Neil Bartlett Lectureship: The close and loose relationship between Carbon and Phosphorus
Seminar | February 8 | 4-5 p.m. | 120 Latimer Hall
Polyphosphorus units are an important class of compound and isolobal to carbon-based relatives. Because of the lone pairs at the phosphorus atoms, the five-fold symmetric cyclo-P5 ring of the pentaphosphaferrocenes [CpRFe(η5-P5)] enables the use of these complexes in unique supramolecular aggregations with Lewis acidic transition metal moieties to form unprecedented giant spherical molecules (Figure 1, left).1 Moreover, they represent sandwich complexes with a flexible redox2 and substitution behavior3 (Figure 1, right-top and center), different from the one of the carbon-based analogue ferrocene. The talk will compare similarities and differences between P- and C-based compounds and show some advantages of the former ones. Furthermore, the use of alternative reagents4 to synthesize such powerful starting materials of polypnictogen complexes and other surprising compounds will be presented.