Synthesis, crystal structure and thermal properties of the dinuclear complex bis( μ -4-methylpyridine N-oxide- κ 2O:O)bis[(methanol- κ O)(4-methylpyridine N-oxide- κ O)bis(thiocyanato- κ N)cobalt(II)]

Reaction of Co(NCS)2 with 4-methylpyridine N-oxide in methanol leads to the formation of crystals of the title compound, [Co2(NCS)4(C6H7NO)4(CH4O)2] or Co2(NCS)4(4-methylpyridine N-oxide)4(methanol)2. The asymmetric unit consist of one CoII cation, two thiocyanate anions, two 4-methylpyridine N-oxide coligands and one methanol molecule in general positions. The H atoms of one of the methyl groups are disordered and were refined using a split model. The CoII cations octahedrally coordinate two terminal N-bonded thiocyanate anions, three 4-methylpyridine N-oxide coligands and one methanol molecule. Each two CoII cations are linked by pairs of μ -1,1(O,O)-bridging 4-methylpyridine N-oxide coligands into dinuclear units that are located on centers of inversion. Powder X-ray diffraction (PXRD) investigations prove that the title compound is contaminated with a small amount of Co(NCS)2(4-methylpyridine N-oxide)3. Thermogravimetric investigations reveal that the methanol molecules are removed in the beginning, leading to a compound with the composition Co(NCS)2(4-methylpyridine N-oxide), which has been reported in the literature and which is of poor crystallinity.

Source: Acta Crystallographica Section E - April 18, 2024 Category: Chemistry Authors: N ä ther, C. Jess, I. Tags: synthesis crystal structure thermal properties cobalt thiocyanate coordination compound 4-methylpyridine N-oxide research communications Source Type: research