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- W2000450480 abstract "The action of bromine and chlorine on surface carbonyl complexes of platinum, rhodium, and irdium has been studied by ir spectroscopy. At room temperature chlorine and bromine cause partial removal of chemisorbed CO molecules, and produce two other main effects. The stretching frequency of the remaining CO molecules progressively shifts to higher values, corresponding to an increase of the CO bond strength, due to a lowering of the electron back donation dπ → 2π∗ from the metal to the 2π∗ antibonding orbitals of the chemisorbed CO molecules. This electron-withdrawing ligand effect of halogen is a long-range effect which uses the collective properties of the metal surface. In the case of Rh and Pt, new carbonyl species which exhibit ir bands at higher frequencies (range 2100–2135 cm−1) have also been detected; the corresponding metal atoms are oxidized. The observation that these metal atoms are insensitive to the ligand electron-donor effect of P(CH3)3 is justified in terms of “demetallization”." @default.
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- W2000450480 date "1981-06-01" @default.
- W2000450480 modified "2023-09-30" @default.
- W2000450480 title "Interactions of chlorine and bromine with chemisorbed carbon monoxide on evaporated platinum, rhodium, and iridium films" @default.
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- W2000450480 doi "https://doi.org/10.1016/0021-9517(81)90162-7" @default.
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