@article{Stati2026, 
author = {Dumitru Stati and Jan van Leusen and Victor Ch. Kravtsov and Yurii Chumakov and Paul Kögerler and Svetlana G. Baca},
title = {A CoII/III oxo-carboxylate cluster featuring a Lindqvist core},
year = {2026},
journal = {Polyoxometalates},
keywords = {cluster, cobalt, magnetism, Lindqvist structure},
url = {https://www.sciopen.com/article/10.26599/POM.2026.9140163},
doi = {10.26599/POM.2026.9140163},
abstract = {A nonanuclear mixed-valent coordination cluster, isolated as [CoIII3CoII6(µ6-O)(piv)7(thmp)4(MeCN)2(H2O)]·4(MeCN) (1), forms in a one-pot reaction of cobalt(II) pivalate and 1,1,1-tris(hydroxymethyl)propane (H3thmp) in acetonitrile solution. Single-crystal X-ray diffraction analysis reveals an unusual {Co6O19} Lindqvist-type core capped by three Co sites. High-resolution ESI-mass spectrometry studies confirm the integrity of this core structure in solution, exhibiting a series of peaks corresponding to the intact cluster species. Magnetic studies indicate that the magnetic behavior in 1 is dominated by six high-spin Co(II) ions in octahedral ligand fields exhibiting weak intra-cluster antiferromagnetic exchange coupling. }
}