New multinuclear zinc complexes with N4O2 coordination spheres

The preparation and characterisation of the new, potentially octadentate, ligand 1,2,4,5-tetrakis(3-(2-pyridyl)pyrazol-1-ylmethyl)benzene (L2) is reported. This and two related ligands, 1,2-bis(3-(2-pyridyl)pyrazol-1-ylmethyl)benzene (L1) and hexakis(3-(2-pyridyl)pyrazol-1-ylmethyl)benzene (L3) were reacted with zinc(II) acetate to give complexes in which pairs of ligand arms chelate to Zn(OAc) units. The X-ray crystal structures of [Zn(L1)(OAc)]PF6 and [Zn2(L2)(OAc)2](BPh4)2 are reported.