The reactions of triphenylphosphine with the azido-ortho-closo-dicarbadodecaboranes 1-N3-2-R-closo-1,2-C2B10H10 [R = Me (1a), Ph (1b)] produce the stable and isolatable carboranyl phosphazides 1-(N3PPh3)-2-R-closo-1,2-C2B10H10 [R = Me (2a), Ph (2b)] in good yields. Single crystal X-ray diffraction analysis revealed that, in the solid state, phosphazide 2a adopts an unusual s-cis conformation, whereas 2b adopts an s-trans conformation.
三苯基膦与
叠氮邻-闭式-二
碳十
硼烷1-N3-2-R-闭式-1,2-C2B10H10[R = Me(1a),Ph(1b)]的反应,以良好产率生成了稳定且可分离的
碳硼烷基膦
氮化合物1-(N3PPh3)-2-R-闭式-1,2-C2B10H10[R = Me(2a),Ph(2b)]。单晶X射线衍射分析显示,在固态下,膦
氮化合物2a采取了一种不寻常的s-顺式构型,而2b则采取s-反式构型。