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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Boron termplated catechol phosphines as bidentate ligands in silver complexes
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Boron termplated catechol phosphines as bidentate ligands in silver complexes

机译：硼镀邻苯二酚膦作为银络合物中的双齿配体

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Reaction of 3-[(diphenylphosphinyl)methyl]benzene-1,2-diol(1)and 4-[(diphenylphosphinyl)-methyl]benzene-1,2-diol(2)with AgOTf or B(OH)3 produced the bis-phosphine complexes 4,5,or the borates 6,7,respectively.All products were characterised by analytical and spectroscopic data and single-crystal X-ray diffraction studies.The anionic assembly 6 was shown to act as a template-based chelate ligand toward Ag~+by forming a neutral complex 8 of composition[(6)Ag]with AgOTf.Spectroscopic and single-crystal X-ray diffraction studies revealed the presence of a kinetically very stable and conformationally rigid chelate that is best described as a bis-phosphine silver complex with a distinctly non-linear P-Ag-P array and two further secondary Ag-O interactions.Reaction of 7 with AgOTf proceeded in a 2:2 molar ratio to give a dimeric product 9 which was,on the basis of spectroscopic data,formulated as a macrocycle of composition[(7)2Ag2].The different molecular sizes of 8 and 9 was underlined by PGSE NMR measurements which gave further evidence for the formation of solvent adducts between the chelate complex 8 and DMF.Analysis of the ~1H,~(109)Ag HMQC NMR spectra of 8 provided evidence for a dependence of the ~3J_(Ag,H)coupling on torsional angles which resembles a Karplus-type relationship.
机译：3-[（二苯基膦基）甲基]苯-1,2-二醇（1）和4-[（二苯基膦基）-甲基]苯-1,2-二醇（2）与AgOTf或B（OH）3的反应双膦配合物4,5或硼酸酯6,7。所有产品均通过分析和光谱数据以及单晶X射线衍射研究表征。阴离子组件6被证明是基于模板的螯合物通过与AgOTf形成成分[（6）Ag]的中性配合物8，使配体向Ag〜+迁移。光谱和单晶X射线衍射研究表明，存在动力学上非常稳定且构象刚性的螯合物，最好将其描述为双膦银配合物，具有明显的非线性P-Ag-P阵列和另外两个次级Ag-O相互作用。7与AgOTf的反应以2：2的摩尔比进行，得到二聚产物9，在光谱数据的基础，由组成[（7）2Ag2]的大环组成。P强调了8和9的不同分子大小GSE NMR测量为螯合物8与DMF之间形成了溶剂加合物提供了进一步的证据.8的〜1H，〜（109）Ag HMQC NMR光谱分析为〜3J_（Ag，H ）类似于Karplus型关系的扭转角耦合。

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