| Does a reinforced kinetic macrocyclic effect exist? the demetallation in strong acid of copper(II) Complexes with open and cyclic tetramines containing a piperazine fragment. | |
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MedLine Citation:
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PMID: 15224329 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The demetallation in acidic solution of the Cu(II) complexes with open-chain and cyclic tetramines containing a piperazine unit (2 and 3) has been investigated in terms of its kinetic aspects and compared with the behaviour of unsubstituted counterparts (tetramines 1 and 4). The presence of the piperazine fragment slows demetallation of the open-chain-ligand complex owing to the activation barrier associated with the conformational change from boat-to-half-boat; however, it does not affect the demetallation of the macrocyclic complex, which involves the spontaneous boat-to-twist conformational change. Thus, lateral reinforcement of a cyclam-like ligand does not add any further contribution to the typical inertness in demetallation of macrocyclic complexes. |
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Authors:
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Massimo Boiocchi; Marco Bonizzoni; Luigi Fabbrizzi; Francesco Foti; Maurizio Licchelli; Antonio Poggi; Angelo Taglietti; Michele Zema |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Chemistry (Weinheim an der Bergstrasse, Germany) Volume: 10 ISSN: 0947-6539 ISO Abbreviation: Chemistry Publication Date: 2004 Jul |
Date Detail:
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Created Date: 2004-06-29 Completed Date: 2005-04-19 Revised Date: 2009-08-04 |
Medline Journal Info:
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Nlm Unique ID: 9513783 Medline TA: Chemistry Country: Germany |
Other Details:
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Languages: eng Pagination: 3209-16 Citation Subset: - |
Affiliation:
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Dipartimento di Chimica Generale, Università di Pavia, via Taramelli 12, 27100 Pavia, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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