Dimethyl[4-methyl-2,6-bis(phenyliminomethyl)phenolato-κ2N,O]gallium(III)

Gu, Weijin; Li, Yi‐Zhi; Pan, Yi; Liu, San-Hui

doi:10.1107/s1600536805005702

Cited by 2 publications

(1 citation statement)

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“…The ligand Hbpp should favor the assembly of dinuclear moieties with vacant coordination sites, which should therefore be prone to bind to other exogenous donors, eventually facilitating the growth of the system into higher nuclearity species. Surprisingly, only mononuclear complexes have been reported with this ligand or close derivatives, [16,17] even though this principle has been proven with related Schiff bases in the construction of large clusters. [18] This potential is exploited here, together with the capacity of the carbonate ligand to adopt a large variety of coordination modes, [19][20][21][22][23][24] to access the rare topology featured by complex 1.…”

Section: Introductionmentioning

confidence: 97%

Double‐CO₃²⁻ Centered [Co^II₅] Wheel and Modeling of Its Magnetic Properties

Sarkar

Aromı́

Cano

et al. 2010

Chemistry A European J

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A high-spin Co(II) cluster with a rare pentagonal molecular structure and formula [Co(5)(CO(3))(2)(bpp)(5)]ClO(4) (1; Hbpp is 2,6-bis(phenyliminomethyl)-4-methylphenolate) has been synthesized and characterized by single-crystal X-ray diffraction. This topology arises from fusing five [Co(2)(bpp)] moieties in a cyclic manner around two CO(3)(2-) central ligands, resulting in propeller-like configuration. The irregular coordination of the carbonate ions to the metal centers results in a combination of coordination numbers (CNs) of the Co(II) ions of five and six. The bulk magnetization of this complicated magnetically exchanged system has been modeled successfully by employing a matrix diagonalization technique. For this, the combination of S=3/2 ions (CN=5) with ions exhibiting strong spin-orbit coupling (CN=6) has been considered and a perturbative approach to handle the data in the whole studied range of temperatures (2-300 K) yielding parameters of g and D (for the five-coordinate Co(II) ions), of A, κ, λ, and Δ (for the metals with spin-orbit coupling) and of the exchange constants J. The agreement with results from DFT calculations, also presented here, is remarkable.

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