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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:
i wanted the glycol properties and its chemical reactions n preparation
how to determine the percentage of association or dissociation in a solution?
what is the interstitial relationship between carbon and boron?
CALCULATE THE MOMENTUM OF APARTICLEWHICH HAS WAVELENGTH OF 2A
curd formation in soya milk
The spectrum of He is expected to be similar to: (1) H (2) Li + (3) Na (4) He + Ans: Li +
Fe(atomic number = 26) atom has the electronic arrangement: (1) 2, 8, 8, 8 (2) 2, 8, 16 (3) 2, 8,14, 2 (4) 2, 8, 12, 4 Ans: 2, 8,14, 2
HYDROGEN Hydrogen is the natural element in the Universe and is a major constituent of stars. It is relatively much less common on Earth but nevertheless forms nearly 1% by mass
Methane (CH4), or natural gas, is commonly used all over the world as a source of energy and fuel. Many homes in the United States combust methane to generate heat for hot water he
Which of the following sets is possible for quantum numbers : (1) n=4, l=3, m= -2 , s=0 (2) n=4, l=4, m= +2 , s=1/2 (3) n=4, l=3, m= -2 , s=+1/2 (4)
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