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Title: pi. bonded intermediates in alcohol oxidation: Orientations of allyloxy and propargyloxy on Ag(110) by near edge x-ray absorption fine structure

Abstract

The orientation of allyl alcohol (CH/sub 2/ = CHCH/sub 2/OH), propargyl alcohol (CH 3/4 CCH/sub 2/OH), and their surface alkoxy groups has been examined on Ag(110) using near edge x-ray absorption fine structure (NEXAFS) measurements. The planes containing the ..pi..* orbitals of allyl alcohol and its alkoxy species, allyloxy (CH/sub 2/ = CHCH/sub 2/O-), are tilted 26 +- 4/sup 0/ and 32 +- 5/sup 0/ from the surface normal, respectively. Allyl alcohol itself shows no azimuthal ordering, but the ..pi..* orbital in allyloxy is azimuthally oriented 33 +- 15/sup 0/ from the close-packed direction ((11-bar0) azimuth). Propargyl alcohol is randomly oriented on the Ag(110) surface. Its alkoxy group, propargyloxy (CH 3/4 CCH/sub 2/O-), is strongly oriented with the triple bond axis parallel to the plane of the surface and directed along the (001) azimuth, perpendicular to the troughs. The position of the sigma* resonances indicate that no loss of the allylic hydrogen has occurred and that the double and triple bonds are slightly, but not significantly, perturbed from their normal gas phase bond lengths.

Authors:
; ;
Publication Date:
Research Org.:
Department of Chemical Engineering, Stanford University, Stanford, California 94305
OSTI Identifier:
6779492
Resource Type:
Journal Article
Journal Name:
J. Chem. Phys.; (United States)
Additional Journal Information:
Journal Volume: 89:8
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALCOHOLS; OXIDATION; REACTION INTERMEDIATES; ALIGNMENT; ORIENTATION; SILVER; SURFACE PROPERTIES; ALKOXY RADICALS; CHEMICAL BONDS; SURFACES; X-RAY SPECTROSCOPY; CHEMICAL REACTIONS; ELEMENTS; HYDROXY COMPOUNDS; METALS; ORGANIC COMPOUNDS; RADICALS; SPECTROSCOPY; TRANSITION ELEMENTS; 400201* - Chemical & Physicochemical Properties

Citation Formats

Solomon, J L, Madix, R J, and Stoehr, J. pi. bonded intermediates in alcohol oxidation: Orientations of allyloxy and propargyloxy on Ag(110) by near edge x-ray absorption fine structure. United States: N. p., 1988. Web.
Solomon, J L, Madix, R J, & Stoehr, J. pi. bonded intermediates in alcohol oxidation: Orientations of allyloxy and propargyloxy on Ag(110) by near edge x-ray absorption fine structure. United States.
Solomon, J L, Madix, R J, and Stoehr, J. Sat . "pi. bonded intermediates in alcohol oxidation: Orientations of allyloxy and propargyloxy on Ag(110) by near edge x-ray absorption fine structure". United States.
@article{osti_6779492,
title = {pi. bonded intermediates in alcohol oxidation: Orientations of allyloxy and propargyloxy on Ag(110) by near edge x-ray absorption fine structure},
author = {Solomon, J L and Madix, R J and Stoehr, J},
abstractNote = {The orientation of allyl alcohol (CH/sub 2/ = CHCH/sub 2/OH), propargyl alcohol (CH 3/4 CCH/sub 2/OH), and their surface alkoxy groups has been examined on Ag(110) using near edge x-ray absorption fine structure (NEXAFS) measurements. The planes containing the ..pi..* orbitals of allyl alcohol and its alkoxy species, allyloxy (CH/sub 2/ = CHCH/sub 2/O-), are tilted 26 +- 4/sup 0/ and 32 +- 5/sup 0/ from the surface normal, respectively. Allyl alcohol itself shows no azimuthal ordering, but the ..pi..* orbital in allyloxy is azimuthally oriented 33 +- 15/sup 0/ from the close-packed direction ((11-bar0) azimuth). Propargyl alcohol is randomly oriented on the Ag(110) surface. Its alkoxy group, propargyloxy (CH 3/4 CCH/sub 2/O-), is strongly oriented with the triple bond axis parallel to the plane of the surface and directed along the (001) azimuth, perpendicular to the troughs. The position of the sigma* resonances indicate that no loss of the allylic hydrogen has occurred and that the double and triple bonds are slightly, but not significantly, perturbed from their normal gas phase bond lengths.},
doi = {},
url = {https://www.osti.gov/biblio/6779492}, journal = {J. Chem. Phys.; (United States)},
number = ,
volume = 89:8,
place = {United States},
year = {1988},
month = {10}
}