form the P(Cl)R group. Of the three diphospha[2]ferrocenophanes, (PtBu)2-bridged [2]ferrocenophane (10a) could be isolated as free diphosphine, while because of difficulty in their isolations as free ligands, the nBu and Ph analogs (10b and 10c, respectively) were characterized as bis(pentacarbonylmetal) complexes (μ-10b)-[W(CO)5]2 (11) and (μ-10c)-[Cr(CO)5]2 (12), in which the respective phosphorus
三个(PR)2桥联的[2]
二茂铁烯(R = t Bu(10a),n Bu(10b)和Ph(10c)),其中
二茂铁单元的两个C 5 H 4环与P桥接通过相应的[Fe C 5 H 4 P(Cl)R} 2 ]的
磷中心之间的
镁介导的还原偶联合成(III)-P (III)键。在P(CL)R组的[Fe C 5 ħ 4 P(Cl)的R} 2 ]从P(净推导2)2个基团的[Fe的C 5 ħ 4P(NEt 2)2 } 2 ]的过程如下:首先将P(NEt 2)2基团通过HCl转化为P(Cl)NEt 2,然后引入R(R = t Bu,n Bu和Ph)得到P(R)NEt 2,再次使其与HCl反应形成P(Cl)R基团。在三个二
磷[2]
二茂铁金属中,(P t Bu)2桥联的[2]
二茂铁金属(10a)可以作为游离
二膦被分离出来,而由于其作为游离
配体的分离困难,n Bu和Ph类似物(10b)和10c分别表征为双(五羰基
金属)络合物(μ-