Access to catenated and branched polyphosphorus ligands and coordination complexes via a tri(pyrazolyl)phosphane

We report a convenient and smooth protocol for the high-yielding synthesis of a triphosphane and an iso-tetraphosphane from a readily accessible tri(pyrazolyl)phosphane. The products are obtained from a one-pot reaction at room temperature and form complexes with the Fe(CO)(4)-fragment.