Two new interpenetrating networks assembled from 5-methylisophthalic acid and bipyridyl ligand with copper(II) salts

Hydrothermal reaction of copper(II) salt with mixed ligands afford two new coordination polymers formulated as [Cu(mip)(bpmp)0.5]·H2O (1) and [Cu(mip)(bpe)0.5] (2) (H2mip = 5-methylisophthalic acid, bpmp = N,N′-bis-(4-pyridyl-methyl) piperazine, bpe = 1,2-bis-(4-pyridyl) ethane). X-ray diffraction analyses show that both 1 and 2 are 3D doubly interpenetrating networks based on α-Po primitive cubic units.