بخشی از متن فایل word Ab Initio Calculations of Two Different Structures (Polymorphs) of 4-NC5H4C(O)NHP(O)[NH–C(CH3)3]2 :
سال انتشار : 1394
نام کنفرانس یا همایش : هجدهمين همايش شيمي فيزيک ايران
تعداد صفحات :4
Formation of polymorphs is important phenomenon because of their different pharmaceuticalproperties  and many drugs receive regulatory approval for only a single crystal form orpolymorph. An illustrious sample of polymorphism effect on real pharmaceutical problems isthe ritonavir (an important AIDS drug), the Abbott compound . Ab initio studies are ofgreat interest in recent years because of its ability to obtain a variety of important molecularquantities such as electron density distribution, reactivity, structure, and energy . In thiswork, Ab initio calculations were performed to optimize two different structures(polymorphs), a and b, of a carbacylamidophosphate, 4-NC5H4C(O)NHP(O)[NH–C(CH3)3]2.