(C\(_{4}\)H\(_{12}\)N\(_{2}\))[CoCl\(_{4}\)] -tetrahedrally coordinated Co\(^{2+}\) without the orbital degeneracy

We report on the synthesis, crystal structure, and magnetic properties of a previously unreported Co\(^{2+}\) \(S={3 \over 2}\) compound, (C\(_{4}\)H\(_{12}\)N\(_{2}\))[CoCl\(_{4}\)], based upon a tetrahedral crystalline environment. The \(S={3 \over 2}\) magnetic ground state of Co\(^{2+}\), measur...

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Bibliographic Details
Published in:arXiv.org 2015-12
Main Authors: Decaroli, C, Arevalo-Lopez, A M, Woodall, C H, Rodriguez, E E, Attfield, J P, Parker, S F, Stock, C
Format: Article
Language:English
Subjects:
Coupling (molecular)
Crystal structure
Diffraction
Magnetic permeability
Magnetic properties
Magnetism
Single crystals
Spin-orbit interactions
X-ray diffraction
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Summary:We report on the synthesis, crystal structure, and magnetic properties of a previously unreported Co\(^{2+}\) \(S={3 \over 2}\) compound, (C\(_{4}\)H\(_{12}\)N\(_{2}\))[CoCl\(_{4}\)], based upon a tetrahedral crystalline environment. The \(S={3 \over 2}\) magnetic ground state of Co\(^{2+}\), measured with magnetization, implies an absence of spin-orbit coupling and orbital degeneracy. This contrasts with compounds based upon an octrahedral and even known tetrahedral Co\(^{2+}\) based systems where a sizable spin-orbit coupling is measured. The compound is characterized with single crystal x-ray diffraction, magnetic susceptibility, infrared, and ultraviolet/visible spectroscopy. Magnetic susceptibility measurements find no magnetic ordering above 2 K. The results are also compared with the previously known monoclinic hydrated analogue.
ISSN:2331-8422
DOI:10.48550/arxiv.1512.07124