Copper(II) azido complexes containing trinitrogen ligands:: [Cu(η3-L)(N3)]2[Cu2Cl2(N3)4] [L=2,6-bis(3,4-dihydro-2H-pyrrol-5-yl)pyridine], a tridimensional network of cationic and anionic copper complexes

A series of copper(II) azido complexes containing a tridentate trinitrogen ligand, [Cu(eta(3)-L)(N-3)](+) [L = 2,6-bis(3,4-dihydro-2H-pyrrol-5-yl)pyridine] as well as [Cu(eta(3)-R,S-LH4)(N-3)](+), [Cu(eta(3)-S,S-LH4)(N-3)](+) and [Cu(eta(3)-R,R-LH4)(N-3)](+) [LH4 = 2,6-bis(pyrrolidin-2-yl)pyridine] have been synthesised from Cu(ClO4)(2).6 H2O, NaN3 and the corresponding tridentate ligand and crystallised from methanol as the perchlorate salts. The single crystal X-ray structure analyse show these complexes to form one-dimensional networks by Cu...N(azide) intermolecular interactions, depending on the conformation of the tridentate ligand. In the case of L, an excess of sodium azide leads to the formation of the salt [Cu(eta(3)-L)(N-3)](2)[Cu2Cl2(N-3)(4)], the crystal structure analysis of which reveals a surprising tridimensional network of cationic and anionic copper(II) complexes linked by Cu...N(azide) and Cu...N(L) interactions. (C) 2003 Elsevier Science B.V. All rights reserved.