Nickel(II) and iron(II) triple helicates assembled from expanded quaterpyridines incorporating flexible linkages

Glasson, Christopher R. K., Meehan, George V., Motti, Cherie A., Clegg, Jack K., Turner, Peter, Jensen, Paul and Lindoy, Leonard F. (2011) Nickel(II) and iron(II) triple helicates assembled from expanded quaterpyridines incorporating flexible linkages. Dalton Transactions, 40 45: 12153-12159. doi:10.1039/c1dt10820d

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Author Glasson, Christopher R. K.
Meehan, George V.
Motti, Cherie A.
Clegg, Jack K.
Turner, Peter
Jensen, Paul
Lindoy, Leonard F.
Title Nickel(II) and iron(II) triple helicates assembled from expanded quaterpyridines incorporating flexible linkages
Journal name Dalton Transactions   Check publisher's open access policy
ISSN 1477-9226
1477-9234
Publication date 2011-01
Sub-type Article (original research)
DOI 10.1039/c1dt10820d
Volume 40
Issue 45
Start page 12153
End page 12159
Total pages 7
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Formatted abstract
In the present study the interaction of Fe(ii) and Ni(ii) with the related expanded quaterpyridines, 1,2-, 1,3- and 1,4-bis-(5′-methyl-[2,2′] bipyridinyl-5-ylmethoxy)benzene ligands (4-6 respectively), incorporating flexible, bis-aryl/methylene ether linkages in the bridges between the dipyridyl domains, was shown to predominantly result in the assembly of [M 2L 3] 4+ complexes; although with 4 and 6 there was also evidence for the (minor) formation of the corresponding [M 4L 6] 8+ species. Overall, this result contrasts with the behaviour of the essentially rigid 'parent' quaterpyridine 1 for which only tetrahedral [M 4L 6] 8+ cage species were observed when reacted with various Fe(ii) salts. It also contrasts with that observed for 2 and 3 incorporating essentially rigid substituted phenylene and biphenylene bridges between the dipyridyl domains where reaction with Fe(ii) and Ni(ii) yielded both [M 2L 3] 4+ and [M 4L 6] 8+ complex types, but in this case it was the latter species that was assigned as the thermodynamically favoured product type. The X-ray structures of the triple helicate complexes [H 2O⊂Ni 2(4) 3](PF 6) 4·THF·2.2H 2O, [Ni 2(6) 3](PF 6) 4·1.95MeCN·1. 2THF·1.8H 2O, and the very unusual triple helicate PF 6 - inclusion complex, [(PF 6)⊂Ni 2(5) 3](PF 6) 3·1. 75MeCN·5.25THF·0.25H 2O are reported.
Keyword Metallo supramolecular chemistry
Adamantanoid chelate complexes
Anion binding
Coordination chemistry
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes First published on the web 24 August 2011.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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