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.

引用

页码：263 / 266

页数：4

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