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The effect of the internal reference on ASIS correlations: 1—Formyl protons of p ‐X‐benzaldehydes
Author(s) -
Bertrán J. Fernández,
Rodríguez Mario
Publication year - 1983
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/omr.1270210103
Subject(s) - proton , benzaldehyde , electromagnetic shielding , linear correlation , chemistry , gauge (firearms) , analytical chemistry (journal) , physics , mathematics , materials science , nuclear physics , organic chemistry , catalysis , statistics , quantum mechanics , metallurgy
The correlation of the ASIS of the formyl protons of benzaldehyde and six of its p ‐X‐derivatives in 12 aromatic solvents show marked deviations. Evidence is presented that these deviations are caused by variations in the shielding of the internal reference protons caused by aromatic solvents. Equations are developed which gauge the effect of TMS on the linear correlations of proton ASIS.