Abstract
[2.2.2]Metacyclophane (MCP) tweezers 7 and azo[2.2.2]MCP tweezers 8 were prepared from 21-nitro[2.2.2]MCP 2, which was obtained by the ipso-nitration of [2.2.2]MCP 1. X-Ray crystal structural analysis shows the MCP tweezers 7 to have the anti-conformation. The photothermal isomerization of azo[2.2.2]MCP tweezers 8 was studied by UV spectroscopy, and the activation energy of the thermal cis-trans isomerization was determined by UV measurements at variable temperatures to be E‡ = 71 ± 7 kJ mol-1. The complexation constant of 8 with silver ions was determined by the Benesi-Hildebrand method to be 73 ± 3 L mol-1.
Original language | English |
---|---|
Pages (from-to) | 2623-2627 |
Number of pages | 5 |
Journal | Journal of the Chemical Society, Perkin Transactions 1 |
Issue number | 16 |
DOIs | |
Publication status | Published - 2000 |
Externally published | Yes |
ASJC Scopus subject areas
- Chemistry(all)