Die hypothetischen Phosphor–Cluster P₆ und P₈ – welche Isomeren wären die stabilsten?

The Hypothetic Phosphorus Clusters P 6 and P 8 – Which Isomers Would Be the Most Stable Ones? The hexaphosphabenzvalene 3 turned out to be the most stable P 6 isomer applying ab initio MP4(SDQ)/CEP–DZ * calculations, and therefore plays a favorite role for synthesis. The cubic P 8 is replaced by a polycyclic structure 8 which is more stable by 49 kcal mol ‐1 , but still thermodynamically unstable with respect to 2 P 4 .