[ttuankiet2005]

Can anybody help me?
When (R)-2-bromobutane reacts with KOH/ancol/heat.We suppose that the reaction will occur two mechanisms with the rate:E1 is 40%,E2 is 60%. The question is that how many percentages of  E and Z-butene-2 are created when the reaction is ended.And,how many percentages of every type is created?
Is the question right or wrong.? And can butene-1 be created? If it is created,how many percentages is it created?
Thanks a lot.

[Donphil07]

Chao ban, rat kho de noi duoc nguyen tac chung chua phan ung khu E1 va E2 vi dieu do con phu thuoc vao chat ban dau ma ban mang di phan ung. Ti le phan tram do phai duoc kiem tra bang thuc nghiem, tuy nhien ban van co the du doan nhu sau, la mot halogenua ankyl bac 2 thi xay ra phan ung khu E2 nhieu hon vi ion carbanion sinh ra trong truong hop nay la bac 2 khong ben lam, ma neu khu E2 thi thi halogen va hirdo phai lap thanh mot goc  180, va tuy theo cau hing chat ban dau, ban se biet no la cis hay trans hoac E hay Z. Con la halogenua alkyl bac 3 thi phan ung khu E1 se uu tien hon. trong truong hop nay phu thuoc rat nhieu vao cau hinh chat ban dau. Con neu la halogenua ankyl bac 1, phan ung the se chiem uu the. Hoa hoc la duu vao ly thuyet, tuy nhien ly thuyet chi huong dan ban di, con thuc nhiem moi la cai chinh xac de chung minh. Chao!

[Borek]

Please read forum rules. Point 6.

[AWK]

Read this presentation:
http://www.chem.wwu.edu/pavia/chap9a.ppt

moreover
http://faculty.salisbury.edu/~momitchell/e2_rxn_of_2-bromobutane.htm