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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis and structural characterisation of heavy alkaline earth N,N'-bis(aryl)formamidinate complexes
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Synthesis and structural characterisation of heavy alkaline earth N,N'-bis(aryl)formamidinate complexes

机译:重碱土金属N,N'-双(芳基)甲ami酸盐配合物的合成与结构表征

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Treatment of calcium or strontium with 2.0 equivalents of N,N'-bis(o-methylphenyl)formamidine(o-TolFormH),N,N'-bis(2,6-dimethylphenyl)forrnamidine(XylFormH)or N,N'-bis(o-phenylphenyl)-formamidine(o-PhPhFormH)in the presence of 1.0 equivalent of Hg(C_6F_5)_2 in tetrahydrofuran(thf)affords the bis(formamidinate)complexes[Ca(o-TolForm)_2(thf)_2](1),[Ca(XylForm)_2(thf)_2](2),[Ca(o-PhPhForm)_2(thf)_2]·thf(3),[Sr(o-TolForm)_2(thf)_3](4),[Sr(XylForrn)_2(thf)_3]·3thf(5)and[Sr(o-PhPhForm)_2(thf)_3]·2thf(6).Analogous reactions with barium were generally unsatisfactory but[Ba(o-PhPhForm)_2(thf)_3]·2thf(7)was successfully prepared.Compounds 1-7 have been characterised by various spectroscopic methods(~1H,~(13)C{~1H} NMR and IR),elemental analyses and,for 1,2 and 4-6,X-ray crystallography.The calcium complexes are monomeric and six-coordinate with either transoid octahedral or trigonal prismatic geometry,whilst the larger radius of strontium accommodates an additional thf solvent donor to give seven-coordinate structures with two types of coordination polyhedra.
机译:用2.0当量的N,N'-双(邻-甲基苯基)甲idine(o-TolFormH),N,N'-双(2,6-二甲基苯基)甲酸(XylFormH)或N,N'-处理钙或锶在四氢呋喃(thf)中存在1.0当量的Hg(C_6F_5)_2的情况下,双(邻苯基苯基)-甲((o-PhPhFormH)提供双(甲酰胺基)络合物[Ca(o-TolForm)_2(thf)_2] (1),[Ca(XylForm)_2(thf)_2](2),[Ca(o-PhPhForm)_2(thf)_2]·thf(3),[Sr(o-TolForm)_2(thf)_3 ](4),[Sr(XylForrn)_2(thf)_3]·3thf(5)和[Sr(o-PhPhForm)_2(thf)_3]·2thf(6)。与钡的类似反应通常不能令人满意,但是[已成功制备了Ba(o-PhPhForm)_2(thf)_3]·2thf(7)。已通过多种光谱方法(〜1H,〜(13)C {〜1H} NMR和IR)对化合物1-7进行了表征。元素分析以及1,2和4-6的X射线晶体学分析。钙络合物是单体的且六坐标的,具有Transoid八面体或三角棱柱几何形状,而较大的锶半径可容纳额外的thf溶剂供体塞夫具有两种类型的配位多面体的n配位结构。

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