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Macrocyclic Melamine‐Based Ligand Complexes as Building Blocks for the Metal‐Directed Synthesis of Heterometallic Di‐ and Trinuclear Compounds
Author(s) -
Comba Peter,
Lampeka Yaroslaw D.,
Lötzbeyer Lutz,
Prikhod'ko Alexander I.
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200390002
Subject(s) - chemistry , melamine , nickel , ligand (biochemistry) , copper , intramolecular force , cyclam , polymer chemistry , metal , electrochemistry , electron paramagnetic resonance , diamine , stereochemistry , medicinal chemistry , crystallography , organic chemistry , biochemistry , receptor , physics , electrode , nuclear magnetic resonance
Heterodi‐ and heterotrimetallic Ni II /Cu II , Ni 2 II /Cu II and Ni II /Cu 2 II complexes of bis‐ and tris‐macrocyclic ligands, linked by a 1,3,5‐triazine spacer group, are obtained as products of copper( II )‐ or nickel( II )‐assisted condensations of the open‐chain tetraamine complexes [M 2 (2,3,2‐tet)] 2+ [2,3,2‐tet= bis‐ N , N ′‐(2‐aminoethyl)propane‐1,3‐diamine, M 2 = Ni II or Cu II ] with formaldehyde and the monomacrocyclic ligand complexes [M 1 (L 1 )] 2+ , where L 1 is a cyclam‐type macrocycle with a pendent melamine group (M 1 = Cu II or Ni II ). The spectroscopic (UV/Vis and EPR) and electrochemical properties of the oligonuclear heterometallic compounds in comparison with those of the homometallic analogues indicate small, but significant, intramolecular metal‐metal interactions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)