Seven-coordinate iron(II) complexes of sulfur-based N3S2-macrocyclic ligands: synthesis, properties, and crystal structure
Shaban SAEFY, Ibrahim MM, Heinemann FW, van Eldik R (2012)
Publication Status: Published
Publication Type: Journal article
Publication year: 2012
Journal
Publisher: TAYLOR & FRANCIS LTD
Book Volume: 65
Pages Range: 934-944
Journal Issue: 6
DOI: 10.1080/00958972.2012.663083
Abstract
The reaction of pyridine-2,6-dicarbaldehyde or 2,6-diacetylpyridine with 1,2-bis(o-aminophenylthio) ethane (1) in acetonitrile in the presence of stoichiometric amounts of iron(II) perchlorate gave the complexes [(pyN(3)S(2))Fe-II(ClO4)(2)] (4) and [(pyN(3)Me(2)S(2)) Fe-II(ClO4)(2)] (5) of the 15-membered N3S2 macrocyclic ligands, pyN(3)S(2) = {6,7-dihydro-15,19-nitrilobenzo( e,p)(1,4,7,15)dithiadiazacyclo-heptadecine-N, N', N '', S, S'} and pyN(3)Me(2)S(2) = {6,7-dihydro- 16,18-dimethyl-15,19-nitrilobenzo(e,p)(1,4,7,15)dithiadiazacyclo-heptadecine-N, N', N '', S, S'}, respectively. Physical measurements led to the conclusion that these complexes contained seven-coordinate iron(II) and a single-crystal X-ray examination of 4 confirmed this. Coordination of the Fe(II) center in 4 is best described as distorted pentagonal-bipyramidal with the three nitrogen atoms and two sulfur donors of the macrocycle defining the pentagonal plane and the perchlorate ions occupying axial positions. Room temperature (293 K) magnetic moments of 4 and 5 (mu(eff) = 4.9 and 4.7 B.M., respectively) are close to the value predicted for high-spin d(6) systems.
Authors with CRIS profile
Frank Wilhelm Heinemann
Lehrstuhl für Anorganische und Allgemeine Chemie
Rudi van Eldik
Naturwissenschaftliche Fakultät
Involved external institutions
Egypt (EG)How to cite
APA:
Shaban, S.A.E.F.Y., Ibrahim, M.M., Heinemann, F.W., & van Eldik, R. (2012). Seven-coordinate iron(II) complexes of sulfur-based N3S2-macrocyclic ligands: synthesis, properties, and crystal structure. Journal of Coordination Chemistry, 65(6), 934-944. https://doi.org/10.1080/00958972.2012.663083
MLA:
Shaban, Shaban Abd El Fattah Youssef, et al. "Seven-coordinate iron(II) complexes of sulfur-based N3S2-macrocyclic ligands: synthesis, properties, and crystal structure." Journal of Coordination Chemistry 65.6 (2012): 934-944.
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