Jump to main content
Jump to site search


Heteroleptic iron(ii) complexes with naphthoquinone-type ligands

Author affiliations

Abstract

Heteroleptic iron complexes with a naphthoquinone-type ligand, 2-(pyridin-2-yl)-1H-naphtho[2,3-d]imidazole-4,9-dione (HL), were synthesized, and their structures and magnetic properties were investigated. Two spin-crossover complexes, [Fe(L)2(L1)] (1, L1 = ethylenediamine) and [Fe(L)2(L2)] (2, L2 = cyclohexanediamine) were structurally characterized at 100 K and 270 K, and their gradual spin crossover behavior observed by magnetic susceptibility measurements and confirmed by Mössbauer spectroscopic analyses. Two homologous iron(II) complexes, [Fe(L)2(L3c)] (3, L3c = diimino benzoquinone) and [Fe(L)2(L4c)] (4, L4c = iminosuccinonitrile), were found to exist in the low-spin state in the range of 10–300 K. In contrast, the corresponding complex with two water ligands, [Fe(L)2(H2O)2] (5), and the tris-chelate complex with protonated ligands (HL), [Fe(HL)3](BF4)2 (6), were found to be high-spin.

Graphical abstract: Heteroleptic iron(ii) complexes with naphthoquinone-type ligands

Back to tab navigation

Supplementary files

Article information


Submitted
07 Oct 2019
Accepted
27 Dec 2019
First published
09 Jan 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

Heteroleptic iron(II) complexes with naphthoquinone-type ligands

T. Shiga, R. Kumamaru, G. N. Newton and H. Oshio, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT03946E

Social activity

Search articles by author

Spotlight

Advertisements