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Electron paramagnetic resonance investigation of the complexes of grignard reagents with 9,10‐phenanthrenesemiquinonate
Author(s) -
Pan Kai,
Cheng KungLung,
Ho TongIng
Publication year - 1995
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.1260330705
Subject(s) - chemistry , hyperfine structure , reagent , substituent , magnesium , electron paramagnetic resonance , proton nmr , paramagnetism , crystallography , computational chemistry , stereochemistry , nuclear magnetic resonance , organic chemistry , atomic physics , condensed matter physics , physics
The substituent effect on the proton hyperfine splitting constants (hfsc) of the charge‐transfer complexes of Grignard reagents (RMgBr, R = CH 3 , C 2 H 5 , CH 3 CHCH) with seven 3‐substituted 9,10‐phenanthroquinones is reported. A back‐donation bonding interaction between phenanthrenesemiquinonate anion radical π * and the magnesium p orbital is revealed by the hfsc analysis.