Pivalates with the MII4O4 cubane core (M = Co,Ni): synthesis,structure, magnetic properties,and solid-state thermolysis |
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| Authors: | I. G. Fomina Zh. V. Dobrokhotova G. G. Aleksandrov O. Yu. Proshenkina M. L. Kovba A. S. Bogomyakov V. N. Ikorskii V. M. Novotortsev I. L. Eremenko |
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| Affiliation: | (1) International Tomography Center, Russian Academy of Sciences, 630090 Novosibirsk, Russia;(2) Novosibirsk State University, 630090 Novosibirsk, Russia; |
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| Abstract: | Methods were developed for the controlled thermal synthesis of high-spin cubane-like pivalates {MII 4(μ3−OR)4} (M = Co or Ni; R = H or Me) starting from mono-and polynuclear complexes. The solid-state thermal decomposition of the known pivalate clusters [MII 4(μ3−OMe)4−(μ2−OOCBut)2(η2−OOCBut)2(MeOH)4] and the new clusters [M4II(μ3)−OH4(η1−OOCBut)3−(μ−(NH2)2C6H2Me2)3(η1−(NH2)2C6H2Me2)3]+(OOCBut)− (M = Co or Ni) was studied by differential scanning calorimetry and thermogravimetry. The thermolysis of cubane-like CoII and NiII pivalates is a destructive process. The phase composition of the decomposition products is determined by the nature of coordinated ligands and the structural features of the metal core. |
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