Inhibition of the [2+2] cycloaddition: maleic anhydride on Si(100)-2x1

T Bitzer, T Rada, Neville Vincent Richardson

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


The chemisorption of maleic anhydride on Si(100)-2x1 at room temperature has been studied with scanning tunneling microscopy (STM). We observe that, at low coverages below 0.12 monolayer, the unsaturated organic compound adsorbs almost exclusively on inter-dimer sites and not through a direct [2+2] cycloaddition. The STM images provide evidence that the adsorption of a second maleic anhydride molecule on an adjacent inter-dimer site results in the cleavage of the silicon dimer bond located between the two molecules. The chemisorption of the organic molecules induces a local rearrangement of unsaturated silicon dimers.

Original languageEnglish
Pages (from-to)4535-4537
Number of pages3
JournalJournal of Physical Chemistry B
Publication statusPublished - 24 May 2001




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