2017年4月23日 · I've been told that OTs O T s is a good leaving group for substitution reactions, but I'm not sure how it works or why it is a good leaving group. Can someone please explain? Ts T s comes from Toluenesulfonyl chloride, and when the TsX− T s X − ion replaces and H in an alcohol, it becomes an OTs O T s group.

2012年11月19日 · I am trying to figure out the configuration for this chiral carbon to answer a homework question, however they arbitrarily include a "D" group as shown in the image. My guess is that it is some hig...

2015年1月31日 · Tosyl chloride is used to make a hydroxyl group into a better leaving group. However, when the reaction of tosyl chloride and an alcohol occurs, a weak base such as pyridine should be used. Why?

2016年3月11日 · Why do the tosylation and mesylation of an alcohol proceed via different mechanisms? More specifically, In tosylation, the lone pair of the alcohol attacks the sulfur in TsCl, but why does it no...

2021年4月6日 · Define protective? There are few oxide-forming metals that yield a robust, self-limiting oxide layer. There are some metals that don't oxidize at STP. Then there is everything in between. Much of the reason is the kinetics of moving oxygen to the oxide-metal interface, or metal through the oxide to the surface. Growing silicon dioxide (a self-limiting reaction at STP) requires using steam as ...

It can not be alkaline because the water is not really alkaline, more like neutral. But dilution in an alkaline solvent will easily make the solution alkaline. EDIT: seems my answer was not considered an answer. Well since the question is composed out of more than 1 question... Using water, you won't be able to get past aprox 7 PH. Using an …

2015年6月18日 · When sodium chloride dissolves in water to make a saturated solution there is a 2.5 per cent reduction in volume. One would never notice that in a beaker. Even in an ordinary flask it would be barely perceptible. However, if a volumetric flask is available from the chemistry laboratory, the volume change will be noticeable in the narrow neck. It is essential to remove all air bubbles from the ...

The OP said it more clearly: the freezing point of salt water is lower than the freezing point of pure water. Saying that the melting point of ice cubes changes when adding salt is a bit strange because we still have pure water in the ice cube. It is the melted water that is no longer pure.

2016年1月20日 · There are more factors to consider when determining the true voltage of the cell such as the development of overpotentials. 'In electrochemistry, overpotential is the potential difference (voltage) between a half reactions thermodynamically determined reduction potential and the potential at which the redox event is experimentally observed. In a galvanic cell overpotential means less energy is ...

2014年7月20日 · I was told in my organic chemistry course that SN1 S N 1 and SN2 S N 2 reactions did not occur at sp2 sp 2 centres. When I asked why, I was not given a satisfactory explanation. For SN2 S N 2 it was suggested that the reaction could not proceed with inversion of configuration, as this would disrupt the orbital overlap causing the π π bond. I couldn't find any explanation in Clayden's Organic ...