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Conformational rigidity and flexibility of the paracyclophane skeleton in substituted [2.2]paracyclophanes

โœ Scribed by Z. A. Starikova; I. V. Fedyanin; M. Yu. Antipin

Publisher
Springer
Year
2004
Tongue
English
Weight
885 KB
Volume
53
Category
Article
ISSN
1573-9171

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## Abstract A conformational equilibrium exists in solution between two skew forms (__s__^+^ and __s__^โˆ’^) of [2.2]paracyclophane (1a). The vicinal coupling constants in the ^1^Hโ€NMR spectra of the bridge protons in the six __ar__โ€monosubstituted derivatives 1bโ€“1g (R๏ฃพCN, NO, Br, CH~3~, CHO, and NO~

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## Abstract The radical anions of the following substituted [2.2]paracyclophanes have been characterized by ESR. and ENDOR. spectroscopy: 4, 16โ€dicyanoโ€ (**__o__**โ€**2**), 4, 12โ€dicyanoโ€ (**__p__**โ€**2**), 4,5,12,13โ€tetracyanoโ€ (**3**) and 4,5,12,13โ€tetrakis (alkoxycarbonyl)โ€ [2.2]paracyclophanes (