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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:
what are the 4 unique properties of colloiods
my question is sodium carbonate is widely used in the manufacture of products such as glass, bread, water softeners and soaps. most sodium carbonate is produced industrially using
polymers based upon availabilty
Physical properties of Benzaldehyde (a) It is a colourless oily liquid. The boiling point of it is 179° C. (b) Benzaldehyde has smell of bitter almonds. (c) Benzaldehyde
Describe a method that could be used to separate the components of the following a) Sand and iron filings b) Sawdust and lead pellets c) Salt and glass particles d) Silt (water and
What is the principle of determining acid insoluble ash content of flour
Q. Explain scale formation and sludge formation in boilers. How are they formed? Ans Boilers are used for steam generation. When hard water is evaporated, progressively
The set of quantum numbers n= 3, l=0, m=0, s= -1/2 belongs to the element: (1) Mg (2) Na (3) Ne (4) F Ans: Mg
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what is the interstitial relationship between carbon and boron?
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