Characterization and reactivity of peralkylated LnIIAlIII heterobimetallic complexes.
The heterobimetallic peralkylated complexes [Ln(AlR4)2]n (Ln = Sm, Yb; R = Me, Et) were synthesized by a silylamide elimination route from Ln[N(SiMe3)2]2(THF)2 and an excess of AlR3. The solid-state structure of [Sm(AlEt4)2]n is isomorphous to that of the ytterbium derivative. Polymeric [Yb(AlMe4)2]n was examined by 1H and 13C MAS NMR spectroscopy revealing the presence of distinct bridging methyl groups. The reaction of [Yb(AlMe4)2]n and 1,10-phenanthroline (Phen) afforded the monomeric donor adduct Yb(AlMe4)2(Phen), while the protonolysis reaction with 2 equiv. C5Me5H (HCp*) yielded a separated ion pair of composition [Cp*Yb(THF)(4)][AlMe(4)]. Single-crystal X-ray diffraction data are provided for both ytterbium(II) complexes. Solid-state magnetic measurements (SQUID) were performed on [Sm(AlMe4)2]n, [Sm(AlEt4)2]n, SmI2(THF)2 and Sm[N(SiMe3)2]2(THF)2 showing high effective magnetic moments 3.67micro(B) < micro(eff) < 4.43micro(B).
Sommerfeldt
Hanne-Marthe
HM
Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway.
Meermann
Christian
C
Schrems
Marcus G
MG
Törnroos
Karl W
KW
Frøystein
Nils Age
NA
Miller
Robert J
RJ
Scheidt
Ernst-Wilhelm
EW
Scherer
Wolfgang
W
Anwander
Reiner
R
D000535:Aluminum / Q000737:chemistry*; D018360:Crystallography, X-Ray; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D012015:Reference Standards; D013237:Stereoisomerism
D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds; D000535:Aluminum