Preparation of and dynamic gearing in cis-1,2-bis(9-triptycyl)ethylene
β Scribed by Yuzo Kawada; Hiromi Sakai; Makoto Oguri; Gen Koga
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- French
- Weight
- 289 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Resolution of the dl isomers of bis(Z-and 3-chloro-9-triptycyl)methanes and ethers into the optical antipodes has been achieved by hplc using a column of the silanized silica gel coated with chiral poly(triphenylmethy1 methacrylate).
The quantum yields of fluorescence, triplet formation and trans-+cis photoisomerization (@r, 0r and @\_,) of the title compounds (H,C-and H&O-StA) were measured in several solvents at room temperature. The respective values in acetonitrile are @r=O.20 and 0.03, &LO. 18 and 0.02, @J,\_~=O. 12 and 0.2
## Abstract It is shown that ligand **1**, designed to span __trans__βpositions, under appropriate conditions also gives __cis__βmononuclear complexes of platinum (II). The structure of __cis__β[PtCl~2~ **(1)**] **(2)** has been determined by singleβcrystal Xβray diffraction. The major distortion f