Binuclear organo-rare-earth-metal complexes containing silicon-linked cyclopentadienyl ligands in either a chelating or metal-bridging fashion: A mass spectrometric study

Journal Article · Tue May 01 00:00:00 EDT 1990 · Organometallics; (USA)

DOI:https://doi.org/10.1021/om00119a001· OSTI ID:6520184

Qiao, Ke; Fischer, R D ^[1]; Paolucci, G ^[2]; Traldi, P ^[3]; Celon, E ^[4]

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1. Universitaet Hamburg (West Germany)
2. Universita di Venezia (Italy)
3. Servizio di Spettrometria di Massa del CNR Padova (Italy)
4. Universita di Padova (Italy)

Four chloride-bridged, binuclear bis(cyclopentadienyl) rare-earth-metal complexes have been subjected to detailed mass spectrometric studies adopting exhaustively the B/E-linked scan technique: (Me{sub 2}Si(C{sub 5}H{sub 4}){sub 2}Yb({mu}-Cl)){sub 2} (1), ((Me{sub 3}SiC{sub 5}H{sub 4}){sub 2}Yb({mu}-Cl)){sub 2} (2), (Me{sub 2}Si(C{sub 5}H{sub 4}){sub 2}Y({mu}-Cl)){sub 2} (3), and Me{sub 2}Si(C{sub 5}H{sub 4}){sub 2}Yb({mu}-Cl){sub 2}Y(C{sub 5}H{sub 4}){sub 2}SiMe{sub 2} (5). The strict dominance of binuclear fragments in the spectrum of pure 1 indicates, in excellent accordance with a previous crystallographic X-ray study, the presence of metal-bridging Me{sub 2}Si(C{sub 5}H{sub 4}){sub 2} ligands in the vapor state. The existence of the new complex 5, which could not be separated chemically from admixtures of 1 and 3 (i.e., from sample 4), has been confirmed unambiguously by deducing its individual fragmentation pattern from a systematic B/E-linked scan analysis.

• OSTI ID: 6520184
• Journal Information: Organometallics; (USA), Vol. 9:5; ISSN 0276-7333
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RARE EARTH COMPLEXES
MASS SPECTROSCOPY
CHLORIDES
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
ORGANOMETALLIC COMPOUNDS
YTTERBIUM
YTTRIUM
CHLORINE COMPOUNDS
COMPLEXES
DATA
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
RARE EARTHS
SPECTROSCOPY
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties