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oai:ojs.www.eurjchem.com:article/933 2014-03-31T01:48:51Z eurjchem:ART driver

Crystal structures of racemic and enantiomeric 5-isopropyl-5-methylhydantoin Ichitani, Masaki Kitoh, Soh-ichi Tanaka, Keiko Fujinami, Shuhei Suda, Mitsuhiro Honda, Mitsunori Kunimoto, Ko-Ki Hydantoin Enantiomer Conglomerate Crystal structure Racemic compound Imidazolidine-2 4-dione Crystal structures of racemic and enantiomeric 5-isopropyl-5-methylhydantoin (IPrMH) have been determined by single crystal X-ray diffraction. Melting temperatures and solid state infrared spectra are also measured. Racemic IPrMH has a lower melting temperature than the pure enantiomer by 25 °C. The infrared spectrum of racemic IPrMH is identical with that of the pure enantiomer. Nevertheless, the racemic IPrMH doesn’t crystallize as a conglomerate but as a racemic compound. The racemic and the enantiomeric crystals are very similar to each other in molecular geometries and intermolecular interactions. In the both cases, the molecules are connected via N−H···O hydrogen bonds to form R22(8) rings, and these rings are linked into infinite one-dimensional tapes. In the racemic crystal, a single tape is composed of single enantiomer and itself is homochiral. Atlanta Publishing House LLC 2014-03-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf application/octet-stream application/octet-stream https://www.eurjchem.com/index.php/eurjchem/article/view/933 10.5155/eurjchem.5.1.6-10.933 European Journal of Chemistry; Vol. 5 No. 1 (2014): March 2014; 6-10 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/933/PDF_933 https://www.eurjchem.com/index.php/eurjchem/article/view/933/2551 https://www.eurjchem.com/index.php/eurjchem/article/view/933/2552