Linkage Isomerism in Coordination Polymers

摘要: The use of the recently prepared polynitrile ligand tcnopr3OH– ([(NC)2CC(OCH2CH2CH2OH)C(CN)2]−) with different salts Fe(II), Co(II), and Ni(II) has led to a very rare example linkage isomerism in coordination chain. These pairs isomers can be formulated as [M(tcnopr3OH-κN,κO)2(H2O)2]; M = Fe (1), Co (3), Ni(5) [M(tcnopr3OH-κN,κN′)2(H2O)2]; (2), (4), Ni (6). Compounds 1–2, 3–4, 5–6 are three since they present same formula chain structure only differ connectivity bridging metal ions chain: through N an O atom (1κN:2κO-isomer) or two atoms (1κN:2κN′-isomer). magnetic properties show, expected, similar behaviors for both isomers.