Why CCl3- anion is more stable than C6H5CH2-? I think the only possibility is by comparing the -I effect of Cl and Phenyl group. Generally we can see the possibility of negative charge dispersion on benzene ring making it more stable. I am confused. Kindly help.

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane