposed on four that are bonded to propeller-like arrangement up down alternately regards plane dimer. When present respect cocrystal, molecular compound between molecule 3-(chloroacetamido)pyrazole acid. also other same kind form an infinite layered ribbon.
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