10.1021/ja029236o.s001
Shijun Zheng
Shijun
Zheng
Jie Lan
Jie
Lan
Saeed I. Khan
Saeed I.
Khan
Yves Rubin
Yves
Rubin
Synthesis, Characterization, and Coordination Chemistry of
the 2-Azaphenalenyl Radical
American Chemical Society
2003
measurement
azaphenalenyl
Coordination Chemistry
ESR spectroscopy
propensity
dimerize
bond dissociation enthalpy
phenalenyl
kcal
2003-04-19 00:00:00
Dataset
https://acs.figshare.com/articles/dataset/Synthesis_Characterization_and_Coordination_Chemistry_of_the_2-Azaphenalenyl_Radical/3647646
The 2-azaphenalenyl radical <b>2</b> has been synthesized and characterized by ESR spectroscopy.
Variable-temperature ESR measurements were carried out on both the phenalenyl (<b>1</b>) and the 2-azaphenalenyl (<b>2</b>) radicals. The phenalenyl radical <b>1</b> has the known propensity to dimerize at temperatures
below 20 °C, but unexpectedly less so than originally reported. The first experimental measurement of
bond dissociation enthalpy for the dimerization of the phenalenyl radical <b>1</b> was obtained in CCl<sub>4</sub> (11.34 ±
0.11 kcal/mol) and toluene (9.8 ± 0.7 kcal/mol). The 2-azaphenalenyl radical <b>2</b> does not show a propensity
to dimerize over the measurable temperature range (220−330 K), but does so in the presence of Cu(hfac)<sub>2</sub>
(hfac = hexafluoroacetylacetonate). The latter complex was characterized by X-ray crystallography.