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http://dx.doi.org/10.5012/jkcs.2003.47.2.109

Electronic Spectroscopy and Ligand Field Analysis of trans-[CrX2([15]aneN4)]+(X=F,CI)  

Jong-Ha Choi (Department of Chemistry, Andong National University)
In-Gyung Oh (Department of Chemistry, Andong National University)
Sang Hak Lee (Department of Chemistry, Kyungpook National University)
Yu Chul Park (Department of Chemistry, Kyungpook National University)
Publication Information
Journal of the Korean Chemical Society / v.47, no.2, 2003 , pp. 109-114 More about this Journal
Abstract
The electronic absorption spectra of trans-$[CrX_2([15]aneN_4)]ClO_4\;([15]aneN_4$=1,4,8,12-tetraazacyclopentadecane; X=F, Cl) complexes have been interpreted using the ligand field theory. An AOMX program is used to optimize the differences between the calculated and the observed positions for the spin-allowed transition bands. The crystal field theory(CFT) parameter is directly related to the angular overlap model(AOM), normalized spherical harmonic hamiltonians(NSH), and semiempirical parameters. The various ligand field parameters are discussed in terms of their chemical significances. According to the ligand field analysis, we can confirm that the fluoride ligand is a very strong ${\sigma}-$ and ${\pi}-$donor while the chloride has weak ${\sigma}-$ and ${\pi}-$donor properties toward chromium(III) ion.
Keywords
Cr(III)Complex; Electronic Transition; Ligand Field Analysis; [15]ane$N_4$;
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