問題詳情
47.Markovnikov’s rule “works” because:
(A)The most stable transition state is the one leading to the more substituted carbocation.
(B)The nucleophile adds during the second step of the ionic reaction.
(C)The electrophile adds to the less substituted end of the double bond.
(D)All of these are true.
(E)All of these are not true.
(A)The most stable transition state is the one leading to the more substituted carbocation.
(B)The nucleophile adds during the second step of the ionic reaction.
(C)The electrophile adds to the less substituted end of the double bond.
(D)All of these are true.
(E)All of these are not true.
參考答案
無參考答案
內容推薦
- An alkane with a molecular formula C6H14 reacts with chlorine in the presence of light and heat.
- Which of the following atoms is paramagnetic?(A)Cd (B)Tl1-(C)Nb1+ (D)Ni (E)Ru1+
- Rank the transition states which occur during the following reaction steps in order of increasing
- Thiols are alcohol analogs in which the oxygen has been replaced by sulfur (e.g., CH3SH). Given t
- Which of the following molecules has the highest bond order?(A)BN (B)CO (C)NO (D)Ne2 (E)F2
- Who characterized alpha, beta and gamma radiation?(A)Thomson (B)Einstein (C)Rutherford (D)Heisenb
- The activation energy(Eact) of a give reaction is unrelated to which of the following parameters?
- How many constitutional isomers are there for C5H11Br?(A)3 (B)7 (C)8 (D)10 (E)
- The approximate pKaof NH3 is 36; that of C2H5OH is From this information, which (if any) of t
- Which of the following statements is not true?(A)trans-1,3-dimethylcyclohexane is more stable tha
內容推薦
- Treatment of 2-methyl-2-butene with HBr in the presence of peroxide yields(A)A primary alkyl brom
- Which of the following is least able to serve as a nucleophile in a chemical reaction?(A)Br-(B)OH
- The strongest evidence for the formation of a bridged bromonium ion as an intermediate in the add
- A compound having a molecular formula of C20H36 is inert to catalytic hydrogenation. Which of the
- The bimolecular subsittution reactionCH3Br + OH- →CH3OH + Br-is represented by the kinetic equati
- The solvoysis reactions of optically active halides generally proceed with(A)Complete racemizatio
- Which of the following statements pertaining to an SN2 reaction are true?The rate of reaction i
- Which of the following phrases are not correctly associated with SN1 reactions?Rearrangements p
- Carboxylic acids exist in the vapor state as:(A)Monomeric species (B)Cyclic esters (C)Cyclic dime
- Which of the following statements is true concerning pKa?(A)The larger the pKavalue, the weaker t
- Referring to the following equilibrium (R=alkyl group) (A)K < 1 ; the equilibrium would lie th
- 如圖(十二)，圖上有B、C兩點 為圓的兩切線。若 將圓分成兩弧，且其中一弧的長為圓周長的1/10，則∠BPC的度數為何？(A)108(B)120(C)144(D)162
- (28~30)【題組】Why did Chief Seattle ask “Every part of the Earth is sacred to my people?”(A) Becaus
- 如圖(十六)，有兩全等的正三角形 ABC、DEF，且D、A 分別為 △ABC、△DEF 的重心。固定D 點，將 △DEF 逆時針旋轉，使得A 落在 上，如圖(十七)所示。求圖(十六)與圖(十七
- Which alkyne yields butanoic acid (CH3CH2CH2CO2H) as the only organic product upon treatment with
- 下列何者是 22x7 - 83x6 + 21x5 的因式？(A) 2x + 3(B) x2(11x - 7)(C) x4(11x - 3)(D) x6(2x + 7)
- Which of the following produces a significant amount of acetylide ion on reaction with acetylene?
- Hydrogenation of cyclohexene releases 120kJ/mol of heat. Which of the following most likely repre
- Arrange the following intermediates in order of decreasing basicity (strongest→weakest):(A)B >
- 【題組】What is the smoking iron horse?(A) The beasts.(B) The passing train.(C) The buffaloes.(D) Th
- 圖 ( 十三 ) 的長方體與下列選項中的立體圖形均是由邊長為1 公分的小正方體緊密堆砌而成。若下列有一立體圖形的表面積與圖 ( 十三 ) 的表面積相同，則此圖形為何？ (A) (B) (C
- (31~33) 【題組】What is the main idea of the article?(A) All work and no play makes Jack a dull boy.
- 【題組】Who may have the same idea with Chief Seattle?(A) Mr. Macron, “We can’t do nothing but still
- 【題組】What is trauma?(A) Parents who are prisoners.(B) A person who uses power to harm those who a
- 【題組】Which of the following is not true?(A) Sesame Street first started being on air in the late