Paramagnetic hexaborate clusters with mixed halide, halide/hydride substitution were prepd. from oxidizable dianionic precursors and were characterized by cyclic voltammetry, EPR, vibrational and UV-visible spectroscopy. The EPR studies reveal increasing g anisotropy and EPR line-widths on replacing Cl by Br and esp. by I substituents; however, the replacement of one halide by one alkyl (CH3 or CH2CN) or hydride substituent in [B6Hal,R].bul.- causes decreasing radical persistence and g anisotropy. These results indicate a fairly uniform participation of the cluster core and the substituent sphere in the spin distribution as a major factor for the stability of these non-p radicals. [on SciFinder(R)]
%0 Journal Article
%1 Wanner.1999
%A Wanner, Matthias
%A Kaim, Wolfgang
%A Lorenzen, Volker
%A Preetz, Wilhelm.
%D 1999
%J Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences
%K ESR anion anion;Raman anion;hexaborate cluster halide hexaborate prepn;IR radical substituted
%N 9
%P 1103--1108
%R 10.1515/znb-1999-0902
%T Hexaborate cluster radical anions [B6HalnHal'6-n].bul.- and [B6Hal5R].bul.- (Hal, Hal' = Cl, Br, I; R = H, alkyl). Chemical or electrochemical generation, vibrational, UV-Vis and EPR spectroscopy
%V 54
%X Paramagnetic hexaborate clusters with mixed halide, halide/hydride substitution were prepd. from oxidizable dianionic precursors and were characterized by cyclic voltammetry, EPR, vibrational and UV-visible spectroscopy. The EPR studies reveal increasing g anisotropy and EPR line-widths on replacing Cl by Br and esp. by I substituents; however, the replacement of one halide by one alkyl (CH3 or CH2CN) or hydride substituent in [B6Hal,R].bul.- causes decreasing radical persistence and g anisotropy. These results indicate a fairly uniform participation of the cluster core and the substituent sphere in the spin distribution as a major factor for the stability of these non-p radicals. [on SciFinder(R)]
@article{Wanner.1999,
abstract = {Paramagnetic hexaborate clusters with mixed halide, halide/hydride substitution were prepd. from oxidizable dianionic precursors and were characterized by cyclic voltammetry, EPR, vibrational and UV-visible spectroscopy. The EPR studies reveal increasing g anisotropy and EPR line-widths on replacing Cl by Br and esp. by I substituents; however, the replacement of one halide by one alkyl (CH3 or CH2CN) or hydride substituent in [B6Hal,R].bul.- causes decreasing radical persistence and g anisotropy. These results indicate a fairly uniform participation of the cluster core and the substituent sphere in the spin distribution as a major factor for the stability of these non-\textgreek{p} radicals. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Wanner, Matthias and Kaim, Wolfgang and Lorenzen, Volker and Preetz, Wilhelm.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2ae77f50d58710c17e331fac95799030d/b_schwederski},
doi = {10.1515/znb-1999-0902},
interhash = {548e6de9e97f791eb3fb0ae42a3f43ff},
intrahash = {ae77f50d58710c17e331fac95799030d},
issn = {0932-0776},
journal = {Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences},
keywords = {ESR anion anion;Raman anion;hexaborate cluster halide hexaborate prepn;IR radical substituted},
number = 9,
pages = {1103--1108},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {Hexaborate cluster radical anions [B6HalnHal'6-n].bul.- and [B6Hal5R].bul.- (Hal, Hal' = Cl, Br, I; R = H, alkyl). Chemical or electrochemical generation, vibrational, UV-Vis and EPR spectroscopy},
volume = 54,
year = 1999
}
