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Reactions of differing simple cobalt salts with 4,4'-bipyridine resulted in several new one-dimensional coordination polymers. Linear chain structures formed by coordination of pyrazine and 4,4'-bipy to metal centers can be expanded to form 2D and/or 3D polymers via other connections. The double chain structure of Cu(C(sub8)H(sub6)N(sub2))C1(sub2) is viewed as a limited extension of a single-chain polymer.

The Co(NCS)2 coordination polymers such as Co(NCS)2(pyz)2, Co(NCS)2(H2O)(4,4'-bipy).4,4'-bipy and Co(NCS)2(4,4'-bipy)2.2(CH3CH2)2O were synthesized by the reaction of Co(NCS)2 with pyrazine and 4,4'-bipyridine. The two-dimensional coordination polymers are composed of six-membered rings of metal ions that are connected by pyrazine ligands that do not form an interpenetrated structure. The structure of the polymer is also dependent on solvent coordination and inclusion during the synthetic process.