含硫过渡金属基元的反应——Ⅱ.双膦及双齿巯基混合配位钴,镍化合物的合成和结构特征

Transition Metal Thiolato Complexes as Synthons Ⅱ. Syntheses and Structural Characteristics of Bidentate Phosphine and Bidentate Thiolato Complexes of Cobalt and Nickel

双膦(P(?)P)和1,2-双齿巯基(S(?)X)混合与MCl_2(M=Co,Ni)反应,得到通式为M(S(?)X)(P(?)P)的产物.晶体结构测定表明,配合物Co(bdt)(dppe)(1),Ni(tdt)(dppm)(2)和Ni(tsal)(dppe)(3)中的金属均为SXP_2配位的四方平面构型,S,X,P原子分别来自二种双齿配体,各形成四、五或六元螯合配位环.文中总结了结构特征,探讨了基元配合物稳定的原因.

Mononuclear complexes Co(bdt)(dppe)(1),Ni(tdt)(dppm)(2),and Ni(tsal)(dppe)(3)containingboth bidentate phosphine (P^P) and bidentate thiolato (S^X,X=S,O) ligands were synthesized and structurally characterized. The metal centers are all square planar in geometry composed of SXP2 from the two ligands forming four - , five - , or six - membered chelate rings. Structural characteristics of the complexes are summarized and the resistance of these complexes to the construction into polynuclear cluster compounds is discussed.