Two unique six-connected self-penetrating coordination polymers with a new (4(4).6(10).8) network topology, derived from the cross-linking of two 6(6)-dia subnets, were constructed from Ni(II) or Co(II) and two types of V-shaped tectons. The Ni(II) complex 1 shows an antiferromagnetic coupling via μ-carboxylate and μ-H(2)O pathways, whereas the Co(II) complex 2 exhibits the single-ion behavior in 300-34 K and then a ferromagnetic coupling at lower temperatures.