Models for the iron-sulfur protein rubredoxin: the use of sterically hindered thiolate ligands to stabilize [Fe(SR)4]1− complexes; some considerations of the structure of the [Fe(S-Cys)4] centers in oxidized rubredoxins
作者:Michelle Millar、Joe F. Lee、Timothy O'Sullivan、Stephen A. Koch、Ronald Fikar
DOI:10.1016/0020-1693(96)04924-9
日期:1996.2
Abstract Sterically hindered aromatic thiolate ligands have been used to synthesize the first examples of [FeIII(SR)4]1− complexes with monodentate ligands. The reaction of FeCl3 with 4 equiv. of lithium 2,3,5,6-tetramethylbenzenethiolate, Li[S-2,3,5,6-Me4C6H], lithium 2,4,6-triisopropylbenzenethiolate, Li[S-2,4,6-i-Pr3CC6H2] and the appropriate cation gives high yields of [Et4N][Fe(S-2,3,5,6-Me4C6H)4]
摘要立体位阻芳族硫醇盐配体已用于合成具有单齿配体的[FeIII(SR)4] 1-配合物的第一个实例。FeCl 3与4当量的反应。2,3,5,6-四甲基苯硫醇锂,Li [S-2,3,5,6-Me4C6H],2,4,6-三异丙基苯硫醇锂,Li [S-2,4,6-i-Pr3CC6H2]并且适当的阳离子可产生高产率的[Et4N] [Fe(S-2,3,5,6-Me4C6H)4](1)和[Ph4P] [Fe(S-2,4,6-i-Pr3C6H2) 4],分别为(2)。化合物1和2通过X射线衍射在结构上表征,给出晶体学参数:对于1,四角形空间群I 4,a = b = 12.366(2),c = 16.352(4)A,V = 2500 A 3,Z = 2; 对于2,三斜空间组P 1,a = 14.709(2);b = 20.928(5);c = 13.901(2)A,α= 90.97(3)°,β= 105.43(3)°,γ=