《How Robust Is the N-H···Cl2-Cu Synthon? Crystal Structures of Some Perchlorocuprates》 was written by Kumar, D. Krishna; Ballabh, Amar; Jose, D. Amilan; Dastidar, Parthasarathi; Das, Amitava. Computed Properties of C11H9N3O And the article was included in Crystal Growth & Design on April 30 ,2005. The article conveys some information:
Perchlorocuprate salts, namely, [4,4′-H2diazastilbene][CuCl4] 1, [H2-N-(4-pyridyl)isonicotinamide][CuCl4] 2, [H2-N-(3-pyridyl)isonicotinamide][CuCl4] 3, [H2-N-(4-pyridyl)nicotinamide][CuCl4] 4, [H2-N,N’-bis(4-pyridyl)urea][CuCl4] 5, [H-isonicotinic acid]2[CuCl4].2H2O 6, [2-aminopyridinium]2[CuCl4] 7, and [3-aminopyridinium]2[CuCl4] 8 were synthesized and analyzed by single-crystal x-ray diffraction. N-H···Cl-Cu H-bonding interaction is important in supramol. syntheses of these solids. However, occurrence of bifurcated H bonding N-H···Cl2Cu (synthon A) appears to be dependent on the topol. of the cations, geometry of the anions, and other weak interactions such as C-H···Cl-Cu. Salts of isomeric cations such as 2, 3 and 4, and 7 and 8 are crystallog. isostructural in their resp. groups despite having different H-bonding site topologies. The H-bonding-capable backbones (amide and urea moieties) in 2, 3, 4, and 5 do not display the typical H-bonding network involving these moieties. In the experiment, the researchers used N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3Computed Properties of C11H9N3O)
N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors.Computed Properties of C11H9N3O In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well.
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics