Synthesis, Structure, and Magnetic Properties of a Random Bimetallic One‐dimensional Co ^{IIII ‐Mn IIII Coordination Polymer with Mixed Azide‐carboxylate Bridges}

摘要

> The 3d–3d random bimetallic compound [Co _2.28 Mn _0.72 (N ₃ ) ₆ (mpc‐3) ₂ (CH ₃ OH) ₂ ] ( 1 ) (mpc‐3 = N ‐methylpyridinium‐3‐carboxylate) was synthesized by partly substituting the Co II ions in the homometallic compound by Mn II . Complex 1 was structurally and magnetically characterized. It consists of one‐dimensional chains with the neighboring metal ions being linked alternatively by [(μ‐EO‐N ₃ ) ₂ (μ‐COO)] (EO = end‐on) triple bridges and double EO azide bridges. Hydrogen‐bonding interactions and π–π interactions are involved in the formation of a three‐dimensional supramolecular network. Magnetic measurements revealed that complex 1 exhibits slow relaxation, which is similar to the homometallic Co II parent compound whereas the T _B is lower than that of the Co II analog.