High- and Low-spin Complexes with Similar Ligands. Iron(II) Complexes of Terpyridyl and Its Derivatives
Abstract
Two new ligands, 2,6-di(2′-quinolyl)pyridine (dqp) and 2-acetyl-6-(2′-quinolyl)pyridine (aqp), have been prepared by the reaction of pyridine-2,6-diacetyl and o-aminobenzaldehyde. dqp is a benzo-disubstituted analog of 2,2′,2′-terpyridyl (terpy), but its bis-chelated ferrous complex is high spin, whereas that of terpy is low spin. This observation and the electronic spectra indicate that dqp is a much weaker ligand (Δ ∼ 12,000 cm -1) than terpy. These results are interpreted in terms of an increase in the average metal-ligand bond distance as a result of the steric effect of benzo substitution. The bis-chelated ferrous complex of aqp is high spin, as expected.
Recommended Citation
C. M. Harris et al., "High- and Low-spin Complexes with Similar Ligands. Iron(II) Complexes of Terpyridyl and Its Derivatives," Inorganic Chemistry, American Chemical Society (ACS), Jan 1969.
The definitive version is available at https://doi.org/10.1021/ic50071a024
Department(s)
Chemistry
International Standard Serial Number (ISSN)
0020-1669
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1969 American Chemical Society (ACS), All rights reserved.
Publication Date
01 Jan 1969
