catena‐Poly[copper(II)‐μ‐l‐tyrosyl‐l‐leucinato]

In the title compound, [Cu(C₁₅H₂₀N₂O₄)]_n, the copper(II) coordination is square planar. The anionic l ‐tyrosyl‐l ‐leucinate ligand binds in an N,N′,O‐tridentate mode to one Cu^II cation on one side and in an O‐monodentate mode to a second Cu^II cation on the other side, thus defining –Cu—O—C—O—Cu′– chains which run along the a axis. These chains are held together by a strong hydrogen bond involving the hydroxy H atom.