[PhTttBu]Co(CO)C(O)R when R = Me, Et, Ph. These five-coordinate, low-spin complexes possess square pyramidal stereochemistry with a thioether occupying the apical position. In contrast, [PhTttBu]Co(R), R = Bn or allyl, reacted with CO generating the brown cobalt(I) dicarbonyl [PhTttBu]Co(CO)2. The latter reaction is proposed to proceed via CO-promoted Co−C bond homolysis. The Ni complex [κ2-PhTttBu]Ni(η3-allyl) shows
                                    一系列电子和配位不饱和的四配位有机
钴(II)配合物,[PhTt tBu ] Co(R)([PhTt tBu ] =苯基三((叔丁基
硫代)甲基)
硼酸酯; R = Me,Et,Ph,Bn )是通过[PhTt tBu ] CoCl与相应的R 2 Mg试剂反应制得的。这些高自旋S = 3/2的配合物已通过光谱表征,其一些结构通过X射线衍射确定。在R =烯丙基衍
生物,[PhTt TBU ]的Co(η 3 -烯丙基),是低自旋。[PhTt tBu ] Co(R)与CO反应生成酰基加合物[PhTt tBu当R = Me,Et,Ph时]] Co(CO)C(O)R。这些五配位,低自旋的络合物具有方形锥体立体
化学,其中
硫醚占据顶端位置。相反,R = Bn或烯丙基的[PhTt tBu ] Co(R)与CO反应生成棕色的二
羰基钴(I)[PhTt tBu ] Co(CO)2。建议后者反应通过CO促进的Co-C键均质进行。
镍络合物[κ