A Tetragonal Core with Asymmetric Iron Environments Supported Solely by Bis(μ-OH){μ-(O–H···O)} Bridging and Terminal Pyridine Amide (N, O) Coordination: A New Member of the Tetrairon(III) Family
✍ Scribed by Akhilesh K. Singh; Wilson Jacob; Athanassios K. Boudalis; Jean-Pierre Tuchagues; Rabindranath Mukherjee
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 492 KB
- Volume
- 2008
- Category
- Article
- ISSN
- 1434-1948
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Room‐temperature aerobic reaction of [Fe(MeCN)~4~][ClO~4~]~2~ with 1,3‐bis(2‐pyridinecarboxamido)propane (H~2~bpp) yields the tetrairon(III) complex [Fe~4~(H~2~bpp)~4~(μ‐OH)~2~(μ‐OHO)][ClO~4~]~7~·2H~2~O·__x__MeCN (1·__x__MeCN, 0 ≤ x ≤ 3). Crystal structure determination reveals that 1·3MeCN is a new member of the tetrairon(III) family, bridged solely by two hydroxido ligands and a localized {O–H···O}^3–^ bridging unit. The properties of the “tetragonal” core [Fe~4~(μ‐OH)~2~{μ‐(O–H···O)}]^7+^ have been investigated by variable‐temperature magnetic and Mössbauer spectroscopic measurements. Successful modeling of the data has revealed asymmetric iron environments and three types of magnetic exchange interactions [through μ‐OH and μ‐O/μ‐OH of μ‐(O–H···O) bridges]. This tetragonal core is a valuable addition to the tetrairon(III) cluster family from inorganic and bioinorganic perspectives.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)