Rates of formation and dissociation of complexes of manganese(<scp>II</scp>) with the ligands 1,10-phenanthroline, 2,2′-bipyridine, and 2,2′2″-terpyridine in anhydrous methanol
作者:D. J. Benton、P. Moore
DOI:10.1039/dt9730000399
日期:——
Rate constants for the formation (kf) and dissociation (kd) of complexes of MnII with the ligands 1,10-phenanthroline (phen), 2,2′-bipyridine (bipy), and 2,2′,2″-terpyridine (terpy) have been measured, at low temperatures in anhydrous methanol, by the stopped-flow method. At 298·1 K and I= 0·20 mol l–1(NaClO4) : log (kf/l mol–1 s–1)(extrapolated)= 4·95, 4·24, and 3·72; ΔHf‡= 10·6 ± 0·4, 11·7 ± 0·1
Mn II与配体1,10-菲咯啉(phen),2,2'-联吡啶(bipy)和2,2',2''的配合物的形成(k f)和解离(k d)的速率常数-terpyridine(terpy)的测定是在低温下于无水甲醇中通过定流方法进行的。在298·1 K且I = 0·20 mol l -1(NaClO 4)时:log(k f / l mol –1 s –1)(外推)= 4·95、4·24和3·72;Δ ħ ˚F ‡ = 10·6±0·4,11·7±0·1和12·8±1·0千卡摩尔-1 ; Δ小号˚F ‡= –0·4±1·6、0·1±0·1和1·3±3·9 cal K –1 mol –1;log(k d / s –1)= 1·15、1·57和–1·33;Δ ħ d ‡ = 13·5±0·3。13·4±0·5。和13·7±0·6 kcal mol –1;和Δ小号d ‡ = -8·2±0·9,-6·4±1·9,和-18±2卡ķ