The "N NMR chemical shifts of eight substituted pyridine N-oxides (B) and their complexes (AHB) with methanol and dichloroacetic and trifluoromethanesulfonic acids were measured in chloroform-d at the natural abundance level. The measured chemical shifts are strongly affected by substituents, hydrog
β¦ LIBER β¦
Computational study of structures and proton transfer in hydrogen-bonded ammonia complexes using semiempirical valence-bond approach
β Scribed by Youliang Wang; John R. Gunn
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 235 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0020-7608
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β¦ Synopsis
to proton transfer, even though they are isoelectronic systems.
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Whenever hydrogen bonding is involved in molecular recognition, the possibility of a proton transfer from the donor to the acceptor arises. In most cases the pK a of the donor is far enough above the pK a of the conjugate acid of the acceptor for it to be clear that no proton transfer will occur. Ho