Naslov
Uncommon isonicotinamide supramolecular synthons in copper(II) complexes directed by nitrate and perchlorate anions

Autori
Đaković, Marijana ; Popović, Zora

Izvornik
Acta Crystallographica Section C - Crystal Structure Communications (0108-2701) C65 (2009), 9; M361-m366

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Cu(II) complexes with isonicotinamide; supramolecular synthons

Sažetak
The title compounds, trans-diaquabis(nitrato-O)bis(pyridine- 4-carboxamide-N)copper(II), [Cu(NO3)2(C6H6N2O)2- (H2O)2], (I), and trans-diaquatetrakis(pyridine-4-carboxamide- N)copper(II) bis(perchlorate), [Cu(C6H6N2O)4(H2O)2]- (ClO4)2, (II), are composed of mononuclear coordination entities involving Cu(II) ions and isonicotinamide. In (I), the centrosymmetric tetragonally distorted octahedral copper(II) environment contains trans-related isonicotinamide and water molecules in the equatorial plane and two nitrate ions occupying the axial sites. In (II), the equatorial plane of the C2-symmetric distorted octahedron is built up of four isonicotinamide ligands, while water molecules occupy the axial positions. The complex molecules of (I) and (II) are linked into three-dimensional supramolecular frameworks by O— H...O and N— H...O hydrogen bonds. The nitrate and perchlorate ions are building blocks that disturb the robust R2 2(8) amide supramolecular motif commonly found in crystal structures of copper– isonicotinamide complexes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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