Imposition of chirality in a dinuclear triple-stranded helicate by ion pair formation

被引:58
作者
Yeh, RM [1 ]
Ziegler, M [1 ]
Johnson, DW [1 ]
Terpin, AJ [1 ]
Raymond, KN [1 ]
机构
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
关键词
D O I
10.1021/ic001215c
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Tunable chiral induction and complete determination of chirality in a dinuclear triple helicate, [Ga(2)1(3)](6-) (1 = N,N ' -bis(2,3-dihydroxybenzoyl)-1,4-phenylenediamine, an achiral ligand) is achieved by the use of a chiral counterion. The counterion, (S)-N-methylnicotinium (s-nic), has stereospecific interactions with the helicate. The energy difference, DeltaG, between the Lambda Lambda and Delta Delta helicates in the asymmetric environment afforded by enantiopure s-nic is about 1.1 (+/-0.2) kcal/mol.
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页码:2216 / +
页数:3
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