Metal-dependent dimensionality in divalent metal coordination polymers containing diphenate and bis(4-pyridylformyl)piperazine ligands

• 2-D and 3-D divalent metal diphenate coordination polymers.
• Long-spanning bis(4-pyridylformyl)piperazine (4-bpfp) coligands.
• Copper derivative has 2-fold parallel interpenetrated (4,4) grid layers.
• Cobalt derivative has ferromagnetic {Co(OCO)2}n chains, linked into 3-D.

Hydrothermal synthesis has afforded a pair of paramagnetic divalent metal diphenate coordination polymers containing long-spanning bis(4-pyridylformyl)piperazine (4-bpfp) ligands. Single-crystal X-ray diffraction revealed an important structure directing role on the part of the metal coordination environment. [Cu(diphenate)(4-bpfp)]n (1, diphenate = biphenyl-2,2′-dicarboxylate) shows a system of 2-fold parallel interpenetrated (4,4) grid coordination polymer layers. {[Co(diphenate)(4-bpfp)]·2H2O}n (2) possesses anti-syn bridged {Co(OCO)2}n infinite 1-D chains, linked into a non-interpenetrated 66 3-D diamondoid net. A variable temperature magnetic susceptibility study of 2 indicates the presence of weak ferromagnetic coupling, concomitant with single-ion effects. Thermal properties of these materials are also discussed.

Hydrothermal synthesis has afforded diphenate coordination polymers containing bis(4-pyridylformyl)piperazine (4-bpfp) ligands. {[Co(diphenate)(4-bpfp)]·2H2O}n (2) possesses anti-syn bridged ferromagnetic {Co(OCO)2}n chains linked into a diamondoid net.Figure optionsDownload as PowerPoint slide