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[n + n]-Heterometallomacrocyclic complexes (n < or = 2) prepared from platinum(II)-centred ditopic 2,2':6',2''-terpyridine ligands: dimensional cataloguing by pulsed-field gradient spin-echo NMR spectroscopy

Beves, Jonathon E. and Constable, Edwin C. and Housecroft, Catherine E. and Neuburger, Markus and Schaffner, Silvia and Shardlow, Ellen J.. (2007) [n + n]-Heterometallomacrocyclic complexes (n < or = 2) prepared from platinum(II)-centred ditopic 2,2':6',2''-terpyridine ligands: dimensional cataloguing by pulsed-field gradient spin-echo NMR spectroscopy. Dalton Transactions, 16. pp. 1593-1602.

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Official URL: http://edoc.unibas.ch/dok/A6056015

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Abstract

The reaction of 4`-(2-propyn-1-oxy)-2,2`:6`,2``-terpyridine (HC equivalent to CCH(2)Oterpy) with trans-[PtI2(PR3)(2)] (R = Et, Bu-n, Ph) results in the regioselective formation of the metalloditopic ligands trans-[Pt(C equivalent to CCH(2)Oterpy)(2)(PR3)(2)], crystallographic data for which are presented. Each ditopic ligand reacts with FeCl2 center dot 4H(2)O to give heterometallomacrocycles, the smallest of which is a [2 + 2] macrocycle, confirmed structurally for R = Et. The NMR spectroscopic data confirm the formation of symmetrical species, i.e. macrocyclic and not polymeric species. The distribution of products has been investigated using pulsed-field gradient spin-echo (PGSE) diffusion NMR spectroscopy, and indicates that the kinetic products from the reactions of 1, 2 or 3 (L) with iron(II) are [FenLn](2n+) with n = 2, 3 or 4. For L = 1 and 2, these mixtures of products convert in solution to the thermodynamically favoured [Fe2L2](4+).
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Constable, Edwin Charles and Housecroft, Catherine Elizabeth and Neuburger, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Royal Society of Chemistry
ISSN:1477-9226
e-ISSN:1477-9234
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:12 Apr 2017 07:21
Deposited On:01 Feb 2013 08:39

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