Chelate Ring Size Variations and Their Effects on Coordination Chemistry and Catechol Dioxygenase Reactivity of Iron(III) Complexes
作者:Michael Merkel、Matthias Pascaly、Bernt Krebs、Jörg Astner、Simon P. Foxon、Siegfried Schindler
DOI:10.1021/ic050708k
日期:2005.10.1
bromo-(tetrachlorocatecholato-O,O')(bis((2-pyridyl)methyl)-2-pyridylamine-N,N',N' ')-iron(III), (mu-oxo)-bis(bromo)(bis((2-pyridyl)methyl)-2-pyridylamine-N,N',N' ',N''')-diiron(III), dichloro-((2-(2-pyridyl)ethyl)bis((2-pyridyl)methyl)amine-N,N',N' ',N''')-iron(III) and (tetrachlorocatecholato-O,O')((2-(2-pyridyl)ethyl)bis((2-pyridyl)methyl)amine-N,N ',N' ',N''')-iron(III) are reported.
研究了使用三脚架配体的铁(III)配合物的邻苯二酚二加氧酶反应性。高活性复合物[Fe(tmpa)(dbc)] B(C6H5)4(tmpa =三[(2-吡啶基)甲基]胺; dbc = 3,5-di -叔丁基邻苯二酚二阴离子),使用相关的配体,只会导致所研究化合物的反应性降低。对双氧与[Fe(tmpa)(dbc)] B(C6H5)4的反应进行了详细的低温停止流研究,其活化参数为DeltaH ++ = 23 +/- 1 kJ mol(-1)和获得DeltaS ++ = -199 +/- 4 J mol(-1)K(-1)。溴-(四氯儿茶酚-O,O')(双((2-吡啶基)甲基)-2-吡啶胺-N,N',N'')-铁(III),(μ-氧代)-双的晶体结构(溴)(双((2-吡啶基)甲基)-2-吡啶胺-N,N',N'',N'''