The First Coordination Polymers Based on 1,3-Diphosphaferrocenes and 1,1′,2,3′,4-Pentaphosphaferrocenes

Abstract

Phosphaferrocenes in combination with coinage metal salts proved to be excellent building blocks in supramolecular chemistry for the buildup of oligomeric and polymeric assemblies. The synthesis of a series of novel phosphaferrocenes containing the 1,3-P2C3iPr3 and/or the 1,2,4-P3C2iPr2 ligand is described herein. The self-assembly processes of the 1,3-diphospha-, 1,2,4-triphospha-, and 1,1′,2,3′,4-pentaphosphaferrocenes with CuI halides led to the formation of 1D or 2D polymers. With [Cp∗Fe(η5-P2C3iPr3)] (Cp∗ = η5-C5Me5), infinite chains are formed, whereas with [(η5-P3C2iPr2)Fe(η5-P2C3iPr3)] 1D ladderlike structures are obtained. These are the first polymers containing such a di-and pentaphosphaferrocene, respectively. On the other hand, the use of [Cp∗Fe(η5-P3C2iPr2)] leads to the construction of 2D networks with intact sandwich complexes, which is uncommon for this class of complexes.