redox-active 2,2′-bipyridine (bipy) as a synthetically convenient electron carrier to enable lanthanide metallocenes to effect two-electron reduction chemistry has been examined. The Ln(III) precursor complexes, Cp*2LnCl(bipy), 1-Ln (Ln = Nd, Gd; Cp* = C5Me5), were readily synthesized in 75–81% yield in one pot from LnCl3, KCp*, and bipy and were identified by X-ray crystallography. Treatment of the 1-Ln
已经研究了使用具有氧化还原活性的
2,2'-联吡啶 (bipy) 作为合成方便的电子载体以使
镧系
金属茂能够影响双电子还原
化学的可行性。Ln(III) 前体复合物 Cp* 2 LnCl(bipy), 1-Ln(Ln = Nd, Gd;Cp* = C 5 Me 5)很容易在一锅中从 LnCl 3以 75–81% 的产率合成、KCp* 和 bipy,并通过 X 射线晶体学鉴定。用 K/KI (4.3 wt%)处理1-Ln化合物得到 74–77% 的产物,Cp* 2 Ln(bipy), 2-Ln,其中包含 (bipy) 1–
配体基于它们的光谱特性和 X 射线晶体结构。还确定了先前报道的2-Eu的分子结构,其结构特征与中性 bipy
配体一致。2-Nd或2-Gd或先前报道的2-Sm、2-Eu和2-Yb与 K/KI (4.3 wt%) 在 2.2.2-cryptand (crypt) 存在下的进一步还原58–88%