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2‐[ p ( N‐tert ‐butyl‐ N ‐oxyamino)phenyl]‐4,4,5,5‐tetramethyl‐4,5‐dihydroimidazol‐3‐oxide‐1‐oxyl, a Stable Diradical with a Triplet Ground State
Author(s) -
Inoue Katsuya,
Iwamura Hiizu
Publication year - 1995
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199509271
Subject(s) - diradical , chemistry , nitroxyl , magnetic moment , oxide , ground state , planar , crystallography , stereochemistry , medicinal chemistry , photochemistry , condensed matter physics , physics , organic chemistry , singlet state , atomic physics , computer graphics (images) , computer science , excited state
A value of 2.71 μ B for the effective magnetic moment between 100 and 300 K is determined for 1 . This magnetic moment supports the assumption of a triplet ground state for 1 . The bis(nitroxyl) diradical, which melts only at 180 °C with decomposition, could be characterized by X‐ray crystallography. It has a distinctly more planar conformation than the analogous monoradicals.