ΔS≠/JK−1mol−1 = +28 ± 10, +68 ± 35. For the Rev complex, pyridine and oxygen exchanges have been measured simultaneously by 1H- and 17O-NMR in deuterated water: k298/s−1 = (8.6 ± 0.2) × 10−6 (py), (14.5 ± 0.3) × 10−6 (oxygen); ΔH≠/kJmol−1 = 111 ± 1, 91 ± 1; ΔS /JK−1mol−1 = +32 ± 3, −32 ± 4. For both complexes, the rate law for pyridine exchange is first-order in complex and zero-order in pyridine; together with
在反式-[MO 2(py)4 ] +上进行
吡啶交换的动力学,随后在CD 3 NO 2中进行1 H-NMR,M = Re,Tc:k 298 S -1 =(5.5±0.1)×10 -6,0.04±0.02; Δ ħ ≠ / kJMOl -1 = 111±3,±101 9; Δ小号≠ / JK -1摩尔-1 = 28±10,±68 35为重v复杂,
吡啶和氧交换已经同时被测量的1 H-和17
氘水中的O-NMR:k 298 / s -1 =(8.6±0.2)×10 -6(py),(14.5±0.3)×10 -6(
氧气);Δ ħ ≠ / kJMOl -1 = 111±1,±91 1; Δ小号/ JK -1摩尔-1 = 32±3,±-32 4.对于这两种络合物,
吡啶交换速率定律是一阶复杂和零级的
吡啶; 连同活化参数值以及速率不明显取决于溶剂的性质的事实,这强烈暗示了离解机制的操作。室温下Tc和Re络合物的
吡啶交换率之比约为。8000