A facile synthesis of Sn O2/corncob-derived activated carbon(CAC) composite was proposed,and the CAC used here has high specific surface area(over 3000 m2/g) an
X2Si=Ge:(X = H, Me, F, Cl, Br, Ph, Ar···) is a new species. Its cycloaddition reaction is a new area for the study of germylene chemistry. The mechanism of c