An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of t...An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.展开更多
The intramolecularly bridged alkyl cobaltic complexes are one of important coenzyme B12 model coplexes. In this paper, study on the thermolytic reaction of aqua(3 bromopropyl)cobaloximes in solution revealed that a ne...The intramolecularly bridged alkyl cobaltic complexes are one of important coenzyme B12 model coplexes. In this paper, study on the thermolytic reaction of aqua(3 bromopropyl)cobaloximes in solution revealed that a new intramolecularly bridged alkyl cobaloximes complex was formed and the reaction is influenced by tempertature and solvent. Adding cyclodxtrin has no obvious effect to the rate of the reaction, but various products with different axial bases were obtained. The intramolecularly bridged alkyl cobaloxime complex (bromo(O trimethylene dimethy lglyoxime)(dimethylglyoximate)cobalt?) was characterized by EA and ESI MS. Thermogravimetric analysis of this complex found that a carbon radical that from homolysis of the Co C bond is retained in the proximity of CoⅡ complex, which is very similar to the behavior of coenzyme B12.展开更多
文摘An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.
文摘The intramolecularly bridged alkyl cobaltic complexes are one of important coenzyme B12 model coplexes. In this paper, study on the thermolytic reaction of aqua(3 bromopropyl)cobaloximes in solution revealed that a new intramolecularly bridged alkyl cobaloximes complex was formed and the reaction is influenced by tempertature and solvent. Adding cyclodxtrin has no obvious effect to the rate of the reaction, but various products with different axial bases were obtained. The intramolecularly bridged alkyl cobaloxime complex (bromo(O trimethylene dimethy lglyoxime)(dimethylglyoximate)cobalt?) was characterized by EA and ESI MS. Thermogravimetric analysis of this complex found that a carbon radical that from homolysis of the Co C bond is retained in the proximity of CoⅡ complex, which is very similar to the behavior of coenzyme B12.
