DAT (Dental Admission Test) Organic Chemistry Syllabus

Organic Chemistry syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Organic Chemistry in DAT (Dental Admission Test), not a summary of it.

1. 1

   Structure, Bonding, and Nomenclature

   4 topics

   • Hybridization and Bonding
     • sp, sp2, sp3 hybridization
     • Sigma and pi bonds
   • Functional Groups
     • Identification of major functional groups
     • Relative reactivity and priority
   • IUPAC Nomenclature
     • Naming alkanes, alkenes, alkynes
     • Naming substituted and functionalized compounds
   • Resonance and Acidity
     • Resonance structures and stability
     • Acidity and basicity of organic compounds
2. 2

   Stereochemistry

   4 topics

   • Isomerism
     • Constitutional vs stereoisomers
     • Cis-trans and E/Z isomers
   • Chirality
     • Enantiomers and diastereomers
     • R/S configuration assignment
   • Conformational Analysis
     • Newman projections
     • Chair conformations of cyclohexane
   • Optical Activity
     • Specific rotation and racemic mixtures
3. 3

   Reaction Mechanisms

   4 topics

   • Substitution Reactions
     • SN1 and SN2 mechanisms
     • Effects of substrate, nucleophile, and solvent
   • Elimination Reactions
     • E1 and E2 mechanisms
     • Zaitsev and Hofmann products
   • Addition Reactions
     • Markovnikov and anti-Markovnikov addition
     • Electrophilic addition to alkenes
   • Reaction Intermediates
     • Carbocations, carbanions, free radicals
     • Stability and rearrangements
4. 4

   Reactions by Functional Class

   4 topics

   • Alkenes and Alkynes
     • Hydrogenation and halogenation
     • Hydration and oxidation
   • Alcohols and Ethers
     • Oxidation of alcohols
     • Williamson ether synthesis
   • Carbonyl Chemistry
     • Aldehydes and ketones: nucleophilic addition
     • Carboxylic acids and derivatives
   • Aromatic Compounds
     • Electrophilic aromatic substitution
     • Directing effects of substituents
5. 5

   Synthesis and Spectroscopy

   3 topics

   • Multistep Synthesis
     • Retrosynthetic analysis
     • Common synthetic routes
   • Spectroscopic Identification
     • IR spectroscopy
     • NMR (proton and carbon)
     • Mass spectrometry basics
   • Laboratory Techniques
     • Distillation and extraction
     • Chromatography

Organic Chemistry flashcards for DAT (Dental Admission Test)

25 of 62 cards from the Organic Chemistry deck — real questions with worked answers.

1. What hybridization, geometry, and bond angle correspond to a carbon bonded to four single bonds?

   sp3 hybridization, tetrahedral geometry, 109.5 degree bond angles.

2. What hybridization and bond angle does a carbon in a C=C double bond have?

   sp2 hybridization, trigonal planar, ~120 degree bond angles (one sigma + one pi bond).

3. Describe the bonding in a carbon-carbon triple bond.

   sp hybridized carbons, linear (180 degrees), one sigma bond plus two pi bonds.

4. How do sigma and pi bonds differ in their orbital overlap?

   Sigma bonds form by head-on (end-to-end) overlap along the internuclear axis; pi bonds form by side-on overlap of parallel p orbitals above and below the axis.

5. As s-character increases (sp3 to sp2 to sp), how do bond length and bond strength change?

   Bond length decreases and bond strength increases; electronegativity of the carbon also increases.

6. What is the functional group of an aldehyde versus a ketone?

   Aldehyde: carbonyl (C=O) with at least one H attached (RCHO, terminal). Ketone: carbonyl bonded to two carbons (RCOR').

7. Identify the functional groups: carboxylic acid, ester, amide.

   Carboxylic acid: -COOH. Ester: -COOR. Amide: -CONR2 (carbonyl bonded to nitrogen).

8. What distinguishes an alcohol, an ether, and a thiol by functional group?

   Alcohol: -OH on carbon. Ether: R-O-R (oxygen between two carbons). Thiol: -SH.

9. What is the general carbonyl reactivity order toward nucleophilic addition among aldehydes, ketones, and acid chlorides?

   Acid chloride > aldehyde > ketone (more substitution/electronics make ketones least reactive due to steric and electron-donating alkyl groups).

10. In IUPAC nomenclature, how do you choose the parent chain?

    Select the longest continuous carbon chain that contains the principal (highest-priority) functional group, giving it the lowest locant numbering.

11. Rank these suffix priorities (highest to lowest) for IUPAC naming: alcohol, carboxylic acid, ketone, aldehyde.

    Carboxylic acid > aldehyde > ketone > alcohol.

12. What suffix is used for an alkene, an alkyne, and an alcohol in IUPAC names?

    Alkene: -ene; alkyne: -yne; alcohol: -ol.

13. How are substituents ordered and numbered in an IUPAC name?

    Listed alphabetically as prefixes; the chain is numbered to give the lowest set of locants to the principal group first, then substituents.

14. What three conditions are required for a molecule to exhibit resonance?

    A continuous overlap of p orbitals (conjugation): adjacent pi bonds, lone pairs, or empty/radical p orbitals; only electrons move, not atoms; same total charge and number of paired/unpaired electrons.

15. What makes a resonance structure more stable (more contributing)?

    More covalent bonds/full octets, negative charge on the most electronegative atom, positive charge on the least electronegative atom, and minimal charge separation.

16. State the four main factors determining acidity (ARIO/CARDIO-type analysis) of a proton.

    Stability of the conjugate base, determined by: Atom (size/electronegativity), Resonance, Induction, and Orbital hybridization (more s-character = more acidic).

17. Why is a carboxylic acid much more acidic than an alcohol?

    The carboxylate conjugate base is resonance-stabilized over two equivalent oxygens, whereas an alkoxide is not, so carboxylic acids lose H+ much more readily.

18. How does electron-withdrawing group substitution affect acid strength via induction?

    Electron-withdrawing groups (e.g., halogens) stabilize the conjugate base by dispersing negative charge, increasing acidity; the effect weakens with distance.

19. Define constitutional (structural) isomers.

    Compounds with the same molecular formula but different connectivity (different order of atom attachment).

20. Distinguish enantiomers from diastereomers.

    Enantiomers are non-superimposable mirror images (all stereocenters inverted); diastereomers are stereoisomers that are not mirror images (some but not all stereocenters differ), including cis/trans isomers.

21. What are meso compounds?

    Molecules containing stereocenters but possessing an internal plane of symmetry, making them achiral (optically inactive) despite having chiral centers.

22. What is the maximum number of stereoisomers for a molecule with n stereocenters?

    2^n (fewer if meso forms or symmetry exist).

23. Define a chiral center (stereocenter) and the requirement for chirality.

    A chiral center is a carbon bonded to four different groups. A molecule is chiral if it is non-superimposable on its mirror image (typically lacks an internal plane of symmetry).

24. State the steps for assigning R/S configuration.

    Assign CIP priorities (1-4) by atomic number; orient lowest priority (4) away from viewer; if 1->2->3 is clockwise it is R, counterclockwise it is S (reverse if lowest priority points toward you).

25. In Fischer projections, what do horizontal and vertical lines represent?

    Horizontal lines point toward the viewer (out of the page); vertical lines point away from the viewer (into the page).

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