21. Rank the aromaticities of the following compounds from most stable to least stable.
(i) thiophene (ii) benzene (iii) pyrrole (iv) furan
(A) ii>i>iii >iv
(B) ii>iv>iii>i
(C) ii>iv>i>iii
(D) ii>iii>iv>i
(E) iv>ii>i>iii
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統計: A(0), B(0), C(0), D(1), E(0) #3224475
統計: A(0), B(0), C(0), D(1), E(0) #3224475