The　grafting　reaction　of　SnMe4　on　the　surface　of　HP　zeolite　(Si/Al　=　25.0)　was　studied　under　high　vacuum　conditions.　The　chemical　compositions　and　structure　of　the　resulting　solid　were　characterized　by　in　situ　FTIR,　ICP,　XRD,　XPS,　C-13　and　Sn-119　MAS　NMR,　UV-Vis　DRS,　gas　phase　chromatograrn　(GC),　chemical　analyses,　temperature　programmed　decomposition　(TPD),　temperature　programmed　reduction　(TPR),　and　N-2　adsorption　at　low　temperature.　The　results　showed　that　SnMe4　reacts　with　H　beta　zeolite　quantitatively　at　temperature　as　low　as　183　K　and　the　reaction　occurred　on　the　surface　of　the　zeolite　without　destroying　the　framework　of　zeolite.　The　BET　surface　area　and　the　pore　volume　of　the　zeolite　decreased　and　the　surface　properties　changed,　however　the　microporous　structure　was　retained　upon　the　reaction　and　post　treatment.　(c)　2005　Elsevier　B.V.　All　rights　reserved.