The following processes result in a stronger polystyrene polymer. Explain why in each case. a. addition of catalyst to form syndiotactic polystyrene b. addition of 1,3-butadiene and sulfur c. producing long chains of polystyrene d. addition of a catal (a) What ...
Hydrothermal liquefaction of microalgae has attracted great attention in recent decades [14]. Previous studies had investigated the effect of reaction temperature, retention time, solid/liquid ratio and catalyst on bio-oil yield from hydrothermal liquefaction of various microalgae [3], [15], [16], ...
a) A normal (straight-chain) alkane b) A cycloakane c) A cycloakene d) Benzene e) Toluene Organic Reactions: There exist several classes of organic compounds and these compounds show different reactions toward different reagent...
13 Mechanistically, the cascade is initiated by the nucleophilic addition of a S-nucleophile onto a Michael acceptor playing the role of RC donor. Interestingly, HBF4 proved the best catalyst among a variety of Lewis and Brønsted acids explored, such as In(OTf)3, Bi(OTf)3, BF3·OEt2, ...
aSome talked of jobs they already had,others talked of jobs they would get. 一些他们已经有的谈话工作,其他谈话工作他们将得到。[translate] aPlease draw a small mouth. 请画一张小嘴。[translate] aThe surface Zr concentration of this catalyst is 1.7%. 这种催化剂的表面锆含量是1.7%。[translate]...
When thinking about what a mechanism might look like, the first thing to note is that we are using a strong base (NaOH). That begs a question: what’s the most acidic proton here? Hint: it’s not the C-H attached to the aldehyde!(that would result in an acyl anion, which is not...
Karstedt4type Pt catalyst is a very reactive silicone-miscible Pt(II) complex in common use for thermal processing of silicone release coating agents. It is necessary to include an inhibitor that slows the curing reaction enough at ambient temperatures to permit coating5; useful inhibitors are vola...
As a powerful strategy for addressing this intrinsic problem, catalyst-directed diastereo- divergence would be much sought after. Impressive progress has been made in the development of diastereodivergent asymmetric catalysis for carbon–carbon and carbon-heteroatom bond- forming reactions2–32. However,...
Examples of chemical reactions:Chemical reactions are processes in which a substance is transformed into another substance of a different form. Some common examples of chemical reactions are the reaction of iron and oxygen during the formation of rust, digestion of food we eat,...
n(CH2 = CH2)⟶T,P,Catalyst — (CH2−CH2)n — The active center can be formed as a result of various mechanisms, free radicals, ionic, or an organometallic complex. In the most common type of chain growth polymerization, a free radical molecule is generated and its presence...