Insertion of carbodiimide into the Ln-N sigma-bond of organolanthanide complexes. Synthesis and characterization of organolanthanide guanidinates (C5H5)(2)Ln[(PrN)-Pr-i C((NPr2)-Pr-i) (NPr)-Pr-i] (Ln = Yb, Dy, Gd)

The synthesis and structures of three new lanthanide complexes incorporating tetra-substituted guanidinate ligand [(PrN)-Pr-i-C((NPr2)-Pr-i)-(NPr)-Pr-i] are described. Treatment of Cp(2)LnN(i)Pr(2)(-THF) (Ln = Yb, Dy, Gd) with N,N'-di-isopropyl-carbodiimide results in mono-insertion of carbodii...

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Bibliographic Details
Published inJournal of organometallic chemistry Vol. 672; no. 1-2; pp. 94 - 99
Main Authors Zhang, J, Cai, RF, Weng, LH, Zhou, XG
Format Journal Article
LanguageEnglish
Published LAUSANNE Elsevier 14.04.2003
Subjects
Chemistry
Chemistry, Inorganic & Nuclear
Chemistry, Organic
Physical Sciences
Science & Technology
ANIONS
LN=DY
structures
REACTIVITY
RAY CRYSTAL-STRUCTURE
HYDRIDE
LIGANDS
cyclopentadienyl
X-RAY
CHEMISTRY
IMIDO
insertion
carbodiimide
METAL
organolanthanide
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Summary:The synthesis and structures of three new lanthanide complexes incorporating tetra-substituted guanidinate ligand [(PrN)-Pr-i-C((NPr2)-Pr-i)-(NPr)-Pr-i] are described. Treatment of Cp(2)LnN(i)Pr(2)(-THF) (Ln = Yb, Dy, Gd) with N,N'-di-isopropyl-carbodiimide results in mono-insertion of carbodiimide into the Ln-N sigma-bond to yield Cp(2)Ln[(PrN)-Pr-i-C((NPr2)-Pr-i)-(NPr)-Pr-i] (Ln=Yb(1), Dy(2), Gd(3)), providing an efficient method for the synthesis of organolanthanide guanidinate complexes. It was found that an excess of N,N'-diisopropyl-carbodiimide did not affect the nature of the final product. Complexes 1-3 were characterized by elemental analysis, IR and mass spectroscopies. Complexes I and 2 were determined by the X-ray single crystal diffraction analysis. (C) 2003 Elsevier Science B.V. All rights reserved.
ISSN:0022-328X
1872-8561
DOI:10.1016/S0022-328X(03)00147-5