Metallosupramolecular zinc and cadmium complexes of Bis[4-(2-pyridyl)pyrimidinylthiomethyl]benzenes
摘要:
Reactions of L-1 and L-2 (L-1 = 1,4-bis[4-(2-pyridyl)pyrimidinylthiomethyl] benzene; L-2 = 1,3-bis[4-(2-pyridyl)pyrimidinylthiomethyl]benzene) with Cdl(2), Znl(2) and Cd(NO3)(2) led to the formation of two discrete bimetallic complexes and one single-handed helix, respectively. Conformation changes of ligands after interactions with metal salts were found due to the positional isomerism of xylyl groups and the effect of anions. (C) 2008 Elsevier B.V. All rights reserved.
Metallosupramolecular zinc and cadmium complexes of Bis[4-(2-pyridyl)pyrimidinylthiomethyl]benzenes
摘要:
Reactions of L-1 and L-2 (L-1 = 1,4-bis[4-(2-pyridyl)pyrimidinylthiomethyl] benzene; L-2 = 1,3-bis[4-(2-pyridyl)pyrimidinylthiomethyl]benzene) with Cdl(2), Znl(2) and Cd(NO3)(2) led to the formation of two discrete bimetallic complexes and one single-handed helix, respectively. Conformation changes of ligands after interactions with metal salts were found due to the positional isomerism of xylyl groups and the effect of anions. (C) 2008 Elsevier B.V. All rights reserved.
Cleavage of C−S Bonds with the Formation of a Tetranuclear Cu(I) Cluster
作者:Chunhui Huang、Shaohua Gou、Haibin Zhu、Wei Huang
DOI:10.1021/ic062059y
日期:2007.7.1
The treatment of a ligand, 2,6-bis((4-(pyridin-2-yl)pyrimidin-2-ylthio)methyl)-4-chlorophenol (ClPPT2), with cuprous chloride under a weak base condition led to the formation of a neutral Cu-4(I)-centered cluster [Cu-4(PPT2)(4)], whose X-ray diffraction analysis indicated that C-S bonds of the ligand were cleaved in the course of the reaction. To explain the C-S bond cleavage, a reasonable mechanism has been proposed. In support of it, four additional ligands, 2,6-bis((4-(pyridin-2-yl)pyrimidin-2-ylthio)methyl)-4-methylphenol (MePPT2), 2,6-bis((4-(pyridin-3-yl)pyrimidin-2-ylthio)methyl)-4-methylphenol (MePPT3), 2,6-bis((4-(pyridin-3-yl)pyrimidin-2-ylthio)methyl)-4-chlorophenol (ClPPT3), and 5-((4-(pyridin-3-yl)pyrimidin-2-ylthio)methyl)-2-hydroxybenzaldehyde (HBPPT2) were further tested to undertake the analogous reaction, and the cleaved products in these experiments were detected by electrospray ionization mass spectrometry techniques to clarify the process.