in a pseudo-mer coordination mode. In contrast to the typical metathesis chemistry observed with LiCH(SiMe3)2, an unusual oxidation occurs when 2 or 3 is treated with LiCH2SiMe3 to generate the previously isolated trivalent alkyl (Czx)Yb(CH2SiMe3)2. Trivalent Yb complexes with the Czx ligand also display unusual redox chemistry: rapid reduction to the Yb(II) phosphides 7a,b is observed on treatment
1,8-双(4',4'-二甲基
恶唑啉-2'-基)-
3,6-二叔丁基咔唑阴离子(
CZx)形成Yb(II)的单体六配位卤化物络合物(
CZx )Yb(X)(THF)2(X = I(2),Cl(3)),通过用Na
CZx(1)置换YbX 2或(
CZx)Yb(Cl)2(THF)的Na / Hg还原。的晶体结构1揭示的聚合链结构,其中
恶唑啉环桥中的Na +的相邻单元的。
碘络合物2充当二价甲
硅烷基酰胺,烷基和
磷化物络合物的前体,(
CZx)Yb(X)(THF)n(4,X = N(SiMe 3)2,n = 1; 5,X = CH(SiMe 3)2,n= 1;n= 1。在图7a中,X = 2,4,6-Me 3 C 6 H 2 PH,n= 2;在图7b中,X = 2,4,6-Pr i 3 C 6 H 2 PH,n= 2)。的X射线结构4揭示了一个扭曲-三角-双锥与
CZX
配体占据两个轴向位点,并在伪一个赤道现场聚体