The Claisen-Schmidt reaction is a type of condensation reaction that occurs between a ketone or aldehyde and an ester, leading to the formation of a beta-keto ester or a beta-diketone, respectively. This reaction is named after the German chemists, Rainer Ludwig Claisen and James Schmidt, who first described it in 1887.
One of the most commonly used variations of the Claisen-Schmidt reaction is the reaction between benzaldehyde and acetone, which results in the formation of 3,4-diphenyl-2-butanone, also known as diacetylbenzene. This reaction is an example of aldol condensation, as it involves the formation of a new carbon-carbon bond between the aldehyde group of benzaldehyde and the ketone group of acetone.
The reaction between benzaldehyde and acetone can be carried out in the presence of a base, such as sodium hydroxide or potassium hydroxide, to facilitate the elimination of water as a byproduct. The base also serves to deprotonate the aldehyde and ketone, making them more reactive towards each other. The reaction is typically carried out in a solvent, such as ethanol or water, and is usually heated to a temperature of around 80-100 degrees Celsius.
One of the main advantages of the Claisen-Schmidt reaction is its high yield, as it usually produces products in yields of up to 95%. This makes it an attractive synthetic method for the preparation of a variety of compounds, including pharmaceuticals, fragrances, and flavorings.
In conclusion, the Claisen-Schmidt reaction is a useful chemical transformation that allows the synthesis of various compounds, including 3,4-diphenyl-2-butanone, through the condensation of a ketone or aldehyde with an ester. Its high yield and versatility make it a valuable tool in the field of organic chemistry.
How to Give an Impromptu Speech (Public Speaking)
The important thing is to speak out loud. The advantage of extemporaneous speaking is that the speakers are able to speak in a more conversational tone by letting the cards guide them, but not dictate every word they say. Moreover, you cannot stand like a statue and deliver your speech. This helps your audience to remember it. In your public speaking class, most of your speeches will probably be delivered extemporaneously. Example, if you are doing a toast for a departing coworker, and you share the story of the first time you meet her, you can tie back by saying, that after that event, you knew that she was destined for big things and that she will be missed when she leaves.
What is a impromptu method?
We just speak without inhibitions. Reflecting back on your speech, you are probably thinking about what you could have done better. In situations that require you to make spontaneous talks, you are running out of time and you are expected to make the best impression and impact on others within a fraction of seconds. Stick to three main topics and keep the Power of 3 in mind. I speak for everyone when I say that we could always count on her to be there for any of us. You might talk about your friendship, his many former girlfriends, all of which you liked, his wife's mother and her facial mole, and the nasty creamed spinach that was served with dinner.
Effective Techniques for an Impromptu Speech
Following this, the student will conclude the speech by reiterating the prompt, thesis, and main arguments. This is what we call a unique perspective. Well, if your audience enjoys a bedtime story, it may work. All of a sudden, you are asked to give the minutes of the meeting. The most common formulation for the body of the speech is to explore two or three topic areas in greater depth. Some speakers enjoy the free-wheeling style of the extemporaneous speech but want the safety net of a manuscript speech.
The PREP Framework : An Easy Way to Give Excellent Impromptu Speeches
If you take your time and think about what you would like to say, you probably will never put your foot in your mouth again. When many words are on the page, the speakers will find themselves looking down at those words more frequently because they will need the help. This is a handy trick when you're facing a hard question or asked to discuss a topic with which you're unfamiliar. All this happens primarily because you are used to giving responses and reviews after thorough plannings and preparations. Moreover, the framework would provide a structure to your speech and you would feel prepared. Support or back up your case with evidence from research, facts, data, statistics, or the scriptures if you are giving a religious speech. He is a practicing U.
50 Topics for Impromptu Student Speeches
Answer: 1 Like any other speech, impromptu speech has three significant parts. Also, for any kind of academic speech writing, essay writing, etc. If they do look up at the audience, they often cannot find their place when the eye returns to the page. This is an educational activity and all feedback is welcome. Therefore, manuscript is a very difficult delivery method and not ideal.
