Surface Structure and Bonding of Acetylene to the Platinum (111) Surface

Abstract

Analysis of low-energy-electron-diffraction beam intensities for a 2\ifmmode\times\else\texttimes\fi{}2 chemisorbed layer of acetylene on the Pt(111) surface shows that the molecules are adsorbed in either a threefold position or a twofold bridge position at a distance of 1.95\ifmmode\pm\else\textpm\fi{}0.10 \AA{} above the topmost plane of platinum atoms.