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Heteroleptic, two-coordinate [M(NHC){N(SiMe3)2}] (M = Co, Fe) complexes: synthesis, reactivity and magnetism rationalized by an unexpected metal oxidation state.
- Source :
-
Dalton Transactions: An International Journal of Inorganic Chemistry . 1/28/2017, Vol. 46 Issue 4, p1163-1171. 9p. - Publication Year :
- 2017
-
Abstract
- The linear, two-coordinate and isostructural heteroleptic [M(IPr){N(SiMe3)2}] (IPr = 1,3-bis(diisopropylphenyl)-imidazol-2-ylidene), formally MI complexes (M = Co, 3; Fe, 4) were obtained by the reduction of [M(IPr)Cl{N(SiMe3)2}] with KC8, or [Co(IPr){N(SiMe3)2}2] with mes*PH2, mes* = 2,4,6-tBu3C6H2. The magnetism of 3 and 4 implies CoII and FeII centres coupled to one ligand-delocalized electron, in line with XPS and XANES data; the ac susceptibility of 4 detected a pronounced frequency dependence due to slow magnetization relaxation. Reduction of [Fe(IPr)Cl{N(SiMe3)2}] with excess KC8 in toluene gave the heteronuclear ‘inverse-sandwich’ Fe–K complex 7, featuring η6-toluene sandwiched between one Fe0 and one K+ centre. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HETEROLEPTIC compounds
*MAGNETISM
*METALLIC oxides
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 46
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 120933221
- Full Text :
- https://doi.org/10.1039/c6dt03565e