The Cyclic “Silver-Diphos” Motif [Ag<sub>2</sub>(μ-diphosphine)<sub>2</sub>]<sup>2+</sup> as a Synthon for Building up Larger Structures
作者:Philip W. Miller、Mark Nieuwenhuyzen、Jonathan P. H. Charmant、Stuart L. James
DOI:10.1021/ic800664f
日期:2008.9.15
The dinuclear, cyclic structural motif [Ag2(diphosphine)2](2+), here termed the "silver-diphos" motif, previously observed in many diphosphine-silver complexes, has been investigated as a synthon for building up larger structures such as coordination cages and polymers. A series of ligands containing one to four meta-substituted diphosphine groups, attached via a central core, has been synthesized
已经研究了双核环状结构基序[Ag2(diphosphine)2](2+),以前在许多二膦-银配合物中观察到,称为“银-二磷”基序,已被用作合成较大结构的合成子,例如配位笼和聚合物。通过与KPPh2反应,由相应的氟代芳烃合成了一系列通过中心核连接的,含有一个至四个间位取代的二膦基的配体。与银盐反应后,目标合成子被间位取代的二膦1,3-双(二苯基膦基)苯(L1),2,6-双(二苯基膦基)苄腈(L2)和3,5-双(二苯基膦基)所采用)苯甲酰胺(L3),每种溶液中的单一种类与预期的二聚配合物[Ag2L2(阴离子)2]一致。[Ag2(L1)2(OTf)2]和[Ag2(L2)2(SbF6)2]的X射线晶体结构确定了固态的二氟银基元的采用。酰胺官能化的二膦L3经由酰胺基团在固态形成氢键合的链结构。当四膦Ph2Sn 3,5-双(二苯基膦基)苯} 2(L4)与银(I)反应时,会形成基于两个银-二膦基合成子的离散盒状笼[Ag4(L4)2]