Bifunctional aminophosphanes (Et2N)2P(CH2)nP(NEt2)2 and (Et2N)2PP(NEt2)2 as ligands in metal(O) carbonyl complexes of Cr, Mo and W
作者:Klaus Diemert、Wilhelm Kuchen、Jürgen Kutter
DOI:10.1016/s0022-328x(00)86842-4
日期:1982.10
aminophosphanes (Et2N)2P(CH2)n-P(NEt2)2 (LL) have been shown to form either mononuclear complexes (CO)4M cis-(LL) (M = Cr, n = 1–4; M = Mo, W, n = 4) or binuclear compounds [(CO)4M(LL)]2 (M = Cr, n = 5–10) with ligand bridges in trans-positions. By suitable choice of reaction conditions, (CO)5M(LL)M(CO)5 (M = Cr, Mo, W, n = 4) containing only one ligand bridge can also be obtained. In the former compounds complete
取决于n的值,已显示双官能氨基膦(Et 2 N)2 P(CH 2)n -P(NEt 2)2(LL)形成单核络合物(CO)4 M顺式-(L L)(M = Cr,n = 1-4; M = Mo,W,n = 4)或双核化合物[(CO)4 M(LL)] 2(M = Cr,n = 5-10 )具有在转位中的配体桥。通过反应条件,(CO)适当选择5 M(LL)M(CO)5(M =铬,钼,钨,Ñ= 4)也可以得到仅包含一个配体桥的基团。在前一种化合物中,氨基被HBr完全或部分取代,得到(CO)4 M顺式-[Br 2 P(CH 2)4 PBr 2 ](M = Cr,Mo)和(CO)分别为4 W顺式-[Et 2 N(Br)P(CH 2)4 P(Br)NEt 2 ]。通过相同的方法(CO)5 CrBr 2 PPBr 2 Cr(CO)5,其中P 2 Br 4由(CO)5 Cr(Et 2 N)2 PP(NEt