In　near　Bohr　velocity　ion-atom　collisions,　a　dependence　of　target　K-shell　ionization　cross　sections　upon　the　ionic　charge　states　has　been　observed.　Experiments　were　performed　in　silicon　solid　target　with　2-5　MeV　iodine(q+)　ions　incident　in　charge　states　+20　to　+25.　K-shell　ionization　cross　section　of　silicon　for　q　=　20　and　22　iodine　ions　impact　with　the　same　incident　energy　are　almost　equal,　and　are　well　described　by　the　theory　of　binding-energy-modified　BEA.　However,　for　q　=　25　iodine　ions　collisions,　3d　vacancies　of　projectile　transfer　to　the　1s　orbit　of　target　atom　via　rotational　coupling　of　3d　pi,　delta-3d　sigma　molecular　orbits　in　the　framework　of　quasi-molecular　model,　which　results　in　an　increase　of　the　K-shell　ionization　cross　section　of　silicon.