Abstract

The structure of the Ni(110)-(2 × 1)2CO system, which has a (001) glide plane, has been determined by LEED intensity analysis. The characterization is unusual in that a large number of parameters are determined. The structure itself is unique among previously determined structures because it involves two different CO tilt angles. Two structural characterizations and five quantitative structural parameters have been determined. CO is molecularly bonded to the short bridge site with different metal-C and C-O tilt angles of 27° and 17°, respectively. The clean metal contraction is relaxed by the presence of the CO.

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