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作 者:熊航行[1]
出 处:《无机化学学报》2016年第9期1596-1602,共7页Chinese Journal of Inorganic Chemistry
摘 要:合成了2个新的单核双氧基钼(Ⅵ)配合物,其分子式通式为[Mo O2L(Me OH)],其中L1和L2分别是N′-(3-溴-2-羟基苯亚甲基)-3,5-二甲氧基苯甲酰肼和N′-(5-溴-2-羟基苯亚甲基)异烟肼的二价阴离子,通过理化手段、光谱方法以及单晶X射线衍射表征了它们的结构。配合物1以单斜晶系P21/n空间群结晶,其晶体学参数a=0.848 98(3)nm,b=2.275 4(1)nm,c=1.069 82(5)nm,β=109.108(1)°,V=1.952 8(1)nm3,Z=4,R1=0.036 7,w R2=0.084 0,S=1.027。配合物2以三斜晶系P1空间群结晶,其晶体学参数a=0.655 05(9)nm,b=1.076 63(7)nm,c=1.303 3(1)nm,α=67.383(2)°,β=84.264(1)°,γ=76.195(2)°,V=0.823 9(1)nm3,Z=2,R1=0.071 3,w R2=0.151 0,S=1.004。X射线分析表明2个配合物中的Mo原子都采取八面体配位构型,配位原子分别来自酰腙配体的NO2给体基团和甲醇氧原子。催化实验表明2个配合物都是有效的烯烃氧化催化剂。Two new mononuclear dioxomolybdenum(Ⅵ) complexes with general formula [Mo O2L(Me OH)],where L1 and L2are the dianionic form of N′-(3-bromo-2-hydroxybenzylidene)-3,5-dimethoxybenzohydrazide and N′-(5-bromo-2-hydroxybenzylidene)isonicotinohydrazide,respectively,were prepared and structurally characterized by physico-chemical,spectroscopic methods and single crystal X-ray determination.The crystal of complex 1crystallizes in monoclinic space group P21/n,with a=0.848 98(3) nm,b=2.275 4(1) nm,c=1.069 82(5) nm,β=109.108(1)°,V=1.952 8(1) nm3,Z=4,R1=0.036 7,w R2=0.084 0,S=1.027.The crystal of complex 2 crystallizes in triclinic space group P1,with a=0.655 05(9) nm,b=1.076 63(7) nm,c=1.303 3(1) nm,α=67.383(2)°,β=84.264(1)°,γ=76.195(2)°,V=0.823 9(1) nm3,Z=2,R1=0.071 3,w R2=0.151 0,S=1.004.X-ray analysis indicates that the Mo atom in each complex is in an octahedral coordination environment,constructed by two oxo groups and NO2 donor set of the hydrazone ligand,as well as a methanol O atom.The catalytic property of the complexes indicates that they are efficient catalysts for the oxidation of olefins.
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