Coordination Flexibility of the Bis[(di‐ <i>tert</i> ‐ Butylphosphino)methyl]aminophosphane Ligand: Synthesis, Characterization, and Theoretical Insights

Complexation modes of bis[(di‐ tert ‐butylphosphino)methyl]aminophosphane containing PCPCP structural motif is investigated. The donor ability of each phosphane unit is determined by theoretical calculations and experimentally. Reactions of this ligand with cobalt and iron carbonyl precursors yielded various complexes, with different coordination modes. The three phosphorus donor atoms, connected via methylene bridges, allow for flexible coordination behavior, indeed mono‐, di‐ and tricoordinated complexes are isolated. Single‐crystal X‐ray diffraction and spectroscopic analysis confirmed the structural diversity of the resulting compounds.