作者:Pamela Girgis Takla、Christos J Dakas
DOI:10.1111/j.2042-7158.1989.tb06440.x
日期:2011.4.12
Infrared data determined for known polymorphic forms and some new derivatives of acetohexamide and related compounds support the view that acetohexamide polymorphs exhibit keto-enol tautomerism. They indicate that type A polymorphs exist in the enol form, probably stabilized by intramolecular bonding between an O-H and S = O group to form a six-membered ring. Type B polymorphs exist in the keto form
确定的已知多晶型物形式和一些新的乙酰己酰胺衍生物和相关化合物的红外数据支持以下观点:乙酰己酰胺多晶型物表现出酮-烯醇互变异构现象。他们表明A型多晶型物以烯醇形式存在,可能通过OH和S = O基团之间的分子内键合形成六元环而稳定。B型多晶型物以酮形式存在,脲羰基分子间键合到磺酰胺NH上。新证据反驳了先前对数据的解释。