摘要
溴化镁与三苯基膦氧在乙醇溶液中反应生成新的可用于MgO粒子制备前驱体的双核镁化合物[Mg2(μ-OH2)2(H2O)4-(OPPh3)4]Br4。单晶X射线衍射分析表明:该双核镁配合物结构由一个均氧配位的双核镁阳离子基团与4个溴离子所组成,两对溴离子参与形成分子间的O H Br氢键,并组成了由[Mg2(μ-O)2(O)4]核所共享的高度扭曲立方烷构型,其中每个镁原子与2个μ-OH2、2个OH2和2个OPPh3中的6个氧原子组成了八面体的空间结构,Mg O(PPh3)、Mg O(OH2)和MgμO(OH2)的平均键长分别为198.3(2),206.1(2)和226.0(2)pm。
The X-ray diffraction study of the crystals deposited from the solution obtained by the reaction of magnesium dibromide with triphenylphosphine oxide in ethanol allowed the formulation of the product as [Mg2(μ-OH2)2(H2O)4(OPPh3)4]Br4.Its structure is built of a homoleptic oxygen-coordinative binuclear magnesium cation complex and four bromide anions.Two pairs of bromide anions participate in intermolecular O-H…Br bonds,forming two high-distorted cubanes which share a Mg2(μ-O)2(O)4 core.Each magnesium atom has a coordination octahedron formed by two μ-OH2,two OH2 and two OPPh3.The average Mg-O(PPh3),Mg-O(OH2) and Mg-μ-O(OH2) bond lengths are 198.3(2),206.1(2) and 226.0(2) prm,respectively.
出处
《安徽工业大学学报(自然科学版)》
CAS
2013年第4期395-398,共4页
Journal of Anhui University of Technology(Natural Science)
基金
国家自然科学基金项目(90922008)
关键词
镁配合物
氧配位
合成
晶体结构
magnesium complex
oxygen coordination
synthesis
crystal structure