X-ray structure and computational study for N-acryloyl-l-valine, a versatile monomer for preparing smart drug delivery carriers
作者:Gabriella Tamasi、Mario Casolaro、Renzo Cini
DOI:10.1016/j.molstruc.2012.06.051
日期:2012.12
whereas the C O bond distances at carboxylic group are 1.200(3) and 1.303(3) A, respectively allowing an easy assignment of protonation site. The molecule has been theoretically analyzed via the methods of density functional theory DFT and semi-empirical quantum mechanics at PM3 level (SEQMPM3) in order to examine the conformational surface at the gas phase and in the presence of solvent molecules
摘要 通过 l-缬氨酸与丙烯酰氯在碱性溶液中的酰化反应合成了标题化合物 (NAV)。X 射线晶体和分子结构在 P212121 空间群中得到解析和细化,特征在于几乎共面的 H2C CH C( O) N( H) C 系统、CCCN、CCCO 和 (C )CC( O) N( H) 扭转角为 +anti periplanar (+ap) (trans, +172(1)°), -syn periplanar (-sp, cys) (-8(1)°) 和 (-ap, trans) ( −175(1)°)。羧基平面几乎垂直于酰胺平面(二面角:83(1)°),OCC(H)N(H)扭转角为-sp,cys(-28(1)°)。酰胺处的 CO 键距为 1.240(3) A,而羧基处的 CO 键距分别为 1.200(3) 和 1.303(3) A,从而可以轻松指定质子化位点。通过密度泛函理论 DFT 和 PM3 水平的半经验量子力学