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https://hdl.handle.net/2440/4672
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dc.contributor.author | Anderson, P. | - |
dc.contributor.author | Astley, T. | - |
dc.contributor.author | Hitchman, M. | - |
dc.contributor.author | Keene, F. | - |
dc.contributor.author | Moubaraki, B. | - |
dc.contributor.author | Murray, K. | - |
dc.contributor.author | Skelton, B. | - |
dc.contributor.author | Tiekink, E. | - |
dc.contributor.author | Toftlund, H. | - |
dc.contributor.author | White, A. | - |
dc.date.issued | 2000 | - |
dc.identifier.citation | Dalton Transactions: an international journal of inorganic chemistry, 2000; 2000(20):3505-3512 | - |
dc.identifier.issn | 1477-9226 | - |
dc.identifier.issn | 0300-9246 | - |
dc.identifier.uri | http://hdl.handle.net/2440/4672 | - |
dc.description.abstract | A range of six-co-ordinate bis-tripodal iron(II) chelates, [FeL₂]²⁺, has been synthesized from iron-(II) or -(III) precursors where L = tris(pyrazol-1-yl)methane (pz)₃CH, tris(pyridyl-2-yl)methane (py)₃CH, bis(pyrazol-1-yl)(pyridin-2-yl)methane (pz)₂(py)CH and tris(pyridin-2-yl)phosphine oxide (py)₃P=O. Crystal structures have been determined for three compounds and in the (pz)₃CH case for two polymorphs (α and β) which were obtained in two different laboratories from iron(III) salts using different crystallisation solvents. The electronic properties of the [FeL₂]²⁺ series have been investigated by optical spectroscopic measurements. Low-spin d⁶ behaviour is indicated. Magnetic and Mössbauer effect measurements on [Fe{(pz)₃CH}₂]²⁺ show that a gradual spin crossover to the high-spin state occurs above 270 K, though this is far from developed at 350 K. Comparisons are made with the well studied boron ligand analogue [Fe{(pz)₃BH}₂], which displays similar crossover behaviour, and with bis(tridentate) ligand complexes containing the ligand 1,4,7-triazacyclononane. | - |
dc.description.statementofresponsibility | Peter A. Anderson, Timothy Astley, Michael A. Hitchman, F. Richard Keene, Boujemaa Moubaraki, Keith S. Murray, Brian W. Skelton, Edward R. T. Tiekink, Hans Toftlund and Allan H. White | - |
dc.language.iso | en | - |
dc.publisher | Royal Soc Chemistry | - |
dc.rights | © The Royal Society of Chemistry 2000 | - |
dc.source.uri | http://dx.doi.org/10.1039/b003299i | - |
dc.title | Structures and spectra of bis-tripodal iron(II) chelates, [FeL₂]²⁺, where L = tris(pyrazol-1-yl)methane, tris(pyridin-2-yl)methane, bis(pyrazol-1-yl)(pyridin-2-yl)methane and tris(pyridin-2-yl)phosphine oxide. Magnetism and spin crossover in the (pz)₃CH case | - |
dc.title.alternative | Structures and spectra of bis-tripodal iron(II) chelates, [FeL(2)](2+), where L = tris(pyrazol-1-yl)methane, tris(pyridin-2-yl)methane, bis(pyrazol-1-yl)(pyridin-2-yl)methane and tris(pyridin-2-yl)phosphine oxide. Magnetism and spin crossover in the (pz)(3)CH case | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1039/b003299i | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Keene, F. [0000-0001-7759-0465] | - |
Appears in Collections: | Aurora harvest 6 Chemistry publications |
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