Coordination polymers based on square planar Co(II) node and linear spacer: solvent-dependent pseudo-polymorphism and an unprecedented interpenetrating structure containing both 2D and 3D topological isomers

Reaction of Co(NCS)(2) with 1-methyl-1A-(4-pyridyl)2-(4-pyrimidyl)ethylene (mppe) in different solvents yields two kinds of novel coordination polymer structures of [Co(mppe)(2)( NCS)(2)](n): one of them shows an unprecedented interpenetrating structure with both 2D and 3D topological isomers.close797