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Chelate ring effects in 95 Mo NMR spectroscopy
Author(s) -
Alyea Elmer C.,
Somogyvari Arpad
Publication year - 1986
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.1260240417
Subject(s) - chemistry , chelation , phosphine , ring (chemistry) , molybdenum , nuclear magnetic resonance spectroscopy , spectroscopy , arsenic , nitrogen , chemical shift , crystallography , inorganic chemistry , stereochemistry , organic chemistry , physics , quantum mechanics , catalysis
Abstract Ring contributions (δ R ) to the chemical shift in 95 Mo NMR spectroscopy are defined for some molybdenum(0) complexes of chelating phosphine ligands. The chelate ring effect is greatest for five‐membered rings, with the 95 Mo resonances being shielded by ca 120 ppm for the ditertiary phosphine complexes. Experimental estimates of δ R R ( 95 Mo) are also reported for five‐membered rings containing nitrogen and arsenic donor ligands.