Bimetallic Iron-iron and Iron-zinc Complexes of the Redox-active ONO Pincer Ligand

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2017 Aug 16

PMID 28808535

Citations 7

Authors

Janice L Wong

Robert F Higgins

Indrani Bhowmick

David Xi Cao

Geza Szigethy

Joseph W Ziller

Matthew P Shores

Alan F Heyduk

Affiliations

Soon will be listed here.

Abstract

A new bimetallic platform comprising a six-coordinate Fe(ONO) unit bound to an (ONO)M (M = Fe, Zn) has been discovered ((ONO)H = bis(3,5-di--butyl-2-phenol)amine). Reaction of Fe(ONO) with either (ONO)Fe(py) or with (ONO)FeCl under reducing conditions led to the formation of the bimetallic complex Fe(ONO), which includes unique five- and six-coordinate iron centers. Similarly, the reaction of Fe(ONO) with the new synthon (ONO˙)Zn(py) led to the formation of the heterobimetallic complex FeZn(ONO), with a six-coordinate iron center and a five-coordinate zinc center. Both bimetallic complexes were characterized by single-crystal X-ray diffraction studies, solid-state magnetic measurements, and multiple spectroscopic techniques. The magnetic data for FeZn(ONO) are consistent with a ground state = 3/2 spin system, generated from a high-spin iron(ii) center that is antiferromagnetically coupled to a single (ONO˙) radical ligand. In the case of Fe(ONO), the magnetic data revealed a ground state = 7/2 spin system arising from the interactions of one high-spin iron(ii) center, one high-spin iron(iii) center, and two (ONO˙) radical ligands.

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