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  A linear cobalt(II) complex with maximal orbital angular momentum from a non-Aufbau ground state

Bunting, P. C., Atanasov, M., Damgaard-Møller, E., Perfetti, M., Crassee, I., Orlita, M., et al. (2018). A linear cobalt(II) complex with maximal orbital angular momentum from a non-Aufbau ground state. Science, 362(6421): eaat7319. doi:10.1126/science.aat7319.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-BF41-E Version Permalink: https://hdl.handle.net/21.11116/0000-0002-BF42-D
Genre: Journal Article

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 Creators:
Bunting, Philip C.1, Author
Atanasov, Mihail2, 3, Author           
Damgaard-Møller, Emil4, Author
Perfetti, Mauro5, Author
Crassee, Iris6, Author
Orlita, Milan6, 7, Author
Overgaard, Jacob4, Author
van Slageren, Joris5, Author
Neese, Frank8, Author           
Long, Jeffrey R.1, 9, 10, Author
Affiliations:
1Department of Chemistry, University of California, Berkeley, CA 94720, USA, ou_persistent22              
2Research Group Atanasov, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_2541704              
3Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Academy Georgi Bontchev, Sofia 1113, Bulgaria, ou_persistent22              
4Department of Chemistry and Centre for Materials Crystallography, Aarhus University, DK-8000 Aarhus C, Denmark, ou_persistent22              
5Institut für Physikalische Chemie and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany, ou_persistent22              
6Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA-EMFL, 25 rue des Martyrs, 38042 Grenoble, France, ou_persistent22              
7Institute of Physics, Charles University, Ke Karlovu 5, 12116 Praha 2, Czech Republic, ou_persistent22              
8Research Department Neese, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_2541710              
9Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA, ou_persistent22              
10Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA, ou_persistent22              

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 Abstract: Orbital angular momentum is a prerequisite for magnetic anisotropy, although in transition metal complexes it is typically quenched by the ligand field. Here, by reducing the basicity of the carbon donor atoms in a pair of alkyl ligands, we synthesize a cobalt(II) dialkyl complex, Co(C(SiMe2ONaphthyl)3)2 (where Me is methyl and Naph is a naphthyl group), wherein the ligand field is sufficiently weak that interelectron repulsion and spin-orbit coupling play a dominant role in determining the electronic ground state. Assignment of a non-Aufbau (dx2–y2, dxy)3(dxz, dyz)3(dz2)1 electron configuration is supported by dc magnetic susceptibility data, experimental charge density maps, and ab initio calculations. Variable-field far-infrared spectroscopy and ac magnetic susceptibility measurements further reveal slow magnetic relaxation via a 450-wave number magnetic excited state.

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Language(s): eng - English
 Dates: 2018-03-282018-11-012018-11-152018-12-21
 Publication Status: Issued
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1126/science.aat7319
 Degree: -

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Title: Science
  Other : Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 362 (6421) Sequence Number: eaat7319 Start / End Page: - Identifier: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1