有機化學分子的結構特性與立體化學分析

📝 歷屆考古題

• 115年 hce_kmu 第17題
  How many stereogenic centers are there in Lovastatin (Mevacor®, a cholesterol-lowering drug)?
  查看 AI 詳解 →
• 115年 hce_kmu 第62題
  Which of the following terms best describes the pair of compounds shown below?
  查看 AI 詳解 →
• 115年 hce_kmu 第63題
  Rank the following in terms of nucleophilic strength: I. $\text{CH}_3\text{S}^-$ II. $\text{CH}_3\text{SH}$…
  查看 AI 詳解 →
• 115年 hce_kmu 第68題
  Which will be the major product when $N,N$-dimethylpropanamide is treated with $\text{LiAlH}_4$?
  查看 AI 詳解 →
• 115年 hce_kmu 第71題
  Under what condition would phenylalanine exist as in the following structure?
  查看 AI 詳解 →
• 115年 hce_kmu 第72題
  Rank the bold hydrogens for the following compounds from most acidic to least acidic.
  查看 AI 詳解 →
• 115年 hce_kmu 第73題
  Which will be the major product when trans-1-bromo-2-methylcyclohexane reacts with sodium isopropoxi…
  查看 AI 詳解 →
• 115年 hce_kmu 第74題
  Which conformation of trans-1-isopropyl-3-methylcyclohexane would be present in greatest amount at e…
  查看 AI 詳解 →
• 115年 hce_kmu 第75題
  Which of the following reagents can be used to convert cyclopentanol to cyclopentane?
  查看 AI 詳解 →
• 115年 hce_kmu 第76題
  When two carbenes collide, they immediately dimerize to give?
  查看 AI 詳解 →
• 115年 hce_kmu 第79題
  Which will be the major product when diethyl heptanedioate reacts with sodium ethoxide?
  查看 AI 詳解 →
• 115年 hce_kmu 第81題
  How many moles of carbon dioxide are generated when one mole of the compound shown below is treated…
  查看 AI 詳解 →
• 115年 hce_kmu 第83題
  How many enantiomer(s) can be drawn from $\text{CH}_3\text{CHClCHBrCH}_3$?
  查看 AI 詳解 →
• 115年 hce_kmu 第85題
  Which will be the major product of the following reaction?
  查看 AI 詳解 →
• 115年 hce_kmu 第86題
  Which will be the major product of the following reaction?
  查看 AI 詳解 →
• 114年 hce_kmu 第80題
  Peramivir has shown to be effective against the influenza B virus. What is the degree of unsaturatio…
  查看 AI 詳解 →
• 114年 hce_kmu 第81題
  Which of the following cycloalkenes would be expected to be stable?
  查看 AI 詳解 →
• 114年 hce_kmu 第82題
  What is the structural relationship of the following two compounds?
  查看 AI 詳解 →
• 114年 hce_kmu 第85題
  Given the compound as shown below: Which of the labeled H atoms (1-5) in the following molecule woul…
  查看 AI 詳解 →
• 114年 hce_kmu 第86題
  Which of the following compounds exhibits the highest stability?
  查看 AI 詳解 →
• 114年 hce_kmu 第89題
  Identify the major product of the reaction below.
  查看 AI 詳解 →
• 113年 hce_kmu 第61題
  Which of the following carbon atoms exhibits an oxidation state of +3?
  查看 AI 詳解 →
• 113年 hce_kmu 第88題
  Which of the following molecules is achiral?
  查看 AI 詳解 →
• 113年 hce_kmu 第89題
  Which of the following molecules possesses the strongest acidity?
  查看 AI 詳解 →
• 113年 hce_kmu 第90題
  What monomer(s) is/are needed to synthesize the polymer shown below? I. $\text{HOCH}_2\text{CH}_2\text{OH}$…
  查看 AI 詳解 →
• 112年 hce_kmu 第23題
  What is the product called after glycine and alanine undergo condensation reactions?
  查看 AI 詳解 →
• 112年 hce_kmu 第61題
  Which structure is not considered to have aromaticity?
  查看 AI 詳解 →
• 112年 hce_kmu 第74題
  How many chiral centers are in the following structure?
  查看 AI 詳解 →
• 112年 hce_kmu 第85題
  Nature rubber is a polymer derived from isoprene. What is the correct way to show the structure of r…
  查看 AI 詳解 →
• 112年 hce_kmu 第86題
  Which compound has the highest boiling point among the following structures?
  查看 AI 詳解 →

• 112年 hce_kmu 第87題
  What are the products of the following reaction?
  查看 AI 詳解 →
• 112年 hce_kmu 第90題
  What is the product of the transformation listed below?
  查看 AI 詳解 →
• 111年 hce_kmu 第82題
  Which of the labeled C-H bond is the weakest?
  查看 AI 詳解 →
• 111年 hce_kmu 第83題
  Which of the following alkenes generates the greatest heat upon hydrogenation?
  查看 AI 詳解 →
• 111年 hce_kmu 第84題
  What is the structural relationship of the following two compounds?
  查看 AI 詳解 →
• 111年 hce_kmu 第86題
  Which of following structures presents the most stable conformation of cis-1-ethyl-2-isopropylcycloh…
  查看 AI 詳解 →
• 111年 hce_kmu 第87題
  Determine the most acidic compound shown below.
  查看 AI 詳解 →
• 111年 hce_kmu 第88題
  Peramivir has shown to be effective against the influenza B virus. Rank following nitrogen atoms in…
  查看 AI 詳解 →
• 111年 hce_kmu 第89題
  Arrange the following arenes in the decreasing reactivity toward $HNO_3/H_2SO_4$. (a) PhH (b) PhCl (…
  查看 AI 詳解 →
• 111年 hce_kmu 第90題
  Which compound exhibits only two signals in its $^1H$ NMR spectrum, a triplet and a quintet?
  查看 AI 詳解 →
• 110年 hce_kmu 第18題
  Which of the following options best describes the relationship between the following two compounds?
  查看 AI 詳解 →
• 110年 hce_kmu 第23題
  How many asymmetric carbons are presented in the compound below?
  查看 AI 詳解 →
• 110年 hce_kmu 第75題
  What is the appropriate representation of the repeating unit of the following polymer?
  查看 AI 詳解 →
• 110年 hce_kmu 第76題
  Which of the following structures is the major form of the lysine at the $\text{pH} = 14$?
  查看 AI 詳解 →
• 110年 hce_kmu 第79題
  Please choose the most stable cation?
  查看 AI 詳解 →
• 110年 hce_kmu 第90題
  The students used salicylic acid and acetic anhydride to synthesize aspirin in the experiment of “Th…
  查看 AI 詳解 →
• 109年 hce_kmu 第19題
  Which of the following substrate is most likely to exhibit liquid crystalline behavior?
  查看 AI 詳解 →
• 109年 hce_kmu 第83題
  Above structure is the precursor of the Remdesivir (potential COVID−19 drug), which of the below sta…
  查看 AI 詳解 →
• 108年 hce_kmu 第19題
  Which of the following resonance structures is the most stable?
  查看 AI 詳解 →
• 108年 hce_kmu 第29題
  The structure of pentose is shown on the down figure. How many carbon atoms with chirality are there…
  查看 AI 詳解 →
• 108年 hce_kmu 第78題
  As shown below, compound IV can be prepared from reagents I, II, and III. Which of the following rea…
  查看 AI 詳解 →
• 108年 hce_kmu 第90題
  A student gave a molecule the following name: 2-methyl-4-t-butylpentane However, the teacher pointed…
  查看 AI 詳解 →
• 107年 hce_kmu 第18題
  How many chiral centers are in this molecule?
  查看 AI 詳解 →
• 107年 hce_kmu 第64題
  Of the following eleven compounds, how many of them have aromatic character?
  查看 AI 詳解 →
• 106年 hce_kmu 第72題
  Which of the following molecules is an optically active molecule?
  查看 AI 詳解 →
• 106年 hce_kmu 第73題
  The structure below is the repeating unit of a
  查看 AI 詳解 →
• 106年 hce_kmu 第74題
  Identify the products of the reaction of 3-octene with chlorine.…
  查看 AI 詳解 →