CRYSTAL-STRUCTURE AND CIRCULAR-DICHROISM OF (1R,3R,4R), (1R,3R,4R)-(BORNANE 2-ONE,3-YL)-3 BORNANE 2-ONE (DICAMPHOR)

被引：1
|
作者：
LAMAZOUERE, AM
ELBATOUTI, N
SOTIROPOULOS, J
DUPONT, L
GERMAIN, G
机构：
[1] UNIV TOULOUSE 3,CHIM DERIVES SUBST NAT LAB,118 ROUTE NARBONNE,F-31062 TOULOUSE,FRANCE
[2] INST PHYS B5,B-4000 LIEGE,BELGIUM
[3] UNITE CHIM PHYS MOLEC & CRISTALLOG,B-1348 LOUVAIN,BELGIUM
来源：
ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 1994年 / 209卷 / 03期
关键词：
CRYSTAL STRUCTURE; CIRCULAR DICHROISM; DICAMPHOR;
D O I：
10.1524/zkri.1994.209.3.263
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
(+)-Camphor reacts in basic media, with N-sulfinylaniline to give, in good yields, dicamphoquinone, which is hydrogenated to dicamphor. Crystals of dicamphor (C20H30O2) belong to space group P2(1), with a = 6.920(1) angstrom, b = 11.207(1) angstrom, c = 11.516(1) angstrom, beta = 99.62(1)0, z = 2, T = 293 K. The final R is 0.044 for 1113 observed reflections. The cohesion of the crystal is the result of van der Waals interactions. The two camphor moieties in this 1.4-diketone are located in chiral positions with respect to each other. The two carbonyl groups form a right handed helix. The Circular Dicroism (CD) spectrum exhibits two Cotton effects of opposite sign and equal intensities in the region of n --> pi* transition: positive at longer wavelength and negative at shorter wavelength. The nature of CD is discussed.
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收藏
页码：263 / 266
页数：4
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