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183 W NMR spectroscopy of W(VI) imidoaryl and imidoalkyl complexes using inverse detection based on non‐specific long‐range interactions
Author(s) -
Macchioni Alceo,
Pregosin Paul S.,
Rüegger Heinz,
van Koten Gerard,
van der Schaaf Paul A.,
Abbenhuis Rob A. T. M.
Publication year - 1994
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.1260320409
Subject(s) - chemistry , octahedron , ligand (biochemistry) , nuclear magnetic resonance spectroscopy , coordination number , crystallography , chemical shift , spectroscopy , computational chemistry , stereochemistry , crystal structure , organic chemistry , ion , physics , quantum mechanics , biochemistry , receptor
183 W NMR spectra for a series of octahedral W(VI) imidophenyl, ‘WNPh’ and W(VI) imidoethyl, ‘WNEt,’ complexes were obtained using inverse detection based on non‐specific long‐range interactions. The metal couples to both the ortho and para protons of the NPh moiety (four and six bonds, respectively). The 183 W shift is shown to be sensitive to the nature of the ligand and the coordination number. The effect of geometric isomerism on δ 183 W is shown to be several hundred ppm. Some δ 14 N and δ 15 N and 1 J ( 183 W, 15 N) data are reported. A number of new geometric isomers, involving the position of the NR ligand with respect to the remaining ligands, have been identified.