Organic Chemistry Answers

chemical equation for the reaction of Ethynylcyclohexane + [1] BH3, [2] H2O2, OH-

Stereochemistry of ethynylcyclohexane + excess HBr

structure of the major products of ethynylcyclohexane + excess HBr with proper configuration

Chemical equation for the reaction of ethynylcyclohexane + excess HBr

Discuss the protection and deprotection of amino group of an amino acid by Cbz and 

Boc groups. 

State the chemical difference between-OH in alkanols and OH in inorganic base

explain the greater bond energy of N = N as compared to C = C

In general, alkanes adopt their staggered conformations preferentially to their eclipse conformations in order to minimize what type of molecular strain?

The enthalpy of formation of NH3(g) as per the following reaction is -46.11 kJ/mol

at 298 K.

Calculate the value of enthalpy of formation of NH3(g) at 100 oC. The p C

values are given as: N2(g) = 29.12; H2(g) = 28.82; NH3(g) = 35.06. Assume the

given heat capacity values to be temperature independent in the range.

Chitosan is derived from the shells of crustaceans. it is only soluble in an aqueous acidic medium but not in organic solvents. When reacted with phthalic anhydride, it forms an amide. The product is no longer soluble in the aqueous medium but now is soluble in organic solvents. 

a) Draw the product of the reaction between chitosan and phthalic anhydride.

b) Briefly explain the behaviour change in solubility of the starting material and the final product.