Dinuclear metal compds. [(LnM)(m-BL·-)(MLn)]k involving radical anions of bridging ligands BL such as 2,2'-azobispyridine or 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine and coordinated inorg. or organometallic complex fragments MLn contg. copper(I), rhenium(I), ruthenium(II), osmium(II), rhodium(III) or iridium(III) were studied in frozen solns. using high field EPR spectroscopy at W band (95 GHz) or higher frequencies. The generally small but still rather variable anisotropy of the g factor shows typical patterns reflecting the specific metal/ligand interactions, the competition between bridging and ancillary ligands for spin d., and the spin-orbit coupling consts. of the metals. The EPR data thus specify the structural data as obtained from x-ray crystallog. for a std. series of diphosphinocopper(I) complexes involving the radical ligands indicated. The (RNNR)·- group can be placed next to the related superoxide (OO)·- as a paramagnetic ligand with specific geometrical and electronic structure. [on SciFinder(R)]
%0 Journal Article
%1 Sarkar.2008b
%A Sarkar, Biprajit
%A Frantz, Stephanie
%A Roy, Sayak
%A Sieger, Monika
%A Duboc, Carole
%A Denninger, Gert
%A Kuemmerer, Hans-Juergen
%A Kaim, Wolfgang.
%D 2008
%J Journal of Molecular Structure
%K ESR azo coupling electronic function orbit radical spin structure
%N 1-3
%P 133--138
%R 10.1016/j.molstruc.2008.04.048
%T High-frequency EPR and structural data as complementary information on stable radical complexes containing the semi-reduced azo function
%V 890
%X Dinuclear metal compds. [(LnM)(m-BL·-)(MLn)]k involving radical anions of bridging ligands BL such as 2,2'-azobispyridine or 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine and coordinated inorg. or organometallic complex fragments MLn contg. copper(I), rhenium(I), ruthenium(II), osmium(II), rhodium(III) or iridium(III) were studied in frozen solns. using high field EPR spectroscopy at W band (95 GHz) or higher frequencies. The generally small but still rather variable anisotropy of the g factor shows typical patterns reflecting the specific metal/ligand interactions, the competition between bridging and ancillary ligands for spin d., and the spin-orbit coupling consts. of the metals. The EPR data thus specify the structural data as obtained from x-ray crystallog. for a std. series of diphosphinocopper(I) complexes involving the radical ligands indicated. The (RNNR)·- group can be placed next to the related superoxide (OO)·- as a paramagnetic ligand with specific geometrical and electronic structure. [on SciFinder(R)]
@article{Sarkar.2008b,
abstract = {Dinuclear metal compds. [(LnM)(\textgreek{m}-BL·-)(MLn)]k involving radical anions of bridging ligands BL such as 2,2'-azobispyridine or 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine and coordinated inorg. or organometallic complex fragments MLn contg. copper(I), rhenium(I), ruthenium(II), osmium(II), rhodium(III) or iridium(III) were studied in frozen solns. using high field EPR spectroscopy at W band (95 GHz) or higher frequencies. The generally small but still rather variable anisotropy of the g factor shows typical patterns reflecting the specific metal/ligand interactions, the competition between bridging and ancillary ligands for spin d., and the spin-orbit coupling consts. of the metals. The EPR data thus specify the structural data as obtained from x-ray crystallog. for a std. series of diphosphinocopper(I) complexes involving the radical ligands indicated. The (RNNR)·- group can be placed next to the related superoxide (OO)·- as a paramagnetic ligand with specific geometrical and electronic structure. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Sarkar, Biprajit and Frantz, Stephanie and Roy, Sayak and Sieger, Monika and Duboc, Carole and Denninger, Gert and Kuemmerer, Hans-Juergen and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/25f09aef9d44dafabe485994be63966f5/huebleriac},
doi = {10.1016/j.molstruc.2008.04.048},
interhash = {cb9ab9bc982a14e9a96caa81c04b771b},
intrahash = {5f09aef9d44dafabe485994be63966f5},
issn = {0022-2860},
journal = {Journal of Molecular Structure},
keywords = {ESR azo coupling electronic function orbit radical spin structure},
number = {1-3},
pages = {133--138},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {High-frequency EPR and structural data as complementary information on stable radical complexes containing the semi-reduced azo function},
volume = 890,
year = 2008
}
