First report on N,N'-diisoalkylisonicotinamide 1D coordination network containing linear trinuclear [Co3L4Cl6] units with mixed Co(II)(Td)-Co(II)(Oh)-Co(II)(Td) geometries: structure and magnetic properties

Dalton Transactions : an International Journal of Inorganic Chemistry
Pratibha KapoorManinder Singh Hundal

Abstract

Reaction of anhydrous CoCl(2) with N,N'-diisopropylisonicotinamide (L) has yielded a coordination polymer containing linear trinuclear [Co(3)L(4)Cl(6)] units with a rare, mixed Co(T(d))-Co(O(h))-Co(T(d)) assembly (compound 1). The central Co(II) ion, of each trinuclear entity, exhibits a distorted octahedral geometry, with two ligand molecules coordinating through their carbonyl oxygen atoms along with two bridging Cl(-) ions and two pyridine N atoms from the neighboring molecules. Also, in each unit, two outer Co(II) ions display distorted tetrahedral geometry, coordinating to one ligand molecule through the pyridine N atom and to three Cl(-) ions (one of them bridged to the central Co(II) and the two acting as a terminal ligands). The magnetic properties of this compound were investigated in the temperature range of 2.0 to 300.0 K. Owing to the complexity of the system and the weak interactions among trinuclear aggregates, the magnetic response has been analyzed using a model which considers these units as isolated systems. In addition, magnetic data has been examined in two separated blocks, above and below 50 K, applying programs VPMAG FORTRAN and MAGPACK-fit, respectively. This way, only the most significant effects at eac...Continue Reading

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Citations

Apr 29, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Dong-Rong XiaoMing-Liang Tong
Oct 12, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Ajay Pal Singh PannuManinder Singh Hundal
Nov 22, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuan-Zhu ZhangOsamu Sato

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