Adducts formed by tetrahedral anions and protonated forms of 1,4,7-triazacyclononane: Competition with chloride anions

Warden, Andrew C., Warren, Mark, Battle, Andrew R., Hearn, Milton T. W. and Spiccia, Leone (2004) Adducts formed by tetrahedral anions and protonated forms of 1,4,7-triazacyclononane: Competition with chloride anions. CrystEngComm, 6 : 522-530.


Author Warden, Andrew C.
Warren, Mark
Battle, Andrew R.
Hearn, Milton T. W.
Spiccia, Leone
Title Adducts formed by tetrahedral anions and protonated forms of 1,4,7-triazacyclononane: Competition with chloride anions
Journal name CrystEngComm   Check publisher's open access policy
ISSN 1466-8033
Publication date 2004
Sub-type Article (original research)
DOI 10.1039/b411241e
Volume 6
Start page 522
End page 530
Total pages 9
Place of publication London, U.K
Publisher Royal Society of Chemistry
Language eng
Subject 0306 Physical Chemistry (incl. Structural)
Formatted abstract Five adducts formed by 1,4,7-triazacyclononane ([9]aneN3, L) and four tetrahedral anions have been crystallized from aqueous solutions containing (H3L)Cl3 and the appropriate acid, viz. (H3L)(CuCl4)Cl·H2O (1), (H3L)(ClO4)Cl2 (2), (H3L)(HSO4)Cl2 (3), (H3L)(HSO4)2Cl (4) and (H3L)(H2PO4)3 (5). Their X-ray crystal structures have provided an indication of the stable conformations of the protonated macrocycles and its binding preferences when faced with the option of two different anions as guests. The inclusion of competitive anions (such as phosphate and sulfate) with greater hydrogen bonding abilities has the effect of excluding chloride from the lattice in favor of the formation of more highly connected networks. Also revealed are the tendencies of the anions and macrocycles to form supramolecular architectures through hydrogen bonding and electrostatic interactions, such a tripodal co-ordination pyramid formed by chloride anions and η-2 chelation by the macrocycle of a single oxygen on hydrogen sulfate and hydrogen phosphate anions. The series shows hydrogen bonded 2D sheets, 3D networks and an isolated (HSO4)4 cluster is found in 4.
© The Royal Society of Chemistry 2004
Keyword 1,4,7 Triazacyclononane
Alkane derivative
Anion
Chloride ion
Macrocyclic compound
Chemical modification
Conformational transition
X-ray crystallography
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Biological Sciences Publications
 
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