Write the IUPAC substitutive name of the major product when 2-methylbut-1-ene reacts with: a) HCl b) HBr in the presence of peroxides c) H2O/ H2SO4 (dilute sulfuric acid) d) BH3-THF followed by basic hydrogen peroxide. e) Chlorine in water. f) Bromine in carbon tetrachloride (an inert solvent). g) H2 in the presence of a metal catalyst.

Answer and Explanation:

The IUPAC substitutive name of the major product when 2-methylbut-1-ene reacts are as follows

a) HCl = 2-chloro-2-methylbutane

b) HBr in the presence of peroxides =  1-bromo-2-methylbutane

c) H2O/ H2SO4 (dilute sulfuric acid)  = 2-methylbutane-1,2-diol

d)BH3-THF followed by basic hydrogen peroxide =  2-methylbutan-1-ol

e) Chlorine in water =  2-chloro-2-methylbut -1 -ol

f) Bromine in carbon tetrachloride =  1,2- dibromo-2-methybutane

g) H2 in the presence of a metal catalys = isopentane or 2- methyl butane

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"