Hydrogen bond energies of 2-aminopyridine dimer and 2-aminopyridine-2-pyridone complex formation

✍ Scribed by Kozo Inuzuka; Akira Fujimoto

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 410 KB
• Volume: 40
• Category: Article
• ISSN: 1386-1425
• DOI: 10.1016/0584-8539(84)80115-4

✦ Synopsis

The formation energies of 2-aminopyridine dimer and 2-aminopyridine-2-pyridone complex were measured in C,D, solution by 'H-NMR spectroscopy and values of 25.1 and 44.6 kJ/mol were obtained. The former value is about twice the magnitude of hydrogen bond energies which are generally observed for the N---H-N system, and latter value is about half the sum of the formation energies of the 2aminopyridine and 2-pyridone dimers. The formation energies of 2-aminopyridine dimer and 2aminopyridine-2-pyridone complex were calculated by the CNDO/Z method, and their formation energies (-AH) were estimated to be 28.5 and 42.8 kJ/mol, respectively.