Joint thermolysis of the dinuclear pivalate complexes M2(μ-H2O)(μ-Piv)2(Piv)2(HPiv)4 (M = Co (1) and Ni (2), Piv- is the pivalate anion), in decane at 174 °C at the reactant ratio 1: 1 followed by treatment of the dry thermolysis product with methanol afforded crystals of a new cocrystallization product of the molecules containing the heterometallic cubane-like core M4(Co,Ni)O4. According to the X-ray diffraction data and the results of magnetic measurements, inductively coupled plasma atomic emission spectrometry (ICP-AES), and investigations of the solid-state thermal decomposition products, the isolated cocrystallization product has the general formula [Co1.6Ni2.4(μ3-OMe)4(μ2-Piv)2(pg2 -Piv)2(MeOH)4] ·4MeOH (3·4MeOH). Thermolysis of the crystals of the solvate 3·4MeOH is a destructive process accompanied by the intramolecular redox reaction. A mixture of metallic Ni and cobalt oxide (CoO) are the final solid decomposition products of 3 · 4MeOH in an argon atmosphere, whereas a mixture of the phases NiO, Co3O4, and NiCo2O4 is formed in air.
M2(μ-
H2O)(μ-Piv)2(Piv)2(HPiv)4 (M = Co (1)和 Ni (2),Piv- 为
新戊酸阴离子)的双核
新戊酸配合物在
癸烷中于 174 °C、反应物比为 1:然后用
甲醇处理干燥的热解产物,得到了含有异
金属立方体状核
M4(Co,Ni)O4的分子的新共结晶产物晶体。根据 X 射线衍射数据和磁性测量、电感耦合等离子体原子发射光谱(ICP-AES)以及固态热分解产物的研究结果,分离出的共晶体产物的通式为[Co1.6Ni2.4(μ3-OMe)4(μ2-Piv)2(pg2 -Piv)2(MeOH)4] -4MeOH(3-4MeOH)。溶解物 3-4MeOH 晶体的热分解是一个伴随着分子内氧化还原反应的破坏过程。在
氩气环境中,3-4MeOH 的最终固体分解产物是
金属
镍和
氧化钴(CoO)的混合物,而在空气中则会形成 NiO、
Co3O4 和 NiCo2O4 三相的混合物。