A Diphosphine Ligand with Amide Functionality and Its Complexes with Gold(I) and Silver(I): Self-Assembly of Sheet Structures

作者：Nasser Nasser; Puddephatt Richard J^*

来源：Crystal Growth & Design, 2012, 12(8): 4275-4282.

DOI：10.1021/cg300798p

A new diphosphine ligand, N,N'-bis(2-diphenylphosphinoethyl)terephthalamide, dppeta, containing two amide groups, has been synthesized and shown to form complexes [Au2Cl2(mu-dppeta)]center dot 2Me(2)SO, 1, with gold(I) and [Ag-2(O2CCF3)(2)(mu-dppeta)], 2, and [Ag-2(OTf)(2)(OH2)(2)(mu-dppeta)], 3, with silver(I). The ligand dppeta undergoes self-association by NH center dot center dot center dot O=C hydrogen bonding in a classical way, but the complexes 1, 2, and 3 undergo self-association through a combination of hydrogen bonding and either aurophilic bonding (complex 1) or secondary coordination (complexes 2 and 3). In all cases, sheet structures are formed by self-assembly, in which the bonding interactions occur in the interior, with the outer faces containing mostly phenyl groups. In contrast, the bis(phosphine oxide) derivative, dppetaO(2), forms a ribbon polymer using the P=O groups as hydrogen bond acceptors.

• 出版日期2012-8