Polyamines XIV. Protonation Equilibria of Linear Tetraamines Containing two Ethylenediamine Residues

✍ Scribed by Giorgio Anderegg; Peter Bläuenstein

• Book ID: 102251765
• Publisher: John Wiley and Sons
• Year: 1982
• Tongue: German
• Weight: 396 KB
• Volume: 65
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19820650115

✦ Synopsis

The syntheses of the linear tetraamines H2N-(CH2)2-NH-(CH,),-NH-(CH2)2 -NH2 (n = 4 and 5) are described. The protonation of the homologous tetraamines for n=2, 3, 4, 5, 6 and 8, as well as of N-methylethylenediamine, was investigated using potentiometric and calorimetric measurements. The results obtained are discussed taking into consideration the substituent effect on the basicity of the aminic N-atoms.

Introduction. -A simple series of linear N-ligands in which the distance between the N-atoms is varied is represented by the tetraamines 2, n, 2-tet of type I.