Co-ordination chemistry of 2-phenyl-6-(2-thienyl)pyridine and 2,6-bis(2-thienyl)pyridine; new ambidentate ligands
作者:Edwin C. Constable、Roland P. G. Henney、Derek A. Tocher
DOI:10.1039/dt9920002467
日期:——
The new ligands 2-phenyl-6-(2-thienyl)pyridine (H2pthpy) and 2,6-bis(2-thienyl)pyridine (H2bthpy) exhibit a variety of reactivities with d8 transition-metal complexes. Reaction of H2bthpy with platinum(II) gives complexes in which the ligand adopts Hbthpy-C,N and bthpy-CNC bonding modes, whereas gold(III) converts the ligand into the dimer 5,5′-bis[6-(2-thienyl)-2-pyridyl]-2,2′-bithiophene. Palladium(II)
新的配体2-苯基-6-(2-噻吩基)吡啶(H 2 pthpy)和2,6-双(2-噻吩基)吡啶(H 2 bthpy)具有d 8过渡金属配合物的多种反应活性。H 2 bthpy与铂(II)的反应生成了配合物,其中配体采用Hbthpy- C,N和bthpy- CNC键合模式,而金(III)将配体转化为二聚体5,5'-bis [6-( 2-噻吩基)-2-吡啶基] -2,2'-联噻吩。钯(II)给出了环金属化配合物和二聚配体的混合物。相反,H 2 pthpy与铂(II)得到金属化的络合物,其中金属化的位点是苯基而不是噻吩基环。H 2 pthpy与金(III)的反应可干净地转化为二聚物5,5'-双(6-苯基-2-吡啶基)-2,2'-联噻吩和氯化衍生物2-(5-氯-2-噻吩基)-6-苯基吡啶。再次用钯(II)获得金属化产物和配体反应产物的混合物。