which capping and bridging TMP groups interchange, as well as a minor form that appears to be an intermediate in this complicated exchange phenomenon. Investigation of 1 has uncovered two distinct reactivities. Two of its peripheral t-butyl carbanions formally deprotonate toluene at the lateral methyl group to generate benzyl ligands that replace these carbanions in [Na4(TMP)4Zn4(tBu)2(CH2Ph)2(C5H3)2Fe}]
区域选择性1,1',3,3'- tetrazincation [C-H至C-Zn系(吨丁基)]
二茂铁的已经由四倍过量的反应来实现二吨-butylzinc(吨卜2 Zn)的
钠三
金属
铁-
钠-
锌络合物[Na 4(
TMP)4 Zn 4(t Bu)4 (C 5 H 3)2 Fe}]中显示的
2,2,6,6-四甲基哌啶(Na
TMP)在己烷溶液中的存在,1。DFT建模支持的X射线晶体学研究表明,该结构是一个开放的反向冠,其中两个[Na(
TMP)Zn(t Bu)Na(
TMP)Zn(tBu)] 2+阳离子单元围绕(C 5 H 3)2 Fe} 4-四阴离子。详细的C 6 D 6 NMR研究确定了该配合物的1 H和13 C
化学位移过多。它以封顶和桥接
TMP组互换的主要形式存在,而次要形式似乎是这种复杂交换现象的中间形式。对1的调查发现了两个不同的反应性。它的两个周边叔丁基碳负离子在甲基侧基上使
甲苯去质子化,生