Synthesis, crystal structure, and properties of a μ₃-oxo-trichromium(III) propionate cluster with pyrazole

Abstract

A new μ₃-oxo trinuclear chromium(III) propionate cluster, [Cr₃(μ₃-O)(O₂CCH₂CH₃)₆(pyr)₃]NO₃·0.25(H₂O) (1), has been synthesized by reaction of a μ₃-oxo trinuclear chromium(III) propionate precursor [Cr₃(μ₃-O)(O₂CCH₂CH₃)₆(H₂O)₃]NO₃ with a pyrazol ligand (pyr) and characterized by IR spectroscopy, single-crystal X-ray structure determination, and thermal analysis. Magnetic susceptibility and magnetization studies revealed antiferromagnetic exchange interactions within the trinuclear Cr(III) cluster (J = −11.9 cm⁻¹) and determined the electronic ground state (S = ½) of the compound.

Keywords:

• Chromium(III)
• cluster compound
• carboxylate ligand
• magnetic properties

Funding

This study was supported by the Swiss National Science Foundation SCOPES [grant number IZ73Z0_152404/1].

Disclosure statement

No potential conflict of interest was reported by the authors.