Synthesis of Alkynylbenzo-15-crown-5 Ethers.
β Scribed by S. V. Klyatskaya; E. V. Tret'yakov; S. F. Vasilevsky
- Publisher
- John Wiley and Sons
- Year
- 2003
- Weight
- 131 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0931-7597
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Photochromism / Photoresponsive crown ether Photosensitive crown ether 1 composed of 1,8a-dihydroazulene as a photodynamic unit and a benzo[l5]crown-5 ether subgroup has been synthesized from C-Tsubstituted cycloheptatriene 8, which has been obtained by nucleophilic addition of 4-acetylbenzo[l5]crow
Complexes between the heavier lanthanoid nitrates Ln(NO~3~)~3~ and 15βcrownβ5 (**1**) and 18βcrownβ6 (**2**) ethers were isolated and characterized. Both 1:1 and 4:3 complexes are formed with each Ln(III) ion, except in the case of Gd and **2**. The thermal transformation of the 1:1 complexes into t
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract Complexes of lanthanoid trinitrates Ln(NO~3~)~3~ with 15βcrownβ5 ether **1** (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd) and with 18βcrownβ6 ether **2** (Ln = La, Ce, Pr, Nd) having a 1:1 stoichiometry as well as 4:3 complexes with **2** (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd) have been synthesized and