Crystal structures and spectroscopic behavior of monomeric, dimeric and polymeric copper(II) chloroacetate adducts with isonicotinamide, N-methylnicotinamide and N,N-diethylnicotinamide

[Cu(X-salicylato)2(N,N-diethylnicotinamide)2(H2O)2] complexes: conformational polymorphism and its consequence in supramolecular hydrogen-bonding networks formation

“…The coordination of the dena ligand occurs via the pyridine ring nitrogen atom and the other possible donor atoms for coordination bonds are less preferred. There are 60 structures of metal complexes containing the dena moiety bonded to a metal atom via the pyridine nitrogen donor atom and only nine of those structures contain dena as a bridging ligand bonded to the metal atom by carbonyl oxygen donor atoms too [17][18][19][20][21][22][23][24][25]. The monodentate bonding mode of the dena ligand is even more dominant for carboxylatocopper(II) complexes and there are two main stoichiometries within this group of complexes with the dena ligand.…”

Structural and Magnetic Properties of Monomeric and Dimeric Copper(II) Complexes with Phenyl-N-[(pyridine-2-yl)methylene]methaneamide

“…This observation is caused from the equilibrium between the mononuclear and binuclear complexes in the solution. 5,20 The solution and powder EPR spectrum of Cu(ppmma)Br 2 at 77 K exhibited an isotropic broad singlet with the value of <g> ~ 2.0. Hatfield and co-workers 21 have shown that the singlettriplet exchange coupling J varies in a regular way with the quotient θ/R, where θ is the Cu-Cl-Cu' bridging angle and R is the length of the super exchange pathway (R).…”

New Solvatomorph of Tetrakis(Μ2-Acetato-O,O')-Bis(Isonicotinamide-N)-Di-Copper(II): Synthesis, IR, TGA and X-Ray Study

“…The retrieval of Cambridge Structural Database (CSD) revealed that the combination of Cu(II) with isonicotinamide resulted in structural diversity, including mono- [13][14][15], binuclear [14,[16][17][18], 1D [7,16,[19][20][21] and 2D polymeric arrays [7,22,23]. In all studies isonicotinamide coordinates to the copper(II) ion in a monodentate form through the pyridine N atom or in a bidentate one [16] thus providing possibilities for polymeric coordination networks.…”

“…In all studies isonicotinamide coordinates to the copper(II) ion in a monodentate form through the pyridine N atom or in a bidentate one [16] thus providing possibilities for polymeric coordination networks. Pyridine-2,5-dicarboxylic acid combines the advantages of both organic multicarboxylic acids and heteroaromatic compounds and displays versatile coordination modes through its one N atom and four carboxylate O atoms, which in alliance with Cu(II) leads to the formation of coordination homometallic [23][24][25][26][27] and/or heterometallic [26,[28][29][30] polymers.…”

“…Copper(II) metal-organic frameworks are of considerable interest because of their structural and photoluminescent biological function, catalytic and magnetic properties [8][9][10][11]. Isonicotinamide and its related compounds are reported to represent a group of small molecules as a drug candidate to prevent and/or reverse diabetes by protecting β-cells from damage and death [12].The retrieval of Cambridge Structural Database (CSD) revealed that the combination of Cu(II) with isonicotinamide resulted in structural diversity, including mono- [13][14][15], binuclear [14,[16][17][18], 1D [7,16,[19][20][21] and 2D polymeric arrays [7,22,23]. In all studies isonicotinamide coordinates to the copper(II) ion in a monodentate form through the pyridine N atom or in a bidentate one [16] thus providing possibilities for polymeric coordination networks.…”