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Chemical shift anisotropy of the anomeric protons in α‐ and β‐ D ‐glucose
Author(s) -
Poppe Leszek,
van Halbeek Herman
Publication year - 1993
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260310712
Subject(s) - chemistry , anomer , anisotropy , chemical shift , relaxation (psychology) , dipole , tensor (intrinsic definition) , analytical chemistry (journal) , nuclear magnetic resonance , crystallography , stereochemistry , organic chemistry , physics , optics , mathematics , psychology , social psychology , pure mathematics
Values for the chemical shift anisotropies of the α‐ and β‐anomeric protons in [1‐ 13 C]‐D‐glucose were measured by ortho‐ROESY and SLOESY experiments using non‐selective and selective 1 H spin‐locking by DANTE pulse trains, respectively. The experiments were performed under the condition ω H τ o ≈ 1, in order to enhance cross‐correlated cross‐relaxation due to interference between 1 H chemical shift anisotropy and 1 H‐ 13 C dipolar interactions. Assuming axial symmetry for the 1 H chemical shift tensor, chemical shift anisotropy values of Δσ H‐1(α) ≈ −6.1 ppm and Δσ H‐1(β) ≈ −2.4 ppm were obtained.