Pan, Zi-Cai et al. published their research in Acta Crystallographica in 2008 | CAS: 53118-43-7

N1,N2-Di(pyridin-4-yl)oxalamide (cas: 53118-43-7) belongs to amides. In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Thus amides can participate in hydrogen bonding with water and other protic solvents; the oxygen atom can accept hydrogen bonds from water and the N–H hydrogen atoms can donate H-bonds. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.Product Details of 53118-43-7

Bis(4-aminopyridinium) bis(oxalato-κ2O,O’)cuprate(II) dihydrate was written by Pan, Zi-Cai;Zhang, Kou-Lin;Ng, Seik Weng. And the article was included in Acta Crystallographica in 2008.Product Details of 53118-43-7 The following contents are mentioned in the article:

The CuII atom in bis(4-aminopyridinium) bis(oxalato-κ2O,O’)cuprate(2-) dihydrate, (C5H7N2)2[Cu(C2O4)2]·2H2O, is located on a center of inversion and is chelated by 2 oxalate groups in a square-planar coordination geometry. The cation, anion and H2O mols. interact through H bonds, forming a 3-dimensional H-bonded network. This study involved multiple reactions and reactants, such as N1,N2-Di(pyridin-4-yl)oxalamide (cas: 53118-43-7Product Details of 53118-43-7).

N1,N2-Di(pyridin-4-yl)oxalamide (cas: 53118-43-7) belongs to amides. In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Thus amides can participate in hydrogen bonding with water and other protic solvents; the oxygen atom can accept hydrogen bonds from water and the N–H hydrogen atoms can donate H-bonds. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.Product Details of 53118-43-7

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics