4/15/2023 0 Comments Antimony chlorideThe apparent rate constants (kap) were determined and the values corroborate the catalytic efficiency of SbCl5, especially when compared to the reaction without catalyst. The best result was obtained at 80 ☌ using 0.166 mmol of SbCl5, with total conversion attained after 15 min, and selectivity of 31, 47, and 22% for MA, DA, and TA, respectively, after 180 min. To the best of our knowledge, this is the first time that this class of catalysts is evaluated in GLY acetylation to produce monoacetin (MA), diacetin (DA), and triacetin (TA). It could be used as a Lewis acid catalyst in synthetic organic transformations.Īlthough a solution of antimony trichloride in liquid hydrogen sulfide is a good conductor, its applications are limited due to the extremely low temperature or high pressure required for hydrogen sulfide to be liquid.In this study, antimony complexes (SbCl5 and SbCl3) were investigated as catalysts in glycerol (GLY) esterification with acetic acid (AA), compared to Sb2O3 and Sb2O5. Its solution is used in the analysis of chloral, aromatics, and vitamin A. It is also used as a mordant and as a catalyst in polymerization, hydrocracking, and chlorination reactions, as well as in the production of other antimony salts. It has previously been used to dissolve and remove horn stubs from calves without the need to cut them off. Antimony trichloride has also been used as an adulterant in absinthe to enhance the louche effect. Antimony trichloride reacts with the carotenoid to produce a blue complex that can be measured using colorimetry. SbCl3 is a reagent used in the Carr-Price test to detect vitamin A and related carotenoids. The point to note here is that all eight close neighbors of Bi are closer than the eight closest neighbors of Sb, demonstrating the tendency for Bi to adopt higher coordination numbers. These distances contrast with BiCl3, which has three close neighbors at 250 pm, two at 324 pm, and three at a mean of 336 pm. These eight atoms can be thought of as forming a bicapped trigonal prism. Each Sb in SbCl3 has three Cl atoms at 234 pm, demonstrating the persistence of the molecular SbCl3 unit however, there are five neighboring Cl atoms, two at 346 pm, one at 361 pm, and two at 374 pm. SbCl3 has a pyramidal structure in the gas phase, with a Cl-Sb-Cl angle of 97.2° and a bond length of 233 pm. SbCl 3 is only a weak Lewis base, however, some complexes are known for example the carbonyl complexes, Fe(CO) 3(SbCl 3) 2 and Ni(CO) 3SbCl 3. Similarly the salt (C4H9NH3)2SbCl5 contains a polymeric anion of composition n with distorted octahedral SbIII. SbCl 3 readily forms complexes with halides, but the stoichiometries are not a good guide to the composition, for example, the (C5H5NH)SbCl4 contains a chain anion with distorted SbIII octahedra. With more water, it forms Sb 4O5Cl 2 which on heating to 460° under argon converts to Sb 8O 44Cl 12. With a limited amount of water it forms antimony oxychloride releasing hydrogen chloride: SbCl 3 is readily hydrolyzed and samples of SbCl 3 must be protected from moisture. It also may be made by treating antimony trioxide with concentrated hydrochloric acid.
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