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- W2024490643 abstract "Eu(C/sub 2/H/sub 4/)/sub n/ complexes have been synthesized at 12 K by codepositing Eu atoms with ethylene, neat or doped in Ar or Xe. UV-visible absorption spectroscopy of the highest stoichiometry product revealed a broad, intense visible transition centered at 537 nm. The complex is unstable above 50 K, consistent with the absence of any evidence for reaction in 77 K metal vapor reactions. Optical spectroscopy of the products formed in dilute matrices indicated the formation of a lower stoichiometry Eu-C/sub 2/H/sub 4/ complex. This was confirmed by infrared studies of absorption in the coupled ..gamma..(C=C)delta(CH/sub 2/) region. Under high dilution conditions, a matrix split 11981182 cm/sup -1/ doublet is assigned to a monoethylene europium ..pi.. complex. Matrix-annealing experiments combined with EuC/sub 2/H/sub 4/ reactions in C/sub 2/H/sub 4/rare-gas matrices of increasing C/sub 2/H/sub 4/ concentration trace the conversion of Eu(C/sub 2/H/sub 4/) to the highest stoichiometry species absorbing at 1233 cm/sup -1/. In general, the Eu(C/sub 2/H/sub 4/)/sub n/ IR spectra are similar to those of matrix-isolated group VIII (8-10) and IB (11) ethylene ..pi.. complexes." @default.
- W2024490643 created "2016-06-24" @default.
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- W2024490643 date "1988-03-01" @default.
- W2024490643 modified "2023-09-25" @default.
- W2024490643 title "Lanthanoid-olefin complex formation: a matrix-isolation ultraviolet-visible and infrared study of the direct synthesis of (C2H4)nEu using europium atoms" @default.
- W2024490643 doi "https://doi.org/10.1021/om00093a028" @default.
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