The variable-temperature 'H and 13C NMR spectra of some N-tosyl diaza crown ethers have been obtained. They are discussed with respect to the preferred conformers of the crowns and the free energies of activation of the interconversional process of the large ring. Both the preferred conformers and t
Conformational Behaviour of N-tosyl-substituted Diaza Crown Ethers
β Scribed by Manuela Grotjahn; Erich Kleinpeter
- Publisher
- Springer-Verlag
- Year
- 1999
- Tongue
- English
- Weight
- 861 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1610-2940
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The synthesis of metal-free and metallo derivatives ( Ni , Zn ) of tetrasubstituted phthalocyanines (Pcs) obtained from 4-[methyleneoxy(15-crown-5)]phthalonitrile is described. The new compounds have been characterized by elemental analyses, IR, ^1^ H and ^13^ C NMR , MS and UV-vis. The thermal stab
The new ditopic receptors 1-3 (Figure 1) have been synthesized and their binding ability for alkaline and transition metal cations has ben investigated by halide and UV-Vis titrations. The recognition of complementary molecules through hydrogen bonding has been studied by IH-NMR. The simultaneous re