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Structure–Magnetism Relationships in α ‐Nitronyl Nitroxide Radicals
Author(s) -
Deumal Mercè,
Cirujeda Joan,
Veciana Jaume,
Novoa Juan J.
Publication year - 1999
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(19990503)5:5<1631::aid-chem1631>3.0.co;2-6
Subject(s) - magnetism , synthon , antiferromagnetism , nitroxide mediated radical polymerization , orientation (vector space) , crystallography , molecule , diagram , condensed matter physics , chemistry , materials science , chemical physics , stereochemistry , physics , geometry , mathematics , nuclear magnetic resonance , monomer , organic chemistry , radical polymerization , statistics , polymer
Statistical analysis of the packing of all known α ‐nitronyl nitroxide crystals (see diagram) with dominant ferro‐ and antiferromagnetic properties shows that there are no differences in the geometrical distribution of the NO⋅⋅⋅ON, C(sp 3 )−H⋅⋅⋅O−N and C(sp 3 )−H⋅⋅⋅O−N contacts in these two subsets. The magnetic properties are a result of the relative orientation of the molecules, that is, of their packing patterns (or synthons) and not of the geometry of an individual contact.