2-羰基丙酸(4-吡啶甲酰基)腙与碱土金属配合物的晶体结构及热 稳定性

报道了2-羰基丙酸(4-吡啶甲酰基)腙(H~2L)与碱土金属(Ca,Mg,Sr,Ba)四种配合物的合成,结构及热稳定性。同时,用X射线单晶衍射仪测定了Mg和Ba两种配合物的晶体结构,结构分析表明两种配合物均属单斜晶系,空间群均为P2~1/c。此外,还比较讨论了各配合物不同成键方式所对应的IR特征及热稳定性变化规律。

The crystal structures and thermal stability of the complexes of 2- oxo-propionic acid (4-pyridinecarbonyl) hydrazone with alkaline earth metals

The Syntheses, structures and properties of the complexes of 2-oxo- propionic acid (4-pyridinecarbonyl)-hydrazone with alkaline earth metals are reported in this paper. The crystal structures of Mg and Ba complex were determined by x-ray single crystal diffraction analysis, the results show that two complexes are monoclinic of space group P2~1/c; the cell parameters are as follows: MgL.4H~2O, a=1.053, b=1.1308, c=1.1948nm, β =103.24ⅲ, Z=4, Vc=1.3859nm^3, Dc=1.45g/cm^3, R=0.00379. Ba(HL)~2.9h~2O, a=1.4082, b=0.7263, c=2.7798nm, β=93.14ⅲ, Z=4, Vc=2.8389nm^3, Dc=1.67g/cm^3, R=0.0404. Besides, typical IR bands of the bonding in various forms and thermal stability are discussed in comparison with each other.