Webthree-fold axis of the carbonate anion cryptate indicates that the cryptand retains the propeller-like (D 3)conformation observed in the peroxide dianion cryptate, but the plane of the [CO 3] 2− unit is perpendicular to the cryptand pseudo-C 3 axis (the peroxide dianion in 1 lies along the cryptand pseudo-C 3 axis). WebA tosylated azacryptand readily protonates at the bridgehead amines, becoming a potential ditopic anion receptor. The in-in conformation of the amines facilitates encapsulation of two bromide guests and represents the first structural evidence that a proton cage cryptate can bind two anions internally. ... Cryptand-like anion receptors ...
Bistren cryptands and cryptates: versatile receptors for …
WebJun 23, 2024 · One topical area of supramolecular chemistry is the binding of anionic species but despite the importance of anions in diverse cellular processes and for cancer development, anion receptors... WebCryptands utilize inside CH or NH groups as hydrogen bond (H-bond) donors to capture anions such as halides. In this work, the nature and selectivity of confined hydrogen … cyber world song
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WebBistrens can operate as effective anion receptors in two ways: (i) in their protonated form, providing six secondary ammonium groups capable of establishing hydrogen bonding … WebThe impact of the solvent environment on the stabilization of the complexes formed by fluorine (T-F) and cyanide (T-CN) substituted tweezers with halide anions has been investigated theoretically. The study was carried out using computational methodologies based on density functional theory (DFT) and symmetry adapted perturbation theory … WebAnion receptors with 1,3,5‐triazacyclohexane and 1,4,7,10‐tetraazacyclododecane scaffolds. Journal of Physical Organic Chemistry 2024, 33 ... Multiple deuterium exchange between DMSO-d6 … cyber world theme