CONFORMATIONAL INVESTIGATIONS OF 5-SUBSTITUTED ISOPROPYLIDENE MALONATES 1. STRUCTURE OF 5-(α-PHENYLETHYL)-2,2-DIMETHYL-l,3-DIOXAN-4,6-DIONE

作     者：Thomas C.W.Mak 

作者机构：New Territories shatin The Chinese University of Hong Kong Department of Chemistry 

出 版 物：《Chinese Journal of Structural Chemistry》 (结构化学(英文版))

年 卷 期：1985年第2期

页      面：107-110页

主　　题：CONFORMATIONAL INVESTIGATIONS OF 5-SUBSTITUTED ISOPROPYLIDENE MALONATES 1 DIMETHYL-l,3-DIOXAN-4,6-DIONE PHENYLETHYL STRUCTURE OF 5 Chen 

摘      要：, Mr=248.28, monoclinic, P2!/n, a=ll.394（4）, b=5.770（1）, c=20.534（6） &, (3=106.09（2）? V=1297.1（4） X3, Z=4, 1^=1.265, Dx=l.271 Mgm’3, y（Moka）=0.87cm, F（000）=527.94, 295K. The structure was solved by direct methods and refined to R=0.057 for 1984 observed Moka reflections. The 1,3-dioxan-4,6-dione ring shows a twist-boat conformation with the a-phenylethyl group occupying a bow position. , . .