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The ESR spectrum of a hydrazyl RṄNNH2) radical

✍ Scribed by L. Muszkat

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
253 KB
Volume
18
Category
Article
ISSN
0009-2614

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✦ Synopsis

An ESR study of @radiated sin_rle c.rystals of cyanoacotyl hydrazide indicates that the free radical formed is the corresponding hydrazyl (NCCH,CONNH,), in which a large fraction of UIC unpaired spin density is located on the a-nitiogcn atom.

Stable triaryl substituted hydrazyl free radicals R, -N, -Np '2s have been widely investigated by ESR spectroscopy both in solution and in the solid phase [l-3] . In these radicals the unpaired spin density is strongly delocalized over the @nitrogen (NJ and over the aromatic group Rl. In this paper ,we wish to describe the ESR spectrum of a .monosubsti?rted hydrazyl, cyanoacetyl hydrazyl NCCH,CON,-NpH2 in which a large fraction of the unpaired spin density resides on a Zp, orbital localized on N,. We have studied this radical in single crystais of cyanoacetyl hydrazide (NCCH2CGNHNH& y-irradiated at room temperature. The ESR spectra

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