Carceroisomerism and twistomerism in C-4v tetraoxatetrathiahemicarceplexes

Authors
Paek, K Ihm, H Yun, S Lee, HC
Citation
K. Paek et al., Carceroisomerism and twistomerism in C-4v tetraoxatetrathiahemicarceplexes, TETRAHEDR L, 40(50), 1999, pp. 8905-8909
Citations number
9
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
TETRAHEDRON LETTERS
ISSN journal
00404039 → ACNP
Volume
40
Issue
50
Year of publication
1999
Pages
8905 - 8909
Database
ISI
SICI code
0040-4039(199912)40:50<8905:CATICT>2.0.ZU;2-C
Abstract
Four new C-4v tetraoxatetrathiahemicarceplexes were synthesized and charact erized. Their carceroisomers and half-twistomers were simultaneously observ ed by H-1 NMR spectra at low temperature. The largest isomerization energy barrier of carceroisomers was 15.5 kcal mol(-1) and the isomerization energ y barriers of twistomers are significantly larger than those of carceroisom ers. (C) 1999 Elsevier Science Ltd. All rights reserved.