A cobalt(ii) chain based on pymca generated in situ from the hydrolysis of 2-cyanopyrimidine: spin canting and magnetic relaxation.

A one-dimensional (1D) coordination polymer, [{Co 2 (pymca) 2 ·(H 2 O) 4 }SO 4 ·2H 2 O] n (1) (pymca = 2-carboxypyrimidine), was solvothermally synthesized via the reaction of 2-cyanopyrimidine and Co(SCN) 2 . A bidentate pymca ligand was formed in situ by the hydrolysis of 2-cyanopyrimidine. Furthermore, in this study, the magnetic properties of complex 1 were investigated in detail. The results indicated that complex 1 showed a single-chain magnet (SCM) behavior below ca. 3 K. The energy barrier (Δ τ 1 / k B ) and preexponential factor ( τ 0 ) of SCM were 31.2 K and 5.4 × 10 -9 s, respectively.