论文部分内容阅读
以N-苯基-1,2-乙二胺和5-溴水杨醛为原料,在乙醇和温和条件下合成Schiff碱,然后再与溴化锌作用构筑了新型双核锌(Ⅱ)Schiff碱配合物[Zn2Br2(C15H14BrN2O)2]。晶体结构通过X-射线衍射和元素分析进行了表征。结果表明,该晶体为无色三斜晶系,P1-空间群,晶胞参数为:a=0.922 79(17),b=1.209 6(2),c=1.628 6(3);α=75.402(3)°,β=87.464(3)°,γ=72.746(3)°;V=1.679 1(5)nm3,Z=2,Dc=1.833 g/cm3,Mr=926.94,晶体线性吸收系数μ=6.221mm-1,晶胞中电子数目为904,残差因子R=0.060 1和wR=0.115 5。晶体测试共收集7 453个独立衍射点,其中可观测衍射点数目3 425个。在八面体构型中一个Zn原子是六配位,而在四面体构型中一个Zn原子是四配位。Zn…Zn的距离为0.310 6(2)nm。在该晶体中,分子间通过N—H…Br和C—H…Br的氢键形成沿着b轴方向的弯折链。
Schiff bases were synthesized from N-phenyl-1,2-ethanediamine and 5-bromosalicylaldehyde under mild conditions of ethanol and then reacted with zinc bromide to form a novel binuclear zinc (Ⅱ) Schiff base Complex [Zn2Br2 (C15H14BrN2O) 2]. The crystal structure was characterized by X-ray diffraction and elemental analysis. The results show that the crystal is a colorless triclinic system, the P1-space group with a = 0.922 79 (17), b = 1.209 6 (2), c = 1.628 6 (3) °, β = 87.464 (3) °, γ = 72.746 (3) °; V = 1.679 1 (5) nm3, Z = 2, Dc = 1.833 g / cm3, Mr = 926.94. The linear absorption coefficient μ = 6.221 mm-1, the number of electrons in the unit cell is 904, the residual factor R = 0.060 1 and wR = 0.115 5. A total of 7 453 individual diffraction spots were collected in the crystal test, of which 3 425 diffraction spots were observed. In an octahedral configuration, a Zn atom is hexacoordinated, whereas in a tetrahedral configuration a Zn atom is tetracoordinated. Zn ... Zn is 0.310 6 (2) nm. In this crystal, a bent chain in the b-axis direction is formed between molecules through hydrogen bonds of N-H ... Br and C-H ... Br.