Near-degeneracy between the low- and high-spin states in an alternant hydrocarbon diradical: topology and geometry

Autor:	Andrzej Rajca, Suchada Utamapanya, Donald J. Smithhisler
Rok vydání:	1993
Předmět:	Spin states Diradical Chemistry Magnetometer Organic Chemistry Molecular physics Magnetic field law.invention Magnetization Nuclear magnetic resonance Alternant hydrocarbon Mean field theory law Intramolecular force
Zdroj:	The Journal of Organic Chemistry. 58:5650-5652
ISSN:	1520-6904 0022-3263
DOI:	10.1021/jo00073a024
Popis:	Treatment of polyarylmethyl diethers with lithium metal in THF gave the corresponding carbodianions; subsequent oxidation with iodine at 180 K produced diradicals, which were studied in frozen THF solutions by SQUID magnetometry in the 2-100 K temperature and 0-5.5 T magnetic field ranges. Magnetization dependence on both the temperature and magnetic field was compared to the model based upon the Heisenberg Hamiltonian plus mean field. Small intramolecular magnetic interactions were found; both diradicals are triplet ground states
Databáze:	OpenAIRE
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