Reaction of rare earth metal-alkyl complexes [Ln(CH2SiMe3)3(THF)2](Ln = Y, Lu) with B(C6X5)3(X = H, F) in the presence of crown ethers gives crystallographically characterized ion pairs [Ln(CH2SiMe3)2(CE)(THF)n]+[B(CH2SiMe3)(C6X5)3]-(CE = [12]-crown-4, n = 1; CE = [15]-crown-5 and [18]-crown-6, n = 0).
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金属-烷基络合物[Ln(CH2SiMe3)3(THF)2](Ln = Y,Lu)与B(C6X5)3(X = H,F)的反应产生了晶体学表征的离子对[Ln(CH2SiMe3)2(CE)(THF)n] + [B(CH2SiMe3)(C6X5)3]-(CE = [12] -cro-4,n = 1; CE = [15] -cro-5和[18] -crown-6,n = 0)。