Syntheses of organolanthanum and -cerium cations and labile precursors

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Organometallics; (USA)

DOI:https://doi.org/10.1021/om00116a018· OSTI ID:7170585

Hazin, P N; Bruno, J W ^[1]; Schulte, G K ^[2]

---

1. Wesleyan Univ., Middletown, CT (USA)
2. Yale Univ., New Haven, CT (USA)

The lanthanide-iodide compounds Cp{double prime}{sub 2}Ln(I)(NCMe){sub 2} (Ln = La, Ce; Cp{double prime} = 1,3-C{sub 5}H{sub 3}(SiMe{sub 3}){sub 2}) serve as useful precursors for complexes containing the early-lanthanide fragments (Cp{double prime}{sub 2}Ln{sup III}){sup +}. This moiety has been incorporated into compounds in which it binds either neutral or anionic ligands. Among these is the heterobimetallic compound (Cp{double prime}{sub 2}Ce({mu}-{eta}{sup 2}-OC)W(CO)(Cp) ({mu}-{eta}{sup 2}-CO)){sub 2} (3), which is unusual in that the cerium(III) center is wholly nonemissive. This observation is explained on the basis of cerium-to-tungsten excited-state energy transfer, since dissolution in polar solvent (acetonitrile) leads to symmetrically solvated ions, loss of close Ce-W contact, and cerium(III) luminescence. Finally, the ionic compounds (Cp{double prime}{sub 2}Ln(NCMe)(DME))(BPh{sub 4}){center dot}0.5DME (5) have been prepared and the lanthanum analogue (5b) has been structurally characterized.

• OSTI ID: 7170585
• Journal Information: Organometallics; (USA), Journal Name: Organometallics; (USA) Vol. 9:2; ISSN 0276-7333; ISSN ORGND
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CALCULATION METHODS
CERIUM COMPLEXES
COMPLEXES
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPLEXES
LIGANDS
MEASURING INSTRUMENTS
MEASURING METHODS
NMR SPECTRA
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
RARE EARTH COMPLEXES
SPECTRA
SYNTHESIS