摘要
由四核平面双帽［Ｍ４Ｅ２］型及单帽［Ｍ４Ｅ］型簇合物构型应满足的几何条件，得到判断有无Ｍ－Ｍ键存在的关系式Ｄ＝［０．９２（ＲＭ＋ＲＥ）］２－２Ｒ２Ｍ，并给出形成［Ｍ４Ｅ２］及［Ｍ４Ｅ］型簇合物时金属原子Ｍ和四重桥帽原子Ｅ点应满足的半径关系分别为ＲＥ≥１２ＲＭ和ＲＥ≥０．４１４ＲＭ。
The empirical formula for calculating the distance D between the quad bridging capping atom E and the plane consisting of metal atoms M, D =[0.92( R M+ R E)] 2-2 R 2 M, has been proposed, which can decide if there exists the metal metal bond by comparing D with experimental values d. The relationship between R M (metallic radii) and R E (covalent radii of quad bridging capping atom) to be satisfied in forming the tetranuclear planar clusters and are R E≥12 R M and R E≥ 0.414 R M, respectively.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1997年第1期112-114,共3页
Chinese Journal of Inorganic Chemistry
基金
陕西省自然科学基金
教委专项基金
