Chlorides, higher

Silicon bromide, Si2Br6, 2 98 (See also Silicon tetrabromide) Silicon chlorides, higher, 1 42 Si2Cl6, 1 42 Si,Cl, 1 44... 

Analogously to the use of dicyanamide, the cyano imidamides 5 react with disulfur dichloride or sulfur dichloride to give 5-substituted l,3-dichloro-124,2,4.6-thiatriazines 6.46 The reaction of disulfur dichloride proceeds only in the presence of a tertiary base to accelerate the dismu-tation equilibrium of the sulfur chloride. Higher yields are obtained in the presence of two equivalents of tertiary amine. 

Keywords Higher-Coordinated Silyl Chlorides / Higher-Coordinated Silyl Triflates / Silyl Cations / Reactivity of Silyl Cations... 

Tables and isocorrosion charts are available to document experience with general, or uniform, corrosion in relatively pure chemicals at various temperatures and concentrations. An example is shown in Fig. 2. The selection of a material, or the proper test to evaluate a material, often includes more than consideration of uniform attack in pure chemicals. The presence of impurities can accelerate or retard general corrosion, e.g., chlorides (and some other halides) can cause pitting or SCC. Crevices due to the design or adherent deposits can be sites of attack, particularly in the presence of chlorides. Higher velocity of the corrodent can (a) reduce attack if deposits and the resulting crevice attack...

Freshwater sources, groundwater, and surface water reservoirs and streams usually contain less than 10 mg/dm chloride. Higher analysis results indicate contamination by industrial effluents (water softening, paper works, oil wells, galvanic industries), by sewage from hog farms or other agricultural or communal facilities by snow- or ice-melting road treatments. 

A4N sodium hydroxide solution is used to change the counter-ion on the resin from chloride (higher affinity anion) to hydroxide (lower affinity anion) for better retention of carboxylic acids. 

The gem-difluorination of a-(methylthio)acetophenones by reagent 2 is accelerated by the addition of zinc chloride, zinc bromide, or anhydrous iron(III) chloride. Higher yields were thus obtained than in the absence of additives (eq 5). ... 

---