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This cycloaddition reaction involves sixteen electrons; hence, it must be suprafacial on one component and antarafacial on the other. Thus, it must be a [14s + 2a] or a [14a + 2s] cycloaddition. The heptafulvene molecule is large enough that its p-electron system can twist without introducing too much strain or without losing too much p-electron overlap; hence, the cycloaddition is a [14a + 2s] process. In either case, the product has the following stereochemistry:
Q. Catalytic activity of metalloenzymes? Catalytic activity of metalloenzymes depends on the complex form in ability of a particular metal ion. One specific example is carbonic
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Q. Explain about Chemistry and Matter? Chemistry is the study of matter as well as the changes that it undergoes. Matter is anything which has mass and takes up space. Mas
Cereals Cereals or grains are the seeds of grasses and include the many species of wheat, rice, maize or corn, jowar, barley, ragi, bajra, rye and oats. Cereals account for
your HPLC system has efficiency 1500 theor. Plates, but baseline is very noisy. You have a choice either increase response time or decrease attenuation. what will you choose and wh
discuss in detail the basic principle and instrumentation involved in fluorimetry and phosphorimetry
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When the azimuthal quantum number has a value of l= l , the shape of the orbital is : (1) Unsymmetrical (2) Spherically symmetrical (3) Dumb-bell (4)Complicated Ans:
short note on vulcanization of rubber.
Give an example of a pseudo first order reaction. Write the IUPAC name of the following: (CH 3 ) 2 C=CHCOCH 3
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