Pentamethylcyclopentadienyl and bis(trimethylsilyl)amido complexes of the di- and trivalent lanthanides
The reaction of the divalent iodides YbI/sub 2/ and EuI/sub 2/ with NaN(SiMe/sub 3/)/sub 2/ has provided pentane-soluble, monomeric derivatives of the divalent lanthanides. These compounds are isolated as the solvated species Eu(N(SiMe/sub 3/)/sub 2/)/sub 2/L/sub 2/ (L = thf or 1,2-dme), Yb(N(SiMe/sub 3/)/sub 2/)/sub 2/(thf)/sub 1/ /sub 5/ and Yb(N(SiMe/sub 3/)/sub 2/)/sub 2/L/sub 2/ (L = 1,2-dme or OEt/sub 2/), or as the sodium salts NaM(N(SiMe/sub 3/)/sub 2/)/sub 3/ (M = Eu or Yb). The pentamethylcyclopentadienyl ligand has been used to obtain trivalent derivatives of the type (C/sub 5/Me/sub 5/)/sub 2/MCl/sub 2/M'L/sub x/ (M = Nd, Sm or Yb; M' = Li or Na; L = OEt/sub 2/ or tmed) or (C/sub 5/Me/sub 5/)/sub 2/MCl(thf) (M = Nd or Yb). These compounds undergo metathesis reactions. The interaction of NaC/sub 5/Me/sub 5/ with EuCl/sub 3/ yields only the divalent (C/sub 5/Me/sub 5/)/sub 2/EuL (L = thf or OEt/sub 2/). Analogous compounds of ytterbium are obtained by reaction of YbI/sub 2/ with NaC/sub 5/Me/sub 5/ in thf or OEt/sub 2/. The ytterbium amine complexes are weakly paramagnetic, apparently due to charge transfer from ytterbium to the aromatic rings. The divalent phosphine complexes (C/sub 5/Me/sub 5/)/sub 2/ML (M = Eu or Yb; L = dmpe or dmpm) are also described. Crystallographic data are summarized.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5194513
- Report Number(s):
- LBL-13155; ON: DE82014272; TRN: 82-013593
- Resource Relation:
- Other Information: Thesis. Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
EUROPIUM COMPLEXES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
STRUCTURAL CHEMICAL ANALYSIS
YTTERBIUM COMPLEXES
AMIDES
AMINES
CRYSTALLOGRAPHY
CYCLOALKENES
ETHERS
LIGANDS
PHOSPHINES
SILICON COMPOUNDS
ALKENES
COMPLEXES
HYDROCARBONS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
RARE EARTH COMPLEXES
SYNTHESIS
400201* - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)