ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
The Radical and Ion-Radical Mechanism of Polymerization
of 2,6-Xylenol. II. The Reactivity of Aryloxy Radicals with Соррег(П) Complexes
A. Tkáč and J. Kresta
Institute of Chemical Physics, Department of Physical Chemistry,
Slovak Technical University, Bratislava 1
Abstract: Free tri-čerč-butyl-phenoxy radical was used as model compound for
studying the reactivity of aryloxy radicals with Cu(II)-cyclohexylamině
complexes (as homogeneous catalyst of oxidative coupling of 2,6-dimethylphenol).
The analysis of the EPR signals leads to the conclusion that electron
transfer from the free radical to Cu(II) takes place if Cu(II) is not fully
coordinated with eyelohexylamině. In complexes with the copper atom
firmly bound in chelate groups (ethylacetylacetonate) no electron transfer
occurs. Not only the tri-tert-butyl-, but also the polymer phenoxy radicals
react very effectively with the catalytic Cu(II)-cyclohexylamine complexes.
The polymer phenoxy radical in contrast with the tri-tert-butyl radical is
not reactive with CuCI2 molecules.
Full paper in Portable Document Format: 251a3.pdf
Chemical Papers 25 (1) 3–8 (1971)