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Experimental and Computational Study of Unique Tetranuclear µ 3 ‐Chloride and µ‐Phenoxo/Chloro‐Bridged Defective Dicubane Cobalt(II) Clusters
Author(s) -
Hänninen Mikko. M.,
Välivaara Juha,
Cano Joan,
Sillanpää Reijo,
Colacio Enrique
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201501190
Subject(s) - chemistry , cobalt , crystallography , intramolecular force , cluster (spacecraft) , chloride , denticity , crystal structure , inorganic chemistry , stereochemistry , organic chemistry , computer science , programming language
Two tetranuclear Co II clusters [Co 4 (L) 2 (µ 3 ‐Cl) 2 Cl 2 ] have been prepared by using multidentate diaminobisphenolate ligands. The solid‐state structures of the complexes were determined by single‐crystal X‐ray diffraction. The cores of the cluster compounds can be defined as a two‐vertex‐deficient dicubane geometry (pseudo‐dicubane). In the central unit, the cobalt(II) cations are linked through phenoxide oxygen (outer bridges) and chloride anions (inner bridges), previously unprecedented in this type of cobalt cluster. The magnetic properties were studied by both experimental and computational methods. By using a combination of techniques, we were able to determine the nature and strength of the intramolecular magnetic exchange coupling mediated by the different bridging fragments between the crystallographically different cobalt(II) cations.