The author of 《Different Metal Aggregation in Copper Acetate Chain Coordination Polymers with Dipyridyl Tethers Bearing Hydrogen Bonding Capable Functional Groups》 were Uebler, Jacob W.; Stone, Brandon S.; LaDuca, Robert L.. And the article was published in Zeitschrift fuer Anorganische und Allgemeine Chemie in 2013. Recommanded Product: N-(Pyridin-4-yl)isonicotinamide The author mentioned the following in the article:
Hydrothermal synthesis has afforded a pair of divalent copper acetate coordination polymers containing either 4,4′-dipyridylamine (dpa) or 4-pyridylisonicotinamide (4-pina), both of which have H-bonding-capable central functional groups. X-ray crystallog. revealed that both exhibit a 1-dimensional chain structure. Use of the kinked tethering ligand dpa produced [Cu(OAc)2(dpa)]n (1), which possesses a simple chain based on dpa linkage of isolated Cu ions. However, employing the straighter amide ligand 4-pina generated {[Cu(OAc)2(4-pina)]·0.5H2O}n (2), which exhibits {Cu2O2} rhomboid dimers formed through bridging acetate ligands. Weak antiferromagnetic coupling [g = 1.984(3), J = -3.2(3) cm-1] was observed within the axial-equatorial bridged {Cu2O2} dimers in 2, with possible ferrimagnetism due to spin canting <11 K.N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3Recommanded Product: N-(Pyridin-4-yl)isonicotinamide) was used in this study.
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.Recommanded Product: N-(Pyridin-4-yl)isonicotinamide 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