NDLI: One-Pot Mechanosynthesis with Three Levels of Molecular Self-Assembly: Coordination Bonds, Hydrogen Bonds and Host–Guest Inclusion

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One-Pot Mechanosynthesis with Three Levels of Molecular Self-Assembly: Coordination Bonds, Hydrogen Bonds and Host–Guest Inclusion

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Skalec Samec, Dijana Friscic, Tomislav Kaitner, Branko Fábián, László Mestrovic, Ernest
Description	Author Affiliation: Friscic T ( Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK. tf253@cam.ac.uk)
Abstract	Liquid-assisted grinding (LAG) was used to combine three levels of molecular self-assembly into a one-pot mechanochemical approach for the construction of metal–organic materials. The approach was applied for the construction of three adducts of cobalt(II) dibenzoylmethanate with isonicotinamide, nicotinamide and imidazole, to screen for their inclusion compounds. The one-pot process consists of: i) The coordination-driven binding of addends to the equatorially-protected metal ion, resulting in “wheel-and-axle”-shaped complexes; ii) self-assembly of resulting complexes by way of hydrogen-bonded synthons to form metal–organic inclusion hosts; iii) in situ inclusion of the grinding liquid in the resulting host. This approach provided quantitatively and within 20 min the known inclusion compounds of the bis(isonicotinamide) adduct in a single synthetic step. Changing the liquid phase in LAG was used to explore the inclusion behaviour of new wheel-and-axle adducts with nicotinamide and imidazole, revealing several inclusion compounds, as well as two polymorphs, of the bis(nicotinamide) host. Preliminary results suggest that one-pot LAG is superior to solution synthesis in screening for metal–organic inclusion compounds. The difference between the methods is rationalised in terms of reactant solubility and solvent competition. In contrast to the nicotinamide adduct, the bis(imidazole) adduct did not form inclusion compounds. The difference in the inclusion properties of the two adducts is rationalised by structural information gathered by single crystal and powder X-ray diffraction.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	46
Volume Number	15
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2009-11-23
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Organometallic Compounds Chemistry Chemical Synthesis Cobalt Hydrogen Bonding Models, Molecular Molecular Conformation Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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