Kinetic studies on the electron transfer(ET) reaction of [Co(NH3)5(ImH)]3+/[Fe(CN)6]4- and trans-[Co(NH3)(en)2(ImH)]3+/[Fe(CN)6]4- have been carried out at various temperatures. The results indicated that these two ET...Kinetic studies on the electron transfer(ET) reaction of [Co(NH3)5(ImH)]3+/[Fe(CN)6]4- and trans-[Co(NH3)(en)2(ImH)]3+/[Fe(CN)6]4- have been carried out at various temperatures. The results indicated that these two ET reactions followed the outersphere mechanism. At 25℃,I=0.50mol’L-1, the ion pair formation constants Qip ofthe prectirsor complexes in the ET reactions are 2.6×102 and 4.9 × 1O2mol’L-1 ,and theelectron transfer rate constants kct are 2.1 ×10-4 and 5.2 ×10-5s-1 respectively. The activation enthalpy and the activation entropy of these two processes are 1.2×1O2,0.8 ×102kJ ’mol -1 and 5. 1×102, 3.6 ×102J·mol-1 ·K-1 respectively.展开更多
A new coordi nation comp ound Co(Ⅲ)abstract:Hdmg)abstract: 2 (H 2 O)abstract: 2 Mn(Ⅱ)abstract:Cl 3 was synthesized and its crystal structure was determined.The crystal data ar e as follows:crystal system,orthorhombi...A new coordi nation comp ound Co(Ⅲ)abstract:Hdmg)abstract: 2 (H 2 O)abstract: 2 Mn(Ⅱ)abstract:Cl 3 was synthesized and its crystal structure was determined.The crystal data ar e as follows:crystal system,orthorhombic;space group,C222 1 (#20)abstract:;a=1.18315(3)abstract:nm,b=1.28631(5)abstract:nm,c=1.14355(2)abstract:nm,V=1.74037(9)abstract:nm 3 ,Z=4,D c =1.857g·cm -3 ,F(000)abstract:=980.00,μ (MoK α )abstract:=21.69cm -1 ,R 1 =0.030,wR 2 =0.92.The coordination geometries around Co(Ⅲ)abstract:and Mn(Ⅱ)abstract:atoms are distorted o ct ahedral and distorted trigonal bipyramidal,respectively.The Hdmg chelates Co( Ⅲ)abstract:an d bridges to two Mn(Ⅱ)abstract:atoms to form a polyheteronuclear helical structure alo ng t he c axis.展开更多
文摘Kinetic studies on the electron transfer(ET) reaction of [Co(NH3)5(ImH)]3+/[Fe(CN)6]4- and trans-[Co(NH3)(en)2(ImH)]3+/[Fe(CN)6]4- have been carried out at various temperatures. The results indicated that these two ET reactions followed the outersphere mechanism. At 25℃,I=0.50mol’L-1, the ion pair formation constants Qip ofthe prectirsor complexes in the ET reactions are 2.6×102 and 4.9 × 1O2mol’L-1 ,and theelectron transfer rate constants kct are 2.1 ×10-4 and 5.2 ×10-5s-1 respectively. The activation enthalpy and the activation entropy of these two processes are 1.2×1O2,0.8 ×102kJ ’mol -1 and 5. 1×102, 3.6 ×102J·mol-1 ·K-1 respectively.
文摘A new coordi nation comp ound Co(Ⅲ)abstract:Hdmg)abstract: 2 (H 2 O)abstract: 2 Mn(Ⅱ)abstract:Cl 3 was synthesized and its crystal structure was determined.The crystal data ar e as follows:crystal system,orthorhombic;space group,C222 1 (#20)abstract:;a=1.18315(3)abstract:nm,b=1.28631(5)abstract:nm,c=1.14355(2)abstract:nm,V=1.74037(9)abstract:nm 3 ,Z=4,D c =1.857g·cm -3 ,F(000)abstract:=980.00,μ (MoK α )abstract:=21.69cm -1 ,R 1 =0.030,wR 2 =0.92.The coordination geometries around Co(Ⅲ)abstract:and Mn(Ⅱ)abstract:atoms are distorted o ct ahedral and distorted trigonal bipyramidal,respectively.The Hdmg chelates Co( Ⅲ)abstract:an d bridges to two Mn(Ⅱ)abstract:atoms to form a polyheteronuclear helical structure alo ng t he c axis.
