synthesis, characterization and x-ray crystal structure of a cobalt(iii) complex with 2-bis(pyridine-2-carboxamido)-4,5-dimethylbenzene ligand

نویسندگان

soraia meghdadi

isfahan university of technology kurt mereiter

vienna university of technology, austria narges shams mohammadi

isfahan university of technology ahmad amiri

department of chemistry, university of tehran

چکیده

an octahedral cobalt(iii) complex, trans-[(me2bpb)co(bzlan)2]clo4 (1), with h2me2bpb = n,n’-(4,5-dimethyl-1,2-phenylene)dipicolinamide and bzlan = benzylamine, has been synthesized and characterized by elemental analyses, ir, uv-vis, and 1h nmr spectroscopy. the structure of this complex has been determined by x-ray crystallography. the me2bpb2– is a di-anionic tetradentate ligand furnishing a n4 set, such that two n atoms of the two pyridine rings and two amido n atoms occupy four equatorial positions. the two benzylamine ligands occupy the two axial positions leading to a distorted octahedral geometry around the central cobalt ion. the electrochemical behavior of this complex in acetonitrile solution indicates that the irreversible oxidation of 4,5-dimethylorthophenylene moiety and reduction of pyridine rings of the free ligand appear as reversible waves in the cyclic voltammogram of its cobalt(iii) complex. concomitant coiii/coii redox process and solvolysis in acetonitrile solution is observed. this irreversible redox process becomes reversible in the presence of excess benzylamine.

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Synthesis, Characterization and X-Ray Crystal Structure of a Cobalt(III) Complex with 2-Bis(pyridine-2-carboxamido)-4,5-dimethylbenzene Ligand

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عنوان ژورنال:
inorganic chemistry research

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