Towards direct correlations between spin-crossover and structural features in iron(II) complexes
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MARCHIVIE, Mathieu | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GUIONNEAU, Philippe | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LÉTARD, Jean-François | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHASSEAU, Daniel | |
| dc.date.issued | 2003 | |
| dc.identifier.issn | 0108-7681 | |
| dc.description.abstractEn | The [Fe(PM-BiA)2(NCS)2] complex, where PM is N-2-pyridylmethylene and BiA is 4-aminobiphenyl, crystallizes in two polymorphs. The two phases, denoted (I) and (II), undergo a spin-crossover when the sample is cooled and present distinct spin-transition features as (I) shows a very abrupt spin transition, while (II) exhibits a gradual transition. The two forms of the complex are used to investigate the correlations that exist between the spin-transition features and structural features. This article presents the crystal structures of polymorph (II) at room temperature (high spin) and at 120 K (low spin), including a comparison with those of polymorph (I). This study reveals that the packing, in a first approximation, is similar in both forms. In order to look at the crystal structures in more detail, a new angular parameter, denoted [bold theta]NCS, as well as a particular type of intermolecular hydrogen-bond interaction, which involves the S atoms of the NCS ligands, are investigated. Interestingly, this angle and this intermolecular interaction can be directly connected to the cooperativity of the spin transition. Such a result is extended to all the SCO iron(II) complexes belonging to the same family of the general formula [Fe(PM-L)2(NCS)2]. | |
| dc.language.iso | en | |
| dc.publisher | International Union of Crystallography | |
| dc.subject.en | Spin-crossover | |
| dc.subject.en | Structural features | |
| dc.subject.en | Cooperativity | |
| dc.subject.en | Polymorphism | |
| dc.title.en | Towards direct correlations between spin-crossover and structural features in iron(II) complexes | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1107/S0108768103011200 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Acta Crystallographica Section B : Structural Science [1968-2013] | |
| bordeaux.page | 479-486 | |
| bordeaux.volume | 59 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00182715 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00182715v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Acta%20Crystallographica%20Section%20B%20:%20Structural%20Science%20%5B1968-2013%5D&rft.date=2003&rft.volume=59&rft.spage=479-486&rft.epage=479-486&rft.eissn=0108-7681&rft.issn=0108-7681&rft.au=MARCHIVIE,%20Mathieu&GUIONNEAU,%20Philippe&L%C3%89TARD,%20Jean-Fran%C3%A7ois&CHASSEAU,%20Daniel&rft.genre=article |
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