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Résonance magnétique nucléaire de 13C et 17O d'éthers aliphatiques. Effets γ entre les atomes d'oxygène et de carbone

✍ Scribed by Claude Delseth; Jean-Pierre Kintzinger


Publisher
John Wiley and Sons
Year
1978
Tongue
German
Weight
464 KB
Volume
61
Category
Article
ISSN
0018-019X

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✦ Synopsis


The ^13^C‐ and ^17^O‐chemical shifts of 31 aliphatic ethers are measured and discussed. The ^17^O‐chemical shifts of the ethers ROR′ correlate with chemical shifts for the methylene groups of the corresponding alkanes RCH~2~R′. The constant of proportionality can be related to the orbital expansion term 〈r^−3^〉~2p~. The δ~c~ for carbon atoms can also be correlated with δ~c~ for the corresponding alkanes. The origin of the correlation is discussed taking into account the conformational modifications resulting from introduction of an oxygen atom in an alkyl chain.


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