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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 14, Number 3
BKCSDE 14(3)
March 20, 1993

Title	Sharp-Line Electronic Spectroscopy and Ligand Field Analysis of cis-(1,4,8,11-Tetraazacyclotetradecane)(ethylenediamine)chromium(Ⅲ)
Author	Jong-Ha Choi*, In-Gyung Oh
Keywords
Abstract	The 77 K luminescence and excitation, room-temperature visible spectra of cis-[Cr(cyclam)(en)](ClO4)3 (cyclam = 1,4,8,11-tetraazacyclotetradecane, en=ethylenediamine) have been measured. It is found that the zero-phonon line in the excitation spectrum splits into two components by 40 cm-1. The eight pure electronic bands due to spin-allowed and spin-forbidden transitions are assigned. Ligand field parameter set for the complex has been determined from broad band and sharp-line electronic spectra by means of modern ligand field theory based on the angular overlap model. As expected, the results of the optimization indicate that the nitrogen atoms of en and cyclam have a strong σ-donor property toward chromium(Ⅲ).
Page	348 - 352
Full Text	PDF

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