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Lookup NU author(s): Dr Mark Elsegood
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The cyclocondensation of pyrrole-2,5-dicarbaldehyde and the amines N,N-bis(2-aminoethyl)- and N,N-bis-(3-aminopropyl)-2-(aminomethyl)pyridine in the presence of silver(I) nitrate yielded homodinuclear bibracchial tetraimine Schiff base macrocyclic complexes [Ag2(L3)] 1 and [Ag2(H2L4)(ClO4) 2]·CH3CN 2. In 1 the Ag ⋯ Ag separation is 2.748 Å. In 2 the silver atoms Ag(1) and Ag(2) are disordered over two sites with refined occupancies of 94.12 and 97.22% respectively. They are three-co-ordinate in the molecule having higher silver site occupancy and four-co-ordinate in that molecule having lower occupancy; the Ag ⋯ Ag separations are 5.881 and 7.224 Å respectively. There are protonated imine nitrogen atoms present in both molecules and the structure contains a disordered acetonitrile of crystallisation.
Author(s): Adams H, Elsegood MRJ, Fenton DE, Heath SL, Ryan SJ
Publication type: Article
Publication status: Published
Journal: Journal of the Chemical Society - Dalton Transactions
Year: 1999
Issue: 12
Pages: 2031-2037
Print publication date: 21/06/1999
ISSN (print): 1477-9226
ISSN (electronic):
Publisher: Royal Society of Chemistry
URL: http://dx.doi.org/10.1039/a901992h
DOI: 10.1039/a901992h
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