Synthesis of new 14- and 16-membered macrocycles and their transition metal complexes

✍ Scribed by Sartaj Tabassum; Nahid Nishat; Farukh Arjmand; Lutfullah; Khwaja Salahuddin Siddiqi

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 293 KB
• Volume: 21
• Category: Article
• ISSN: 0340-4285
• DOI: 10.1007/bf00136535

✦ Synopsis

Benzoylacetic acid (1 tool) interacts with ethylenediamine or with propanediamine (2 tool) to yield new N 4 macrocycles 1,5,8,12-tetraazacyclotetradeca-2,4,9,11-tetraphenyl-3,10-dicarboxylic-4,11-diacetic acid-1,8-diene (L~) and 1,5,9,13-tetraazacyclohexadeca-2,4,10,12-tetraphenyl-3,11-dicarboxylic-4,12-diacetic acid-l,9-diene (L2), respectively. These macrocycles have been successfully complexed with Cr "~, Fe III, Mn', Co II, Ni H, Cu" and Zn II. The complexes of the divalent metal ions are non-electrolytes, while those of Fe "~ and Cr I" are 1 : 1 electrolytes in DMSO. On the basis ofligand field spectra and magnetic moments an octahedral geometry has been proposed for all the complexes.