and potassium in benzene at ambient temperature affords the red or red-brown (7) crystalline salts [K([18]-crown-6)][Lnη5-C5H3(SiMe3)2-1,3}2(C6Η6)] [Ln = La (5), Ce (6), Pr (7), Nd (8)], with [K([18]crown-6)][Cp‘ ‘] as a coproduct. Each of 5−8 is soluble in hot benzene, which allowed the 1H NMR spectra to be recorded. The salt 5 is diamagnetic, consistent with its containing a lanthanate(III) anion
‘[新tricyclopentadienyllanthanoid
金属(III)配合物LnCP中“ 3以良好产率得到从适当的无
水金属(III),
三氟甲磺酸或
氯化和3/2 MGCP]’‘ 2在环境温度下在
四氢呋喃或3 KCP’”的[CP ''=η 5 -C 5 H ^ 3(森达3)2 -1,3和Ln为La(上1)或Pr(3)]。适当的化合物的治疗1或3,或[CECP ' ' 3 ](2)或[NDCP'' 3 ](4),在室温下各有2个当量的([18] -crown-6)和
钾在苯中的化合物提供红色或红棕色(7)结晶盐[K([18] -crown-6)] [Ln η 5 -C 5 H ^ 3(森达3)2 -1,3} 2(C 6 η 6)] [Ln为La(上5),
铈(6),PR(7),
钕(8)],其中[K([18] crown-6)] [CP'']作为副产物。每个5 - 8是溶于热苯,这使得1被记录1