WebDependence of coefficients metal distribution on acidity of aqueous phase is of the extremum character, the extraction maximum is observed at 1.5-2.0 mol/l HNO/sub 3/. Crystalline complex of strontium nitrate with crown ether of dicyclohexyl-18-crown-6 of the composition Sr(NO/sub 3/)/sub 2/xS is singled out, its IR spectrum being recorded. WebCatalytic effect of dicyclohexyl-18-crown-6-ether stereoisomers in the substitution reactions of aromatically bound chlorine by fluorine. Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 1987 , 36 (3) , 629-630.
Macrocyclic Polyethers: Dibenzo-18-crown-6 Polyether and Dicyclohexyl …
WebJan 3, 2000 · The extraction of Ln with the synergistic mixture of HTTA and a crown ether (CE: 12-crown-4, 18-crown-6, cyclohexano-18-crown-6 or benzo-18-crown-6) was also investigated at 25.0C. Webtrans,syn,trans-Dicyclohexyl-18-crown-6 (2b) forms crystalline complexes with alkali metal, ammonium, and primary alkylammonium salts. In methanolic solutions, the stability constants for the complexes with sodium, potassium, and caesium chlorides are greater for the cis , anti ,- cis -(2c) and cis , syn , cis -(2d) isomers than they are for ... how is chagas disease diagnosed
Sensors Free Full-Text Flow-Injection Amperometric …
WebSynthesis, Characterization and Thermogravimetric Analysis of Two Dicyclohexyl-18-crown-6 Pd, Pt Isomaleonitriledithiolate Complexes. Journal of Inorganic and Organometallic Polymers and Materials 2006 , 16 (1) , 61-67. WebCrystalline complex of strontium nitrate with crown ether of dicyclohexyl-18-crown-6 of the composition Sr(NO 3) 2 xS is singled out, its IR spectrum being recorded. The results obtained are of interest for analytical practice and for … WebThe present invention relates to a synthetic technology for improving dicyclohexyl-18-crown-6, which belongs to the field of preparing crown ether compounds. In order to solve the problems of low synthetic yield rate and low content of a DCH18C6 cis-stereoisomer as an effective component of the existing dicyclohexyl-18-crown-6(DCH 18C6), the … how is chain made