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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:
The power plants at Geysers use a dry steam cycle. The steam enters the turbine at 250 o C and 30 bars represented by the point 1 in the steam h-s diagram here below. At the outlet
why is NH4CL ADDED BEFOR NH4OH
Define the following observations: (i) Most of the known noble gas compounds are those of xenon. (ii) CIF3 exists but FCI 3 does not. (iii) Between the hydrides of elemen
You are given a sample block of an unknown metal. The block displaces 3.24 mL of water and has a mass of 62.5429 g. What is the density of the unknown metal? What is the metal?
how to balnce electrically.
The type of orbitals present in Fe is : (1) s (2) s and p (3) s, p and d ()s, p, d, and f Ans: s, p and d
What are the physical propeties of S block ?
What is the advantage of using a flame photometer instrument designed to operate with an internal standard ?
What does the HA and A- stand for in buffer solution equations? Ka=HA/A-
Nitration or Direct method The number of - NO 2 groups introduced in benzene nucleus relies upon the nature and concentration of the nitrating agent, temperature of nitration
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