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除La、Ce、Pr、Nd、Pm及Eu外,其余九种镧系金属均可生成相应的二茂镧系金属氯化物C_(p2)LnCl(Ln=Sm,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu).二茂镧系金属氯化物不仅对水而且对空气(氧)也十分敏感,在空气中暴露很短时间,即发生分解.但它们的热稳定性均较好.由C_(p2)LnCl与NaOAc反应生成的C_(p2)ErOAc及C_(p2)YbOA_c却对空气(氧)均具有较好的稳定性,暴露在空气中48h,颜色和熔点均无明显变化.它们的热稳定性也较好,都可以在160～250℃/10~(-5)Torr下升华提纯.我们采用类似方法,合成了其余七种文献未曾报道的醋酸衍生物C_(p2)LnOAc(Ln=Sm,Gd,Tb,Dy,Ho,Tm,Lu),以考察镧系收缩对从Sm到Lu各种镧系金属二茂醋酸衍生物对空气稳定性的影响,以及它们的热稳定性.
In addition to La, Ce, Pr, Nd, Pm and Eu, the other nine lanthanide metals can generate the corresponding lanthanum-based metal chloride C_ (p2) LnCl (Ln = Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu). Lanthanide lanthanide metal chlorides are not only sensitive to water but also to air (oxygen) and decompose in air for a short time, but their thermal stability is good C_ (p2) ErOAc and C_ (p2) YbOA_c, which were formed by the reaction of C_ (p2) LnCl with NaOAc, showed good stability to air (oxygen) and showed no significant change in color and melting point after exposed to air for 48h They also have good thermal stability and can be sublimed to purify at 160 ~ 250 ℃ / 10 ~ (-5) Torr.We used a similar method to synthesize the acetic acid derivative C_ (p2) which was not reported in the other seven kinds of literature, LnOAc (Ln = Sm, Gd, Tb, Dy, Ho, Tm, Lu) to investigate the effect of lanthanide shrinkage on the air stability of various lanthanide metallocene derivatives from Sm to Lu and their heat stability.