Selective adenine/cytosine cations in one-dimensional coordination polymers of manganese (II) and copper (II) 2,3-pyridinedicarboxylates

One-dimensional coordination polymer {[1H,9H-ade](2)[MnL2]center dot 4H(2)O}(n) (1) and {[1H,3H-cyt](2)[CuL2]center dot 6H(2)O}(n) (2) (ade = adenine, cyt = cytosine, L = dianion of 2,3-pyridinedicarboxylic acid) are selectively synthesized and variable-temperature magnetic susceptibility measurements revealed weak antiferromagnetic interactions within the chains of 1 and 2 (J = 0.29 cm(-1) for 1 and J = -0.03 cm(-1) for 2, according to the -2J(ij)S(i)S(j) HDvV Hamiltonian formalism). (C) 2010 Elsevier B.V. All rights reserved.