complex 4a can be easily substituted by phosphine or phosphite ligands to give complexes [(OC)2(ON)Mo(μ-Br)(μ-S2CPCy3)Mo(CO)2(L)] (5a: L=PEt3; 5b: L = P(OMe)3). The single crystal X-ray diffraction study of 5a shows that the central carbon atom of the S2CPCy3 ligand is bonded to the molybdenum atom of the ‘Mo(CO)2(PEt3)’ fragment, which is expected to be electron-richer. With potentially bidentate phosphine
由[Mo(CO)3(NCMe)3 ]分三步制备了具有S 2 CPCy 3
配体[MoBr(NO)(CO)2(S 2 CPCy 3 ](3)的单核亚
硝酰基配合物: (i)用过量的NOBF 4进行亚硝基化;(ii)用Ph 4 PBr或Et 4 NBr加入
溴化物;以及(iii)用S 2 CPCy 3取代
配体。络合物3易于与[M(CO)3( NCR)3 ](M = Mo,R = Me; M = W,R = Et)得到双核亚
硝酰基配合物[(OC)2(ON)的Mo(μ-
溴)(μ-S 2 CPCy 3)M(CO)3 ](图4a,M =
钼;图4b,M = W)含η 2(S,S'); η 3(S,C,S') - S- 2 CPR 3和
溴化桥。从所述一个羰基
配体'的Mo(CO)3 '的双核复合五羰基的片段图4a可以通过膦容易地替换或
亚磷酸盐
配体以得到配合物[(OC)2(ON)的Mo(μ -Br)(μ-S 2 CPCy