The sulfides can be prepared by direct reaction of the elements, and adopt the rock-saltstructure for all except Be, which has a sphalerite structure (Fig. 3.34). Beryllium carbide,Be2C, has an antifluorite structure formally containing Be2+ and C4− (methide) ions. Thecarbides of the other members of the group have the formula MC2 and contain the dicarbide (acetylide) anion, C ; 2 2− they react with water to generate ethyne, C2H2. The elementsfrom Mg to Ra react directly with nitrogen when heated to produce the nitrides, M2N3,which reacts with water to produce ammonia.
翻訳されて、しばらくお待ちください..