CRYSTAL STRUCTURE OF A NOVEL COMPLEX [Co(3,3?-bpbc)(H2O)3]?H2O

2 2?-bipyridine-3 3?-dicarboxylic acid (3 3?-bpbc) cobalt(II) complex crystal structure coordination

КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА СОЛЕЙ АНИОНА транс-[Rh(NH3)2(NO2)4]– С КАТИОНАМИ K+, Cs+, Ag+ И (CH3)4N+, УСЛОВИЯ ФОРМИРОВАНИЯ МАГНИТОУПОРЯДОЧЕННОЙ ФАЗЫ εe-Fe2O3.ИССЛЕДОВАНИЕ МЕТОДОМ ФМР IN SITU, ...

The crystal structure of the complex is determined by single crystal X-ray diffraction. <...> In the crystal, the cobalt(II) ion adopts a hexa-coordinate environment, and the structure units aggregate together to give birth to infinite 1D chains. <...> The 2D and 3D framework is constructed via intermolecular hydrogen bonds. <...> Keywords: 2,2-bipyridine-3,3-dicarboxylic acid (3,3-bpbc), cobalt(II) complex, crystal structure, coordination During the past decades, metal complexes containing hydrogen bonded water clusters have received a wide range of attention in the field of supramolecular chemistry and crystal engineering [ 1— 5 ]. <...> Due to its strength and directionality the hydrogen bond is perhaps the most important intermolecular interaction used in such endeavors. <...> In this paper, we successfully designed the 2,2-bipyridine-3,3-dicarboxylic acid (3,3-bpbc) ligand that consists of two carboxylate goups and aromatic ring systems, and its noncovalent linking sites lead to the aggregation of the neighboring complexes through hydrogen bonds and form a novel complex [Co(3,3-bpbc)(H2O)3]ŒH2O. <...> In the unit cell, 3,3-bpbc binds to the cobalt atom in a chelate mode by two N atoms. <...> Several days later, pink transparent crystals formed by evaporating the solution at room temperature were collected and found suitable for X-ray diffraction. <...> The crystal structure of complex I was determined by X-ray singe crystal diffraction. <...> All non-hydrogen atoms were refined with anisotropic thermal parameters; hydrogen atoms bound to carbon atoms were placed in calculated positions and refined isotropically with a riding model [ 22 ]. <...> The crystal data and structure refinement are given in Table 1; selected bond distances (Е) and bond angles (deg.) are listed in Table 2. <...> Compound I possesses an asymmetric unit consisting of one Co atom, one 3,3-bpbc molecule, three dissociative water molecules, and one crystallization water molecule. <...> An X-ray single crystal analysis revealed that the Co atom allows the formation of a hexa-coordinate environment with one carboxylate oxygen atom O(3), two nitrogen atoms N(1), N(2) from 3,3-bpbc, and three oxygen atoms O(5), O(6), and O(7) from coordinated <...>

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