Question

Exercise 3-3 (a) Which C-C bond would break first, the bond in ethane or that in 2,2-dimethy pro (b) The hydroxyl radical, HO, is highly toxic by abstraction of hydrogen a biological molecules, fuelled by the strength of the O-H bond in H2O (Table 3-1); preferred product of attack of HO on 2-methylpropane and explain your answer.

the answer is

I'm confused why in part b the C-CH3 bond is broken instead of just the C-H. I thought the OH radical only wanted a hydrogen.

Answer 1

a Cus وبين nelichi cac bond would buak first, the hond in ername or that in 2,2 dincethylpwopene? CH f cocug - first as the lond dissoration enegy is 27 kcalmol less than hond dissociation energy for cu fly, in emand that is gokcal/mol Tue trydrony radical, Hol; is engrely louie by alestraction of Hatom rom biological molecules, fuelled ley tu strength of the oth houd in H₂O give the preferred. product of attack 240° ем 2- мач ер адаlасла і ала. 46.6 kulturel ng ke-Calmol The OH is not breaking ture C-CHg bond but the c-H bond ect the 300 tertiary ] Callion atom in Molecule unstead of Le bond at ior 20 Carbon. The hond reast so dissociation is broken. enegy for 3 Chis it CH₂-6 -CH-CH, TH₂O OW