([(o-(R2P)C6H4)2SbCl2]PtCl (R = Ph, iPr)) with 3 equiv of AgOTf. The crystal structures of 2 and 4 confirmed that the chloride ligands have been fully substituted by more labile triflate ligands. Despite structural similarities in the dinuclear cores of 2 and 4, only 2 acts as a potent carbophilic catalyst in enyne cyclization reactions. The high activity of 2 is also reflected by its ability to promote
                                    与显影电后过渡
金属催化剂的视图,我们现在已合成[(ø - (PH 2 P)C ^ 6 ħ 4)2的Sb(OTF)2 ]的Pt(OTF)(2)和[(ø - (i Pr 2 P)C 6 H 4)2 Sb(OTf)2 ] Pt(OTf)(4)通过处理相应的三
氯化物([(o-(R 2 P)C 6 H 4)2 SbCl 2 ] PtCl(R = Ph,iPr))与3当量的AgOTf。2和4的晶体结构证实
氯化物
配体已被更不稳定的
三氟甲磺酸酯
配体完全取代。尽管2和4的双核核心在结构上相似,但只有2个在烯炔环化反应中充当有效的嗜碳催化剂。的高活性2也通过其促进加成
吡咯和
噻吩衍
生物,以炔能力反射。结构和计算分析表明2的出色反应性来自有利的空间效应和电子效应。最后比较2使用先前报道的自活化催化剂[(o-(Ph 2 P)C 6 H 4)2 Sb(OTf)2 ] PtCl强调了
三氟甲磺酸盐对
氯取代的好处。