Mono- and Dinuclear Binding Modes of the 2,5-Bis(α-pyridyl)pyrrolate Ligand in Platinum(II) Complexes
作者:Drew C. Newman、Michael R. Gau、Patrick J. Carroll、Karen I. Goldberg
DOI:10.1021/acs.organomet.1c00152
日期:2021.6.28
A series of platinum(II) complexes with the 2,5-bis(α-pyridyl)pyrrolate (PDP) ligand were synthesized. The ligand (X) trans to the central pyrrole nitrogen of PDP was found to play a key role in whether tridentate monomeric or bidentate clamshell dimer complexes were formed. When X = CH3 or C6H5, strong σ-donor ligands, only dimeric clamshell structures were observed. In contrast, when X = Cl or I
合成了一系列具有 2,5-双(α-吡啶基)吡咯酸酯 (PDP) 配体的铂 (II) 配合物。发现与 PDP 的中心吡咯氮反式的配体 (X) 在三齿单体或双齿蛤壳二聚体复合物的形成中起关键作用。当 X = CH 3或 C 6 H 5 时,强σ-供体配体,仅观察到二聚蛤壳结构。相反,当 X = Cl 或 I,具有 π 供体特性的配体时,可以制备二聚体和单体复合物。配体框架支持与 π 供体 X 型配体形成单体复合物的能力归因于 PDP 配体在单体构象中充当有效 π 酸的能力。