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  Multiple pulse study of the proton shielding in single crystals of maleic acid

Grosescu, R., Achlama, A. M., Haeberlen, U., & Spiess, H. W. (1974). Multiple pulse study of the proton shielding in single crystals of maleic acid. Chemical Physics, 5(1), 119-128. doi:10.1016/0301-0104(74)80011-X.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-E510-E Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-E511-C
Genre: Journal Article

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ChemPhys_5_1974_119.pdf (Any fulltext), 740KB
 
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 Creators:
Grosescu, R.1, Author           
Achlama, A. M.1, Author           
Haeberlen, Ulrich2, Author           
Spiess, Hans W.3, Author           
Affiliations:
1Max Planck Institute for Medical Research, Max Planck Society, ou_1125545              
2Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society, ou_1497739              
3Emeritus Group Spiess: Polymer Spectroscopy, MPI for Polymer Research, Max Planck Society, ou_1800296              

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 Abstract: The proton NMR in single crystals of maleic acid has been studied by means of multiple pulse line-narrowing techniques. The magnetic shielding tensors of the four magnetically inequivalent protons forming hydrogen bonds could be determined independently. The transferability of the magnetic shielding tensor is put forward as a physical index of the hydrogen bond. The connection between the principal directions of the shielding tensors and the bond directions is demonstrated and used as a means to obtain refined hydrogen positions in the crystal structure. Only one composite line of the olefinic protons could be observed. Its analysis in terms of the individual tensors of the olefinic protons suggests that the double bond principal directions are reflected in those of the shielding tensors in contradistinction to the single bond systems. The origin of this effect is discussed.

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Language(s): eng - English
 Dates: 1974-03-042002-01-091974-07
 Publication Status: Issued
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0301-0104(74)80011-X
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Title: Chemical Physics
  Other : Chem. Phys.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 5 (1) Sequence Number: - Start / End Page: 119 - 128 Identifier: ISSN: 0301-0104
CoNE: https://pure.mpg.de/cone/journals/resource/954925509371