Oligomerization of trimethylsilyl acetylene to form large molecules on reduced surfaces of TiO2(001) Academic Article uri icon

abstract

  • The catalytic cyclotrimerization of alkynes on reduced TiO2(0 0 1) surfaces has been explored to probe the active sites for carbon-carbon bond formation. The influence of surface-adsorbate interactions on the reaction mechanism was further probed by studies designed to characterize the steric effects of differently functionalized alkynes. The chemistry of trimethylsilyl acetylene on surfaces containing Ti2+ sites clearly demonstrates that cyclotrimerization of heteroatom-containing alkynes is feasible. Trimethylsilyl acetylene can be cyclized to form tris-(trimethylsilyl)-benzene on the reduced titania surface. However, the principal product on both reduced and stoichiometric surfaces of TiO2(0 0 1) is the hydrogenation product, trimethylvinylsilane (TMVS). The low yield of oligomeric products is attributed to the steric effect of the bulky trimethylsilyl group. 2002 Elsevier Science B.V. All rights reserved.

published proceedings

  • JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

author list (cited authors)

  • Sherrill, A. B., & Barteau, M. A.

citation count

  • 9

complete list of authors

  • Sherrill, AB||Barteau, MA

publication date

  • June 2002