Abstract
The structural geometries of both the clean and CO covered Rh(110) surfaces have been determined by a LEED intensity analysis. The clean surface exhibits a top layer contraction of 0.09 ± 0.02 Å and a second layer expansion of 0.03 ± 0.03 Å relative to the bulk interlayer spacing. Upon the adsorption of 1 ML of CO the molecules are arranged in a zig-zag fashion along the [ 110] direction to produce the observed glide plane symmetry in the LEED pattern. The clean surface relaxations are removed and each CO bonds near a short bridge site with the CO molecular axis oriented approximately 24° from the surface normal. This bonding geometry results in a RhC bond length of 1.97 ± 0.09 Å and a CO bond length of 1.13 ± 0.09 Å.
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