Structural studies on supramolecular adducts of cyclodextrins with the complex [Ru([9]aneS(3))(bpy)Cl]Cl
authors Marques, J; Anjo, L; Marques, MPM; Santos, TM; Paz, FAA; Braga, SS
nationality International
journal JOURNAL OF ORGANOMETALLIC CHEMISTRY
author keywords cyclodextrins; inclusion compounds; ruthenium complexes; powder X-ray diffraction
keywords PERMETHYLATED BETA-CYCLODEXTRIN; MOLYBDENOCENE DICHLORIDE CP2MOCL2; METAL-CARBONYL-COMPLEXES; C-13 CHEMICAL-SHIFTS; INCLUSION-COMPOUNDS; POWDER DIFFRACTION; CRYSTAL-STRUCTURES; DICHOTOMY METHOD; EPOXIDATION; CHEMISTRY
abstract The complex [Ru([9]aneS(3))(bpy)Cl]Cl (bpy = 2,2'-bipyridine) was immobilised in plain beta-cyclodextrin (beta-CD) and permethylated beta-CD (TRIMEB) to yield two adducts with a 1: 1 host: guest stoichiometry. The adducts were studied by powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), (13)C{(1)H} CP/MAS NMR and vibrational spectroscopy (FT-IR and Raman). Results support the formation of stable supramolecular adducts with a proposed geometry in which the coordinated bypiridine fragment of the guest is partially included in the host cavities, and the bulky [9] aneS(3) fragment protrudes out to the interstitial spaces. A packing mode is proposed for [Ru([9]aneS(3))(bpy)Cl]Cl. TRIMEB, obtained by Monte Carlo optimisation of the XRD data. TRIMEB molecules are stacked in tilted channels, with the voluminous part of the guest molecules in the inter-channel space. The behaviour of [Ru([9]aneS(3))(bpy)Cl] Cl upon CD encapsulation and the chloride ligand hydrolysis process in solution for all compounds were studied in detail by Raman spectroscopy. (C) 2008 Elsevier B. V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0022-328X
year published 2008
volume 693
issue 18
beginning page 3021
ending page 3028
digital object identifier (doi) 10.1016/j.jorganchem.2008.06.023
web of science category Chemistry, Inorganic & Nuclear; Chemistry, Organic
subject category Chemistry
unique article identifier WOS:000258394400011
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