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Solutions to Problems 31 (b) The δ⁺ carbon will attract the lone pair on the δ⁻ nitrogen of ammonia. At the same time, the δ⁻ oxygen will attract a δ⁺ hydrogen of ammonia. (c) A δ⁻ oxygen lone pair will bond to H+. (d) The ketone's carbon will attract the negatively charged carbon of the carbanion. (e) The lone pair on nitrogen will be attracted to the positively charged carbon. (f) No reaction. Butane has no polarized atoms; it is therefore not reactive toward charged or polarized species. Compare to Example 3 34. (a) CH₂ + in Section 2-2. CH₃ CH₃ :0: :ö:- (b) Like Example 4(a), except the electron-pair NH₃ donor is neutral, not negative. H Similar to Example 2, (c) except the donor is neutral, as in part (b). :0: :ö:- :CH₃ CH₃ (e) Like part (c) above. 35. Recall that condensed formulas tell you only what atoms are connected to what other atoms, not the real three-dimensional shape of a molecule. The longest chain is the chain with the most atoms, not necessarily the one drawn on a single horizontal line in these formulas. 5 4 3 (a) CH₃CH₂CHCH₃ 2,3-Dimethylpentane CH - CH₃ CH₃