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Cesium Octabromodirenate (III)

Cesium octabromodirenate (III) is an inorganic compound, cesium salt and octabromodrenic acid with the formula Cs 2 Re 2 Br 8 , black crystals.

Octabromodirenate
Are common
Systematic
name
cesium octabromodirenate (III)
Chem. formulaCs 2 Re 2 Br 8
Physical properties
conditionblack crystals
Molar mass1277.46 g / mol
Density5.10 g / cm³
Thermal properties
Enthalpy of Education-1171 [1] kJ / mol

Getting

  • Recovery of potassium perrenate with hypophosphorous acid :
2KReOfour+fourH3PO2+eightHBr+2CsBr→90oC{\ displaystyle {\ mathsf {2KReO_ {4} + 4H_ {3} PO_ {2} + 8HBr + 2CsBr \ {\ xrightarrow {90 ^ {o} C}} \}}}  
→90oCCs2Re2Breight↓+fourH3PO3+fourH2O+2KBr{\ displaystyle {\ mathsf {\ {\ xrightarrow {90 ^ {o} C}} \ Cs_ {2} Re_ {2} Br_ {8} \ downarrow + 4H_ {3} PO_ {3} + 4H_ {2} O + 2KBr}}}  

Physical Properties

cesium octabromodirenate (III) forms black crystals of rhombic syngony , space group P bca , cell parameters a = 1.2625 nm, b = 1.2953 nm, c = 1.0141 nm, Z = 4.

Not soluble in ethanol .

Notes

  1. ↑ Lester R. Morss, Robert J. Porcja, James W. Nicoletti, Joseph San Filippo Jr., H. Donald B. Jenkins. Enthalpy of formation of dicesium octabromodirhenium (III), Cs 2 Re 2 Br 8 , and a thermochemical estimate of the energy of the rhenium-rhenium quadruple bond // J. Am. Chem. Soc .. - 1980. - T. 102 , No. 6 . - S. 1923-1927 . - DOI : 10.1021 / ja00526a027 .

Literature

  • Inorganic Synthesis Guide: 6 Vol. / Ed. Brower, G. - Moscow : Mir, 1985 .-- V. 5 .-- 360 p.


Source - https://ru.wikipedia.org/w/index.php?title=Octabromodirenate(III)_Cesium&oldid=80661775


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