Interpretation: The hydrogen bond acceptor (A), hydrogen bond donor (D) or both (D/A) should be indicated on the
Concept introduction:
A parent DNA molecule consists of two poly
A base is nitrogen containing heterocyclic compound which is found in DNA and RNA.
There are mainly five nitrogen bases.
- (1) Adenine
- (2) Guanine
- (3) Cytosine
- (4) Thymine
- (5) Uracil
Hydrogen bond is a type of attractive (dipole-dipole) interaction between an electronegative atom and a hydrogen atom bonded to another electronegative atom.
In DNA, hydrogen bonding is the chemical interaction that underlies and connects the base pairing. The DNA hydrogen bonds are responsible for holding together the double helix structure.
Enol is a tautomer which exhibiting a special type of functional isomerism namely tautomerism.
Tautomerism is a special type of functional isomerism in which isomers are in dynamic equilibrium with each other.
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Organic Chemistry (8th Edition)
- Consider the synthetic sequence shown. Deduce and draw the structures of organic compounds A and B. Omit all byproduc HBr Mg, H₂O ROOR ether Draw product A. product A product B Draw product B. Mgarrow_forward1. Rank the following according to increasing reactivity (1 - least reactive, 4 - most reactive in a nucleophilic acyl substitution reaction. Briefly explain your answer: .CI H3C H3C H3C H3C HO, Rank Explanationarrow_forward4. The following questions concern ethyl acetate, a common laboratory solvent and key ingredient in nail polish remover. a. Draw the stabilizing resonance interaction that lessens the electrophilicity of the carbonyl carbon. H- H Et b. Draw the hyperconjugation interaction that lessens the electrophilicity of the carbonyl carbon below. H- Et c. Which has the more electrophilic carbonyl carbon, ethyl acetate or phenyl acetate? Explain. io VS. ethyl acetate phenyl acetatearrow_forward
- Supply a reagent or sequence of reagents that will make the starting product into the final product in each of the following two questions. H H.arrow_forwardUse the appropriate reagent used in the reaction. (d),(e) please!!arrow_forwardComplete the curved arrow mechanism of the following double elimination reaction when 2,2-dichloro-3,3-dimethylbutane is treated with two equivalents of sodium amide and heated in mineral oil. A.) Use three curved arrows to show the elimination of the first hydrogen chloride. B.) Use three curved arrows to show the elimination of the second hydrogen chloride. C.) Complete the structure of the organic product formed from the double elimination. The ammonia and chloride ion formed in step 1 is not drawn for clarity.arrow_forward
- Click the "draw structure" button to activate the drawing utility. Draw one of the organic products formed in the following reaction sequence. [1] Ph3P [2] BuLi [3] H. draw structure ...arrow_forward1.Provide a mechanism for the following transformation. Use curved arrows to represent electron movement. (Picture goes with question 1) 2. Draw resonance structures of anisole or the intermediate in the above reaction to demonstrate why the methoxy group is an o,p-director.arrow_forwardList in order of increasing nucleophilicityarrow_forward
- A B C 7. a) For the following synthetic route, Draw the product and reagent structures for A-G. Problem continued on next page. E H A major product F G CH3 TSCI pyridine D E F B C 1) BH3. THF 2) H₂O₂, NaOH D *NOTE: each product is formed as a racemic mixture Garrow_forwardDraw the curved arrow(s) to depict the formation of the keto form of an enolate ion via a strong base, B. Complete the resonance structures of the enolate anion\'s keto and enolate forms with bonds, charges, and nonbonding electron pairs. Use curved arrows to show how the keto form resonates to the enolate form.arrow_forwarddraw an efficient synthesis strategy and show all products..arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning