Two Cu(Ⅱ) complexes with title Schiff base ligand H 2L, micro crystal Cu(HL)ClO 4·H 2O and single crystal , have been synthesized and characterized by IR spectra, etc .. By cyclic voltammetry, a quasi reversible...Two Cu(Ⅱ) complexes with title Schiff base ligand H 2L, micro crystal Cu(HL)ClO 4·H 2O and single crystal , have been synthesized and characterized by IR spectra, etc .. By cyclic voltammetry, a quasi reversible electron transferring process has been shown in Cu(Ⅱ)/Cu(Ⅰ) couples reaction of ; the given value E 0 1/2 =-0.73 V has been estimated. The structure of has been determined by X ray diffraction with R =0.036. The results indicate that the deprotonic ligand, as a practically tetradentate, coordinates only with its two imino and two phenoxo groups to form a D 2d symmetric geometry. Two different torsional modes of the homologous ligands, occurring in mono and di nuclear Cu(Ⅱ) complexes, respectively, have been contrasted and discussed.展开更多
A series of bridged ligand 4,4′-methylene-bis [2,6-dialkyl-N-(2-phenylmethylene)-anil] was efficiently synthesized by the condensation reaction of 4,4′-methylene-bis(2,6-disubstituted aniline) and salicyl aldehyde.T...A series of bridged ligand 4,4′-methylene-bis [2,6-dialkyl-N-(2-phenylmethylene)-anil] was efficiently synthesized by the condensation reaction of 4,4′-methylene-bis(2,6-disubstituted aniline) and salicyl aldehyde.They easily coordinated with Ni (Ⅱ) to form the title complexes,which were characterized by IR spectroscopy and elemental analysis.The complexes show good activities for vinyl polymerization of norbornene with methylalumoxane (MAO) as co-catalyst.The variations of complexes and catalytic parameters were investigated along with viscosimetric measurement of resultant polynorbornenes.展开更多
文摘Two Cu(Ⅱ) complexes with title Schiff base ligand H 2L, micro crystal Cu(HL)ClO 4·H 2O and single crystal , have been synthesized and characterized by IR spectra, etc .. By cyclic voltammetry, a quasi reversible electron transferring process has been shown in Cu(Ⅱ)/Cu(Ⅰ) couples reaction of ; the given value E 0 1/2 =-0.73 V has been estimated. The structure of has been determined by X ray diffraction with R =0.036. The results indicate that the deprotonic ligand, as a practically tetradentate, coordinates only with its two imino and two phenoxo groups to form a D 2d symmetric geometry. Two different torsional modes of the homologous ligands, occurring in mono and di nuclear Cu(Ⅱ) complexes, respectively, have been contrasted and discussed.
文摘A series of bridged ligand 4,4′-methylene-bis [2,6-dialkyl-N-(2-phenylmethylene)-anil] was efficiently synthesized by the condensation reaction of 4,4′-methylene-bis(2,6-disubstituted aniline) and salicyl aldehyde.They easily coordinated with Ni (Ⅱ) to form the title complexes,which were characterized by IR spectroscopy and elemental analysis.The complexes show good activities for vinyl polymerization of norbornene with methylalumoxane (MAO) as co-catalyst.The variations of complexes and catalytic parameters were investigated along with viscosimetric measurement of resultant polynorbornenes.
