## Abstract The methoxy group conformation of chromone derivatives was studied by ^1^H NMR methods. For the qualitative determination of the conformational preferences of the model compounds, proton relaxation rates, spinโspin decoupling difference spectroscopy and 2D COSY experiments were applied.
โฆ LIBER โฆ
The NMR analysis of the methoxy-group conformation in 4-methoxy-2-nitroaniline
โ Scribed by R.H. Contreras; D.G. De Kowalewski; J.C. Facelli
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 188 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0022-2860
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## Abstract The absence of H๏ฃฟH couplings between the methoxy group and the ring protons observed in 2โmethoxyโ, 2,6โdimethoxyโ and 2โmethoxyโ6โchloropyridines is interpreted in terms of a __cis__ conformation between the methyl fragment and the nitrogen ring atom. Other data, taken from the current