Structural features of a new [Fe(nicotinamide)2(H2O)4]·[Fe(H2O)6]·(SO4)2·2H2O complex

Abstract

A new nicotinamide complex of Fe(II) cation was prepared by reaction between ferrous sulfate and nicotinamide in aqueous solution. The complex was characterized on the basis of elemental analysis, FT IR and UV−VIS spectroscopy, electrochemistry (cyclic voltammetry) and X−ray crystallography. The complex consists of the molecular composition of [Fe(nicotinamide)

Stability of H‐complexes of nicotinamide nitrogen heteroatom with water and ethanol in mixed solvents by 13C NMR probing

“…The data on the donor center solvation determined separately from a molecule are important for essential explanation of the regularities in thermodynamic functions changes of nicotinamide complexation with several d-metal ions in binary solvents because nicotinamide forms the complexes with the cations by a nitrogen heteroatom. [7,8]…”

“…[2][3][4][5][6] A nicotinamide molecule is known to form 1 : 1 coordination compounds donating a lone electron pair of nitrogen heteroatom towards a cation. [7,8] The nitrogen heteroatom can be an acceptor of the only hydrogen bond when nicotinamide is dissolved in a protonic solvent. Therefore, the specific solvation of this atom in different media can influence greatly the complexes stability.…”

Dilution Enthalpies and Enthalpic Pairwise Self-Interactions of Nicotinamide and Isonicotinamide in (Dimethylformamide + Water) and (Dimethyl Sulfoxide + Water) Mixed Solvents at 298.15 K

“…As we all know, amide compounds have a very important position in biology and chemistry. Nicotinamide (NA) is the derivative of vitamin B3, serving as an important functional group of coenzymes NAD + and NADP + . , NAD + , NADP + , and their reduced state molecules (NADH, NADPH) are widespread in the biological redox systems. − In addition to the direct interest in biology, − researches on NA and its derivatives or isomers (e.g., isonicotinamide (INA)) focused on electrochemistry, coordination chemistry, structural chemistry, , pharmacology, , and molecular interaction thermodynamics in solutions. − Because of the structural and biochemical importance of combination between pyridine-ring and carboxamide moieties (Scheme ), investigations on NA, INA, and its derivatives or analogues are ongoing. − …”