巢式十一顶铂硼烷簇合物的合成与晶体结构

PtCl₂(PPh₃)₂]与B₁₀H₁₀^2－在异丙醇中回流反应, 得到3个巢式十一顶铂十硼烷簇合物: (PPh₃)₂PtB₁₀H₁₁-9-O-i-Pr] (1), (PPh₃)₂PtB₁₀H₁₀-8,10-(O-i-Pr)₂] (2)和(PPh₃)₂PtB₁₀H₁₁-8-O-i-Pr] (3). 簇合物1～3都具有PtB₁₀多面体骨架结构, 其中Pt原子位于敞开的PtB₄面上, 且与4个B原子成键, 每个Pt原子还与2个PPh₃基团中的P原子成键. 将溶剂热合成的方法引入到硼簇合物的合成中并进行同一反应, 得到2个B₁₀H₁₀^2－降解的巢式十一顶双铂九硼烷簇合物: (PPh₃)₂(μ-PPh₂)Pt₂B₉H₆-3,9,11-(O-i-Pr)₃] (4)和(PPh₃)₂(μ-PPh₂)Pt₂B₉H₆-3,9-(O-i-Pr)₂-11-Cl] (5). 簇合物4和5都具有Pt₂B₉多面体骨架结构, 2个Pt原子位于敞开的Pt₂B₃面上的相邻位置, 且由一个PPh₂基团桥连, 每个Pt原子还与3个B原子和一个PPh₃基团中的P原子成键. 通过红外光谱、元素分析、X射线单晶衍射对5个簇合物进行了结构表征.

Synthesis and Crystal Structure of the nido 11-Vertex Platinaborane Clusters

Three nido 11-vertex platinaundecaborane clusters: (PPh₃)₂PtB₁₀H₁₁-9-O-i-Pr] (1), (PPh₃)₂PtB₁₀H₁₀-8,10-(O-i-Pr)₂] (2) and (PPh₃)₂PtB₁₀H₁₁-8-O-i-Pr] (3) were obtained from the reaction of PtCl₂(PPh₃)₂] with (Et₄N)₂B₁₀H₁₀ in i-PrOH under reflux conditions. They all have a nido 11-vertex PtB₁₀ polyhedral skeleton, in which Pt atom lies on the open PtB₄ face. Each Pt atom was connected with four B atoms and two P atoms of PPh₃ ligand. Two novel B₁₀H₁₀^2－ deboronated nido 11-vertex diplatinaundecaboranes: (PPh₃)₂(μ-PPh₂)Pt₂B₉H₆-3,9,11-(O-i-Pr)₃] (4) and (PPh₃)₂(μ-PPh₂)Pt₂B₉H₆-3,9-(O-i-Pr)₂-11-Cl] (5) were obtained when the same reaction was carried out under solvothermal conditions. Cluster compounds 4 and 5 have a nido 11-vertex Pt₂B₉ polyhedral skeleton, in which two Pt atoms stay at neighbouring positions of the open Pt₂B₃ face and bridged by a PPh₂ ligand. Each Pt atom was connected with three B atoms and a P atom of PPh₃ ligand. They were characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction.