Stannic Chloride SnClj

The third Mayo plot, (Figure 12), 1/DP against [SnClJ, has a discontinuity at a stannic chloride concentration corresponding approximately to [SnCl4]/[H20] = 1. The rising branch of the curve can be represented by a line of intercept L = 2 x 10"5 and slope S, = 8 x 10-3 1/mole. 

Dimethylarsine chlorostannide, (C IIg)2AsCI.SnCl2 or (( ll3)2A8. SnClj, results when dimethylarsine reacts with stannic chloride. It er3 tallises in large, colourU ss ntwdles, which sublime at 100" C., are... 

Stannic Chloride. Tin tetrachloride Fuming spirit of Libavius. CI4Sn mol wt 260.53. Cl 54.44%, Sn 45.56%. SnClj. Improperly called "(in bichloride . 

The above condensation takes place in dichloroethane, with stannic chloride catalyst at 50°C [210]. The maximum reaction rate varies with both, the initial concentration of l,4-dimethyl-2,5-dichloro-methylbenzene, shown above, and the initial concentration of SnCLj. Cross-linked polystyrene particles, or beads also form by Friedel-Craft suspension cross-linking of polystyrene with 1,4-dichloromethyl-2,5 dimethyl-benzene [211], The polymer is dissolved in nitrobenzene and a two-phase reaction occurs in 70% by weight of an aqueous suspension of ZnCl2. Polytyinyl alcohol) can be used as the suspending agent. 

Friedel-Crafts reaction catalysts like anhydrous aluminum chloride are readily soluble in the nitroalkanes. Solutions containing up to 50% aluminum chloride are easily prepared in nitroalkane solvents. These catalytically active complexes, AICI3-RNO2, can be isolated and used in solvents other than the nitroalkane. The reactants in the Friedel-Crafts reaction are often soluble in the nitroalkane reaction medium. Other catalysts like boron trifluoride (BF3), titanium tetrachloride (TiC ), and stannic tetrachloride (SnClj) are also soluble in the nitroalkane solvents. Reaction types which use nitroparaffins as solvents include alkylation of aromatics, acetylation of aromatics, halogenations, nitrations, and the reaction of olefins and hydrogen sulfide to yield mercaptans. Nitroparaffins are used with catalysts such as alkyl-metal (e.g., triethylaluminum, vanadium, or titanium) salts in the polymerization reactions of alkylene oxides, epichlorohydrin, propylene, butylene, vinyl chloride, and vinyl ethers. The nitroparaffin acts as an activator for the catalyst or can serve as the reaction solvent. 

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