Résumé/Abstract The reactivity of 1-(9-fluorenyl) germatrane (I) containing several reaction centers (the Ge-C apical bond, Ge-O equatorial bonds, mobile hydrogen atom in the 9- position of the fluorenyl group, and aromatic rings) is studied. Its interaction with reagents that could involve each of the centers is investigated. The reactivities of I and 9- trimethylgermylfluorene (II), a fluorenyl derivative of tetracoordinated germanium, are ...