Cu(II) complexes with a pendant octaazamacrocycle and µ-bonded aromatic carboxylates

• Main Authors: Vučković Gordana, Antonijević Mirjana, Poleti Dejan D.
• Format: Article
• Language: English
• Published: Serbian Chemical Society 2002-01-01
• Series: Journal of the Serbian Chemical Society
• Subjects: copper(ii) complexes; octaazamacrocycle; benzoate; phthalate; isophthalate.
• Online Access: http://www.doiserbia.nb.rs/img/doi/0352-5139/2002/0352-51390210677V.pdf

Three new cationic mixed-ligand Cu(II) complexes with N,N’,N’’,N’’’-tetrakis(2-pyridylmethyl)- 1,4,8,11-tetraazacyclotetradecane (tpmc) and bridging aromatic mono- or dicarboxylate ligands were prepared. Elemental analysis, conductometric and magnetic measurements, as well as electronic and IR spectroscopy were employed for their characteriization. It is proposed that the complexes [Cu2(C6H5COO)tpmc](CIO4)3MeOH and [Cu2(Hpht)tpmc](CIO4). 3H2O(H2pht=phthalic acid) are binuclear with µ-coordination of the carboxylate monoanions. The third complex [Cu4ipht(tpmc)2](CIO4)6NaClO42MeCN (H2ipht=isophthalic acid) is one of the rare tetranuclear Cu(II)-tpmc complexes with an aromatic dicarboxylate ion bridging two Cu2tpmc units. This was also confirmed by preliminary results of the determination of the crystal structure.