## Abstract A new type of crown ethers containing a diphenyl ether unit has been prepared, the ring size ranging from 12 to 36. ^1^H and ^13^C NMR spectra of both free ligands and their metal‐ion complexes have been recorded. For 18‐ and 21‐membered compounds a general downfield shift was observed
1H and 13C NMR studies on nitrosonaphthols, and their complexation with the dioxouranium(VI) ion
✍ Scribed by Anto Vainiotalo; Jouko Vepsäläinen
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 434 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
The 'H and I3C NMR spectra of l-nitroso-2-naphthol and its disodium 3,ddisulphonate, 2-nitroso-l-naphthol and its sodium 4-sulphonate and the complexes of the sulphonated ligands with dioxouranium(VI) were recorded and analysed. The results show the nitrosonaphthols exist predominantly in the oxime form, and that the l-nitroso compounds have a preferred structure. The quinonoid oxygen does not take part in the complexation with dioxouranium(VI), which is effected by chelation through the oxime oxygen and nitrogen.
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