Concomitant polymorphs of 1,3-bis(3-fluorophenyl)urea.
Acta crystallographica. Section C, Structural chemistry(2016)
摘要
Hydrogen bonding between urea functionalities is a common structural motif employed in crystal-engineering studies. Crystallization of 1,3-bis(3-fluorophenyl)urea, C13H10F2N2O, from many solvents yielded concomitant mixtures of at least two polymorphs. In the monoclinic form, one-dimensional chains of hydrogen-bonded urea molecules align in an antiparallel orientation, as is typical of many diphenylureas. In the orthorhombic form, one-dimensional chains of hydrogen-bonded urea molecules have a parallel orientation rarely observed in symmetrically substituted diphenylureas.
更多查看译文
关键词
Hirshfeld surface analysis,crystal structure,diphenylurea,fluorine,hydrogen-bonding motifs,polymorph
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络