Nature of the Electronic Ground State in Tris(2-chlorophenanthroline)iron(II) Perchlorate and Related Complexes

Author

William Michael Reiff
Gary J. Long, Missouri University of Science and TechnologyFollow

Abstract

The orbital and spin ground states of [Fe(2-Cl(phen))₃](ClO₄)₂ (phen = phenanthroline) and related high-spin ferrous complexes have been studied using Mössbauer spectroscopy. The temperature dependence of the Mössbauer spectrum of [Fe-(2-Cl(phen))₃](ClO₄)₂ over the range 300-4.2°K indicates the system to have a ground spin quintet contrary to the results of a recent susceptibility study in which a high-spin to low-spin equilibrium is assumed. Magnetically perturbed Mössbauer spectra of the 2-Cl complex as well as the high-spin form of [Fe(phen)₂(NCS)₂] show these compounds to have a negative principal component (V_zz) of the electric field gradient tensor. This result is consistent with previous Mössbauer and magnetic studies of [Fe(phen)₂X₂] complexes (X^- = Cl^-, N₃^-) and is interpreted in terms of an electron in d_z ² corresponding to an orbital (²A) singlet ground term.

Recommended Citation

W. M. Reiff and G. J. Long, "Nature of the Electronic Ground State in Tris(2-chlorophenanthroline)iron(II) Perchlorate and Related Complexes," Inorganic Chemistry, vol. 13, no. 9, pp. 2150 - 2153, American Chemical Society (ACS), Sep 1974.

The definitive version is available at https://doi.org/10.1021/ic50139a019

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0020-1669

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1974 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Sep 1974