Abstract
The one-dimensional helical chain-like coordination polymer [Co(bpdc)(H2O)3]・H2O (1) has been synthesized by hydrothermal reaction of pdon with Co(NO3)2・6H2O and Na2B4O7 (bpdc = 2,2ʹ-bipyridyl-3,3ʹ-dicarboxylate, pdon = 1,10-phenanthroline-5,6-dione). 1 crystallizes in the monoclinic space group P21/n with the cell parameters: a = 9.987(1), b = 9.238(1), c = 16.080(2) Å, β = 97.471(1)°, V = 1471.0(3) Å3, Z = 4. The bpdc ligand has resulted from an in situ carbon-carbon bond cleavage in the pdon ligand. The Co(II) atom is surrounded by two nitrogen atoms of the bpdc pyridyl groups and four O atoms, of which three belong to coordinated water molecules and one to a bpdc carboxylate group. The six-coordinated Co(II) atom adopts a distorted octahedral geometry. Compound 1 displays antiferromagnetic interactions. Above 30 K, χm −1 obeys the Curie- Weiss law with C = 3.12 cm3 K mol−1 andΘ = −10.6 K.
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