Cycloaddition reactions of a 1,2,4-triphosphacyclopenta-1,3-diene. Synthesis, crystal, and molecular structure of the novel hexaphosphorus cage compound P6C4But4H2 containing five directly bonded phosphorus atoms

Abstract

Protonation of the P₃C₂Bu^t₂H which dimerises by [4 + 2] and [2 + 2] cycloaddition reactions to the novel cage compound P₆C₄Bu^t₄H₂, the structure of which has been elucidated by ³¹P n.m.r. spectroscopy and a single crystal X-ray diffraction study.