Sodium bromide dihydrate

Cuprous bromide. The solid salt may be prepared by dissolving 150 g. of copper sulphate crystals and 87 5 g. of sodium bromide dihydrate in 500 ml. of warm water, and then adding 38 g. of powdered sodium sulphite over a period of 5-10 minutes to the stirred solution. If the blue colour is not completely discharged, a little more sodium sulphite should be added. The mixture is then cooled, the precipitate is collected in a Buchner funnel, washed twice with water containing a little dissolved sulphurous acid, pressed with a glass stopper to remove most of the liquid, and then dried in an evaporating dish or in an air oven at 100 120°. The yield is about 80 g. 

A solution of cuprous bromide may be prepared either by dissolving the solid in hot constant boiling point hydrobromic acid or by refluxing a mixture of 63 g. of crystallised copper sulphate, 20 g. of copper turnings, 154 g. of sodium bromide dihydrate, 30 g. (16-3 ml.) of concentrated sulphuric acid and 1 litre of water for 3-4 hours. If the colour of the solution has not become yellowish after this period of heating, a few grams of sodium sulphite should be added to complete the reduction. 

C12H22O11 Na+ Br- 2 H20 Sucrose sodium bromide, dihydrate SUCNAB 31 367... 

The hydrates of sodium iodide 22 resemble those of sodium bromide. Dihydrated sodium iodide, NaI.2H20, is stable over the range —13 5° to 65° at the latter... 

In the D-fructofuranose residue of sucrose sodium bromide dihydrate, C-1, C-2, C-5, and the ring-oxygen atom are nearly coplanar, and C-3 is about 0.5 A. out of this plane. In sucrose, itself, however, such a simple description is not possible. The stereochemistry of the D-fructofuranose moiety is illustrated in Fig. 3. It seems likely that subsequent, accurate analyses of the other furanoid structures will reveal that the stereochemistry described in Fig. 5 is always an over-simplification, approximating to the true shape of the furanoid ring in certain molecules only. 

Dheu-Andries ML, Perez S (1983) Geometrical features of calcium-carbohydrate interactions. Carbohydr Res 124(2) 324-332. doi 10.1016/0008-6215(83)88468-7 Beevers CA, Cochran W (1947) The crystal structure of sucrose sodium bromide dihydrate. Proc R Soc London Ser A 190 257-272. 

D Glucopyranosyl-D-glucitol, 45B, 470 Sophorose monohydrate, 44B, 403 Isomaltulose, 39B, 310 a-Lactose monohydrate, 37B, 244 a-Melibiose monohydrate, 42B, 323 a,p-Melibiose monohydrate, 44B, 403 -Maltose monohydrate, 35B, 266 43B, 546 2H26BrNaO,3, Sucrose-sodium bromide dihydrate, 11, 624 2H26O4S3, 2-S-Ethyl-2-thio-D-mannose diethyl dithioacetal, 40B,... 

---