## Abstract A series of double armed diaza‐15‐crown‐5 ethers **(9a ‐ 16a)** and diaza‐18‐crown‐6 ethers **(9b ‐ 16b)** have been prepared by the Mannich reaction of 2,6‐disubstituted phenols with the corresponding __N,N__'‐dimethoxymethyldiaza‐crown ethers in benzene. The crystal structures of the
The syntheses and complexing properties of oxo-12-crown-3 and oxo-18-crown-5
✍ Scribed by Geoffrey D. Beresford; J. Fraser Stoddart
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- French
- Weight
- 310 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
Derivatives of 12-crown-4
and 18-crown-6 in which one of the ethereal occlJgens is replaced by a CO group have been synthesised and their cornplexing abilities towards both metal and organic cations have been assessed. VariabLe temperature lH decotq,Zed 13C n.m.r. spectmswpy reveals the presence of anisometric species in solution when a I:1 complex is formed between 0x0-ld-cronr-5 and ISI+hChWeNH3+ClO~-.
📜 SIMILAR VOLUMES
## Abstract A series of monoaza‐15‐crown‐5 ethers (2b‐2h) having 4′‐hydroxy‐3′,5′‐disubstituted benzyl groups have been prepared by the Mannich reaction of 2,6‐disubstituted phenols with the corresponding __N__‐methoxymethylmonoaza‐crown ethers. Competitive transport through a chloroform membrane b
## Abstract Complexes of lanthanoid trinitrates Ln(NO~3~)~3~ with 15‐crown‐5 ether **1** (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd) and with 18‐crown‐6 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