Publications by authors named "Ruth Patchett"

3 Publications

  • Page 1 of 1

Potassium Binding Adjacent to Cationic Transition-Metal Fragments: Unusual Heterobimetallic Adducts of a Calix[4]arene-Based Thione Ligand.

Inorg Chem 2017 Nov 2;56(22):14345-14350. Epub 2017 Nov 2.

Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, U.K.

The synthesis of cationic rhodium and iridium complexes of a bis(imidazole-2-thione)-functionalized calix[4]arene ligand and their surprising capacity for potassium binding are described. In both cases, uptake of the alkali metal into the calix[4]arene cavity occurs despite adverse electrostatic interactions associated with close proximity to the transition-metal fragment [Rh···K = 3.715(1) Å; Ir···K = 3.690(1) Å]. The formation and constituent bonding of these unusual heterobimetallic adducts have been interrogated through extensive solution and solid-state characterization, examination of the host-guest chemistry of the ligand and its upper-rim unfunctionalized calix[4]arene analogue, and use of density functional theory based energy decomposition analysis.
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http://dx.doi.org/10.1021/acs.inorgchem.7b02441DOI Listing
November 2017

Coordination chemistry of a calix[4]arene-based NHC ligand: dinuclear complexes and comparison to I(i)Pr2Me2.

Dalton Trans 2016 Jun 10;45(21):8945-55. Epub 2016 May 10.

Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.

The preparation and coordination chemistry of 5,17-bis(3-methyl-1-imidazol-2-ylidene)-25,26,27,28-tetrapropoxycalix[4]arene (1) is described. Starting from the bis(imidazolium) pro-ligand 1·2HI, the free carbene 1 was readily generated in solution through deprotonation using K[O(t)Bu] and its reactivity with rhodium(i) dimers [Rh(COD)Cl]2 (COD = 1,5-cyclooctadiene) and [Rh(CO)2Cl]2 investigated. Dinuclear complexes were isolated in both cases, where the calix[4]arene-based NHC ligand adopts a bridging μ(2)-coordination mode, and in one case characterised in the solid-state by X-ray diffraction. Using instead an isolated and well-defined (mononuclear) silver transfer agent, generated by reaction of 1·2HI with Ag2O in the presence of a halide extractor, reactions with [Rh(COD)Cl]2 and [Rh(CO)2Cl]2 produced cationic dinuclear complexes bearing μ(2)-1 and μ(2)-Cl bridging ligands. The structural formulation of the novel dinuclear adducts of 1 was aided through spectroscopic congruence with model complexes, containing monodentate 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (I(i)Pr2Me2).
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http://dx.doi.org/10.1039/c6dt01001fDOI Listing
June 2016

Asymmetric hydrogenation of ketones with H2 and ruthenium catalysts containing chiral tetradentate S2N2 ligands.

Angew Chem Int Ed Engl 2013 Sep 12;52(39):10352-5. Epub 2013 Aug 12.

Corporate R&D Division, Firmenich SA route des Jeunes 1, P.O. Box 239, 1211 Genève 8 (Switzerland).

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http://dx.doi.org/10.1002/anie.201304844DOI Listing
September 2013
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