(
2002-10-18)
Kumar, V. S.Senthil; Addlagatta, Anthony; Nangia, Ashwini; Robinson, Ward T.; Broder, Charlotte K.; Mondal, Raju; Evans, Ivana R.; Howard, Judith A.K.; Allen, Frank H.
Small yet subtle conformational changes resulting from the correlated rotation of the geminal phenyl rings in the title compound lead to different crystal packing arrangements and thus different X-ray crystal structures (the four space groups are given in the picture). This provides the simultaneous occurence of conformational polymorphism, conformational isomorphism, and concomitant polymorphism for the same molecule.
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