title: Synthesis and Characterization of Palladium(II) Complexes of meso-Substituted [14]Tribenzotriphyrin(2.1.1).
abstract: Metalation of 6,13,20,21-tetrakis-aryl-22H-[14]tribenzotriphyrin(2.1.1) (TriPs) with PdCl2 provides Pd(II)-TriP complexes in 45-56% yields. The complexes were characterized by mass spectrometry, and UV-visible absorption, magnetic circular dichroism, and (1)H NMR spectroscopy. A single crystal X-ray analysis reveals that the Pd(II)-TriPs adopts a deeply saddled conformation. The palladium(II) ion is coordinated by two pyrrole nitrogen atoms and two chloride ions to form the square-planar coordination environment. The redox properties of the Pd(II)-TriPs were studied by cyclic voltammetry. Each compound undergoes one irreversible and two reversible one-electron reductions. There is a marked red-shift of the main spectral bands, relative to those of the free-base TriP ligand, due to a marked relative stabilization of the LUMO upon coordination by PdCl2.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China.
authors.forename: Zhaoli
authors.initials: Z
authors.lastname: Xue
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China.
authors.forename: Yemei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Rhodes University Grahamstown 6140, South Africa.
authors.forename: John
authors.initials: J
authors.lastname: Mack
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China.|Department of Chemistry, University of Houston , Houston, Texas 77204-5003, United States.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Fang
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China.
authors.forename: Zhongping
authors.initials: Z
authors.lastname: Ou
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University , Zhenjiang 212013, China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Zhu
authors.affiliation: Department of Chemistry, University of Houston , Houston, Texas 77204-5003, United States.
authors.forename: Karl M
authors.initials: KM
authors.lastname: Kadish