scholarly journals Vulcanization of butyl rubber halides ( butyl bromide and butyl chloride ).(10).

1990 ◽  
Vol 63 (3) ◽  
pp. 175-176
Keyword(s):  
Butyl Rubber ◽  
Butyl Chloride ◽  
Butyl Bromide

Reactivity of Interstitial Cl− Anions in Synthetic Hydrotalcite-Like Materials in the Halide Exchange Reaction with Alkyl Halides

1994 ◽  
Vol 368 ◽  
Author(s):  
Esteban López-Salinas ◽  
Yoshio Ono ◽  
Eiichi Suzuki
Keyword(s):  
Exchange Reaction ◽  
Benzyl Chloride ◽  
Reaction Rate ◽  
Alkyl Halides ◽  
Butyl Chloride ◽  
Butyl Bromide ◽  
Catalytic Behavior ◽  
Interlayer Region ◽  
Halide Exchange ◽  
Complex Anions

ABSTRACTTwo types of synthetic hydrotalcite-like [Mg6Al2(OH)16 ][An−%D;2/n (HT) were prepared where A = Cl− anions (Cl-HT), and NiC42− complex anions (NiCl-HT), in order to examine: (1) the reactivity of Cl− anion (or ligand) towards alkyl halides and (2) their catalytic behavior in the Finkelstein reaction. For instance, 0.4 g of NiCl-HT (Cl−: 1.41 mmol) suspended in 20 cm3 of toluene with 14.1 mmol of butyl bromide at 373 K yielded 42 % butyl chloride after 15 min of reaction. In comparison, NiCl4(Et4N)2 (precursor to prepare NiCl-HT) yielded at the same conditions only 2.4 % of butyl chloride. This indicates a great mobility of Cl− in the interlayer region of HTs. The reaction rate is greatly accelerated using DMF instead of toluene and butanol totally suppressed it. This is consistent with a SN2 mechanism. The halide-exchange reaction between benzyl chloride and butyl bromide is catalyzed by both Cl-HT and NiCl-HT.

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