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Dalton Transactions

The international journal for inorganic, organometallic and bioinorganic chemistry



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Dalton Trans., 2005, 1387 - 1393, DOI: 10.1039/b501437a

Synthesis and characterization of mono -diketiminatosamarium amides and hydrocarbyls

Chunming Cui, Alexandr Shafir, Joseph A. R. Schmidt, Allen G. Oliver and John Arnold

Reaction of SmCl3 with 1 eq of KL (L =[DippNC(Me)CHC(Me)NDipp]; Dipp = 2,6-i-Pr2C6H3) in THF afforded the dimeric samarium dichloride LSmCl2(THF)Cl2SmL ( 1) in high yield. Reactions of 1 with NaN(SiMe3)2, KNHAr (Ar = 2,4,6-t-Bu3C6H2), KBHEt3, and KCp*(Cp*= C5Me5) yielded various new complexes: LSmClN(SiMe3)2( 2), LSm[N(SiMe3)2]2( 3), LSmNHAr(HBEt3)( 4), LSm(NHAr)2( 5), and LSmCp*Cl ( 6). Reaction of 1 with one eq of NaN(SiMe3)2 followed by treatment with excess AlMe3 afforded a unique bimetallic samarium tetramer Cl3L2Sm2(AlMe4)2Sm2L2Cl3( 7). Reaction of 6 with LiMe or LiCH2SiMe3 afforded LSmCp*Me ( 8) and LSmCp*CH2SiMe3( 9) in excellent yield. Methyl abstraction from 8 with B(C6F5)3 in toluene yielded the cationic borate species (LSmCp*)[MeB(C6F5)3]( 10). Molecular structures of 1–7 and 9 were determined by X-ray single crystal analysis.

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