3/31/2023 0 Comments Molar mass antimony![]() SbCl 3 is a reagent for detecting vitamin A and related carotenoids in the Carr-Price test. The point to note here is that the all eight close neighbours of Bi are closer than the eight closest neighbours of Sb, demonstrating the tendency for Bi to adopt higher coordination numbers. These distances can be contrasted with BiCl 3 which has three near neighbors at 250 pm, with two at 324 pm, and three at a mean of 336 pm. These eight atoms can be considered as forming a bicapped trigonal prism. In SbCl 3 each Sb has three Cl atoms at 234 pm showing the persistence of the molecular SbCl 3 unit, however there are a further five neighboring Cl atoms, two at 346 pm, one at 361 pm, and two at 374 pm. ![]() In the gas phase SbCl 3 is pyramidal with a Cl-Sb-Cl angle of 97.2° and a bond length of 233 pm. While SbCl 3 is only a weak Lewis base, some complexes, such as the carbonyl complexes Fe(CO) With nitrogen donor ligands, L, complexes with a stereochemically active lone-pair are formed, for example Ψ-trigonal bipyramidal LSbCl 3 and Ψ-octahedral L Similarly the salt (Cĥ contains a polymeric anion of composition [SbCl 2− SbCl 3 readily forms complexes with halides, but the stoichiometries are not a good guide to the composition for example, the (CĤ contains a chain anion with distorted Sb III octahedra. With a limited amount of water it forms antimony oxychloride releasing hydrogen chloride:Ģ which on heating to 460° under argon converts to Sb SbCl 3 is readily hydrolysed and samples of SbCl 3 must be protected from moisture. Antimony trichloride solution in hydrochloric acid
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