The synthesis and structure of adamantoid copper(II) clusters

Abstract

Three new copper(II) complexes with the general formula Cu₄X₆O(L)₄ (1, X = chloride, L = 2-amino-5-chloropyridine; 2, X = chloride, L = 2-amino-5-bromopyridine and 3, X = bromide, L= 2-aminopyridine) with an adamantane-like core structure are reported. 1 and 2 crystallize in the space group P-1, while 3 crystallizes in the space group P2₁/c. We also report comparisons between the structures of these compounds and ones found in a literature review of compounds with similar structures and organic ligands. The members of this family all exhibit antiferromagnetic interactions and the possibility of magnetic frustration due to their geometries.

KEYWORDS:

• Magnetism
• crystallography
• adamantoid
• copper(II)

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

Financial support from the NSF (IMR-0314773) toward the purchase of the SQUID magnetometer, SEQENS toward the purchase of the powder X-ray diffractometer and The Kresge Foundation toward the purchase of both is gratefully acknowledged. BAM is grateful for a SEQENS Summer Undergraduate Research Fellowship. In addition, the authors are grateful to the NSF for support of the purchase and construction of a helium recycling system (DMR-1905950).