Evaluation of absolute configuration of naphthylphenyl-substituted oligosilanes by CD exciton chirality method
- 9 February 2003
- Vol. 15 (3) , 231-237
- https://doi.org/10.1002/chir.10192
Abstract
Absolute configurations of methylnaphthylphenyl-substituted oligosilanes, MeNpPhSi*SiMeR1R2 [2 (R1, R2=Me), 3 (R1=Me, R2=Ph), 4 (R1, R2=Ph), and 5 (R1=Me, R2=SiMe3)] were predicted by circular dichroism (CD) exciton chirality method. The σ–π conjugation effect of oligosilylene units (σ-linkage) with π-electron systems caused an intense red-shift of 1La,Ph transition band of the oligosilanes as shown in UV/VIS and made it possible to observe clear CD exciton chirality between the two aromatic chromophores on chiral silicon atom. Chirality 15:231–237, 2003.Keywords
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