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Evaluation of absolute configuration of naphthylphenyl‐substituted oligosilanes by CD exciton chirality method
Author(s) -
Oh HyunShik,
Imae Ichiro,
Kawakami Yusuke
Publication year - 2003
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.10192
Subject(s) - chirality (physics) , chemistry , circular dichroism , exciton , chromophore , absolute configuration , stereochemistry , crystallography , photochemistry , physics , condensed matter physics , chiral symmetry , quantum mechanics , nambu–jona lasinio model , quark
Absolute configurations of methylnaphthylphenyl‐substituted oligosilanes, MeNpPhSi*SiMeR 1 R 2 [ 2 (R 1 , R 2 =Me), 3 (R 1 =Me, R 2 =Ph), 4 (R 1 , R 2 =Ph), and 5 (R 1 =Me, R 2 =SiMe 3 )] 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 1 L a,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. © 2003 Wiley‐Liss, Inc.