title: 1-Phenyl-3-(pyrid-2-yl)benzo[e][1,2,4]triazinyl: the first "Blatter radical" for coordination chemistry.
abstract: A neutral air- and moisture-stable N,N'-chelating radical ligand, 1-phenyl-3-(pyrid-2-yl)benzo[e][1,2,4]triazinyl (1) was synthesized and characterized by electron paramagnetic resonance spectroscopy, X-ray crystallography, and magnetic measurements. Subsequent reaction of 1 with Cu(hfac)2·2H2O (hfac = hexafluoroacetylacetonate) under ambient conditions afforded the coordination complex Cu(1)(hfac)2 in which the radical binds to the metal in a bidentate fashion. Magnetic susceptibility data collected from 1.8 to 300 K indicate a strong ferromagnetic metal-radical interaction in the complex and weak antiferromagnetic radical···radical interactions between the Cu(1)(hfac)2 units. Detailed computational investigations support this assignment. Radical 1 is a new addition to the growing library of 1,2,4-triazinyl radicals and the first member of this family of paramagnetic species synthesized specifically for coordination purposes.
authors: Department of Chemistry, University of Jyväskylä , P.O. Box 35, FI-40014 Jyväskylä, Finland.
authors: Ian S
authors: IS
authors: Morgan
authors: Anssi
authors: A
authors: Peuronen
authors: Mikko M
authors: MM
authors: Hänninen
authors: Robert W
authors: RW
authors: Reed
authors: Rodolphe
authors: R
authors: Clérac
authors: Heikki M
authors: HM
authors: Tuononen