Viết CTCT các ankin có tên sau: (1) iso-butylaxetilen, (2) metyl iso-propylaxetilen, (3) 3-metylpen-1-in,
Giải thích
(1) (CH3)2-CH-CH2-C≡CH
(2) CH3-C≡C-CH(CH3)2
(3) CH≡C-CH(CH3)-CH2-CH3
(4) CH3-C(CH3)2-C≡C-C(CH3)2-CH3
(5) 
(1) (CH3)2-CH-CH2-C≡CH
(2) CH3-C≡C-CH(CH3)2
(3) CH≡C-CH(CH3)-CH2-CH3
(4) CH3-C(CH3)2-C≡C-C(CH3)2-CH3
(5)