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A rigid trans-spanning dinitrile ligand

机译:刚性跨跨二腈配体

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摘要

A rigid dinitrile ligand was synthesized from two xanthene units condensed to a naphthalene-1,4,5,8- diimide spacer. The rigidity and C shape of the ligand gave exclusively trans complexes with Pd(II), Ag(I), and Au(I). Evidence for complexation, coordination geometry, and stoi- chiometry was provided by a combination of ~1H NMR, ~19F NMR, and IR spectroscopy. The AuBF_4 and PdCl_2 complexes were shown to have a 1:1 (metal-to-ligand) stoichiometry and the AgBF_4 complex was shown to have a 1:2 stoichiometry in solution. The preorganization of the dinitrile ligand resulted in complexes much more stable than their monodentate counterparts.
机译:刚性二腈配体由两个two吨单元缩合成萘-1,4,5,8-二酰亚胺间隔基合成。配体的刚性和C形仅与Pd(II),Ag(I)和Au(I)形成反式配合物。 〜1 H NMR,〜19 F NMR和IR光谱的结合提供了络合,配位几何和化学计量的证据。 AuBF_4和PdCl_2配合物的化学计量比为1:1,AgBF_4配合物的溶液化学计量比为1:2。二腈配体的预组织导致复合物比其单齿对应物稳定得多。

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