COPPER(II)-TEMPLATED ASSEMBLY OF TETRANUCLEAR GRID-LIKE COMPLEXES FROM SIMPLE PYRIDINE-PYRAZOLE LIGANDS

Reaction of Cu(O(2)CMe)(2) . H2O with HL(1) [3-(2-pyridyl)pyrazole] or HL(2) [6-(3-pyrazolyl)-2,2'-bipyridine] and NH4PF6 followed by crysta llisation of the crude products from dmf-ether affords [Cu(4)L(6)(1)(d mf)(2)][PF6](2) 1 and [Cu(4)L(4)(2)(dmf)(4)][PF6](4) 2 respectively, i n which the deprotonated pyrazolyl groups act as bridging ligands and the 2 x 2 grid-like architectures are a result of the preference of th e Cu-II ions for elongated square-pyramidal coordination geometries.