The construction of supramolecular structures by self-assembly of metal complexes and linkers has attracted a broad interest during the last decade. Tetradendate ligands like salen derivatives, phthlocyanines or porphyrins, which are able to block the equatorial positions of octahedral metals, have been used for the preparation of 1D structures. In this communication, we will report the use of phosphinic acids as linkers for the construction of 1D polymeric chains by self-assembling manganese (III) complexes of salen ligands. Depending on the nature of the salen ligand and the phosphinate derivatives, monomeric, dimeric or polymeric structures have been obtained. The magnetic properties of these compounds will be reported.