measurements have been made on the reactions of [Ru(NH3)5(OH2)]2+ with [Co(NH3)5X]2+(X = SCN, NCS, or N3) in aqueous solution. The reactions obey second-order rate laws with the following kinetic parameters at 25 °C, I= 0.20 mol dm–3(LiCl), and [H+]= 0.10 mol dm–3(HCl): kSCN=(1.7 ± 0.10)× 102, kN3= 0.61 ± 0.02, and kNCS= 0.28 ± 0.01 dm3 mol–1 s–1; ΔH‡SCN= 35.1 ± 2.9 kJ mol–1, ΔS‡SCN=–84.5 ± 7.5 J K–1 mol–1,
对[Ru(NH 3)5(OH 2)] 2+与[Co(NH 3)5 X] 2+(X = SCN,
NCS或N 3)在
水溶液中的反应进行了动力学测量。在25°C时,反应遵循以下动力学参数的二阶速率定律,I = 0.20 mol dm –3(LiCl),[H + ] = 0.10 mol dm –3(HCl):k SCN =(1.7± 0.10)×10 2,k N 3 = 0.61±0.02和k
NCS = 0.28±0.01 dm 3 mol–1 s –1 ; Δ ħ ‡ SCN = 35.1±2.9千焦耳摩尔-1,Δ小号‡ SCN = -84.5±7.5 JK -1摩尔-1,Δ ħ ‡ Ñ 3 = 55.2±1.7千焦耳摩尔-1,Δ小号‡ Ñ 3 = - (63.2±8.4)JK –1 mol –1, ΔH ‡
NCS = 61.9±3.3 kJ mol –1, ΔS ‡
NCS = –47.3±5