Mixed Phosphatetrahedranes

P‐yramids : Tetrahedranes are highly strained molecules, and the all‐carbon (C t Bu) 4 and all‐phosphorus species P 4 have been known for decades and centuries, respectively. Despite this, the mixed P/C tetrahedranes were unknown until recently when the syntheses of the phosphatetrahedranes P(C t Bu) 3 and P 2 (C t Bu) 2 were reported by the research groups of Cummins and Wolf.