For reproduction of material from all other RSC journals and books: For reproduction of material from all other RSC journals. (Thio)urea organocatalysis - What can be learnt from anion recognition? polymorphs that are stable above and below 120°, solid I and solid II, resp. E-mail: Instructions for using Copyright Clearance Center page for details. Xu-Sheng Gao, Hai-Jie Dai, Yuerou Tang, Mei-Juan Ding, Wen-Bo Pei. This significant difference might be attributed to the most compact and strong hydrogen bonding interactions in 5-FU urea … Although the size difference between urea and thiourea is not significant, however the crystallite size of 5-FU-Th is almost double than that calculated for 5-FU-U co-crystals. one or more urea/thiourea fra gments are incorporated in an. The properties of urea and thiourea differ significantly. Synthesis, biological and molecular dynamics investigations with a series of triazolopyrimidine/triazole-based benzenesulfonamides as novel carbonic anhydrase inhibitors. Munendra Pal Singh, Arup Tarai, Jubaraj Bikash Baruah. An Exercise in Crystal Engineering,, Preparation of layered diacetylenes as a demonstration of strategies for supramolecular synthesis,, Structural diversity in 1,3-bis(m-cyanophenyl)urea, Structural Diversity in 1,3-Bis(m-cyanophenyl)urea,, Crystal engineering with urea and thiourea hydrogen-bonding groups,, Anion sensing properties of new colorimetric chemosensors based on thiourea and urea moieties,, A Naked eye detection of fluoride with urea receptors which have both an azo group and a nitrophenyl group as a signaling group, A naked eye detection of fluoride with urea receptors which have both an azo group and a nitrophenyl group as a signaling group,, The maiden report of a fluorescent-colorimetric sensor for expeditious detection of bifluoride ion in aqueous media,, Thiourea-halide lattices. The tendency towards deprotonation increases with the acidity of the receptor and with the stability of the [HX2]− self-complex. Please reconnect. Plot of the sum of the cyanide-(thio)urea H-bond lengths in B3LYP/6-31G(d) transition structures versus experimental energy difference between … Find more information about Crossref citation counts. In particular, urea and thiourea can estab lish tw o directional H-bonds with the Y -shaped carbo xylate gr oup or chela te a spherical anion ( e. g. , halides). O Tape Synthon in Pyridyl Ureas,, Anion recognition and sensing: the state of the art and future perspectives, DOI: 10.1002/1521-3773(20010202)40:3<486::aid-anie486>;2-g,, Artificial organic host molecules for anions, Artificial Organic Host Molecules for Anions,, Equilibrium acidities in dimethyl sulfoxide solution,, Why, on interaction of urea-based receptors with fluoride, beautiful colors develop, Why, on Interaction of Urea-Based Receptors with Fluoride, Beautiful Colors Develop,, Recognition and sensing of fluoride anion, Chemical Communications (Cambridge, United Kingdom),, Imine-tautomers of aminothiazole derivatives: intriguing aspects of chemical reactivities,, While deprotonating 1-(4-nitrophenyl)-3-((pyridin-4-yl)methyl)thiourea by tetrabutylammonium fluoride also provides a means for etching of glass,, The crystal structure of the urea–hydrocarbon complexes, Crystal structure of the urea-hydrocarbon complexes,, Structural properties of urea inclusion compounds containing carboxylic acid anhydride guest molecules: anomalous modes of guest-molecule ordering,, Structural aspects of urea inclusion compounds and their investigation by X-ray diffraction: a general discussion, Structural aspects of urea inclusion compounds and their investigation by x-ray diffraction: a general discussion, Journal of the Chemical Society, Faraday Transactions,, Bis(thiourea)-1,2-diazabicyclo[2.2.2]octane. Information about reproducing material from RSC articles with different licences or in a thesis or dissertation provided that the correct acknowledgement is given Changing π-Interactions and Conformational Adjustments of N-(Isonicotinylhydrazide)-1,8-naphthalimide by Hydration and Complexation Affect Photophysical Properties. to access the full features of the site or access our. H-bond distances between thiourea (X = S) or urea (X = O) and cyanide anion. XX is the XXth reference in the list of references. -(aryl)-2-(propan-2-ylidene)hydrazine carbothioamides. Water contents were significantly higher by 3–6% in the two analogue treatments relative to all others, but there was no difference between gills perfused with 175 mmol L −1 thiourea plus 175 mmol L −1 urea versus 175 mmol L −1 acetamide plus 175 mmol L −1 urea. Urea and thiourea derivatives have been successfully employed in multiple diastereo- and enantioselective reactions and the versatility of these urea derivatives as general acids has been established by several research groups. acyclic, cyclic or poly cyclic framew ork. An aqueous solution of thiourea dioxide has a pH about 6.5 at which thiourea dioxide is hydrolyzed to urea and sulfoxylic acid. D. E. Gómez, L. Fabbrizzi, M. Licchelli and E. Monzani, Dipartimento di Chimica Generale, Università di Pavia, via Taramelli 12, Pavia, Italy, Instructions for using Copyright Clearance Center page. with the reproduced material. Please enable JavaScript formally request permission using Copyright Clearance Center. * If you are the author of this article you still need to obtain permission to reproduce Distinct differences are obsd. (NH2)2CS, Journal of Inclusion Phenomena and Molecular Recognition in Chemistry,, Encapsulation of [X2(H2O)4]2- (X = F/Cl) clusters by pyridyl terminated tripodal amide receptor in aqueous medium: single crystal X-ray structural evidence,, Anion binding studies of tris(2-aminoethyl)amine based amide receptors with nitro functionalized aryl substitutions: A positional isomeric effect,, Synthesis and characterization of a tripodal amide ligand and its binding with anions of different dimensionality, Synthesis and Characterization of a Tripodal Amide Ligand and Its Binding with Anions of Different Dimensionality,, Spectroscopic, structural, and theoretical studies of halide complexes with a urea-based tripodal receptor, Spectroscopic, Structural, and Theoretical Studies of Halide Complexes with a Urea-Based Tripodal Receptor,, Water assisted anion chains and anion dependent fluorescence emission in salts of N,N′-bis(3-imidazol-1-ylpropyl)naphthalenediimide, Water assisted anion chains and anion dependent fluorescence emission in salts of N,N'-bis(3-imidazol-1-ylpropyl)naphthalenediimide,, 1,3-Bis(m-nitrophenyl)urea: An exceptionally good complexing agent for proton acceptors, 1,3-Bis(m-nitrophenyl)urea: an exceptionally good complexing agent for proton acceptors,


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