Organic Chemistry – Part I

Curriculum guideline

Effective Date:
Course
Discontinued
No
Course code
CHEM 2321
Descriptive
Organic Chemistry – Part I
Department
Chemistry
Faculty
Science and Technology
Credits
5.00
Start date
End term
Not Specified
PLAR
No
Semester length
15 weeks
Max class size
36
Course designation
None
Industry designation
None
Contact hours

Lecture: 4 hours/week

and

Lab: 3 hours/week

Method(s) of instruction
Lecture
Lab
Learning activities

Possible learning activities include lecture, group work, case studies, in-class assignments and analytical, synthetic, and team-based activities.

Course description
This course is the first in a two-course organic chemistry sequence. Topics include the structure and nomenclature of functional groups, chemical bonding, conformations of alkanes and cycloalkanes, chirality and stereochemistry, and acid-base behaviour in organic chemistry. The course also covers infrared spectroscopy, ultraviolet-visible absorption spectroscopy, alkyl halides and their synthetic equivalents, alkenes, alkynes, alcohols, ethers, and epoxides.
Course content

Review of Chemical Bonding

  • Types of chemical bonds: covalent, ionic, polar covalent
  • Bonding and molecular shape theories: Lewis, molecular orbital, valence bond, valence shell electron pair repulsion
  • Atom hybridization
  • Dipole moment
  • Intermolecular forces and resulting properties

Structure Representation

  • Functional groups: acyl halide, alcohol, aldehyde, alkene, alkyl halide, alkyne, amide, amine, anhydride, arene, carboxylic acid, ester, ether, ketone, sulfide, thiol 
  • Bond-line structures
  • Resonance structures
  • Formal charges
  • Resonance hybrid
  • Delocalized electrons
  • Curved arrows

Acids and Bases in Organic Chemistry

  • Bronsted-Lowry and Lewis Acid/Base theories
  • Quantifying acidity with Ka and pKa
  • Acidity as a function of conjugate base structure
  • Organic acid/base equilibria

Alkanes and Cycloalkanes

  • Bonding
  • Naming
  • Conformational analysis and potential energy
  • Newman projections
  • Torsional strain
  • Ring strain
  • Cyclohexane chair and boat forms
  • 1,3-diaxial interactions
  • Ring flip
  • Mono- and multi-substituted cyclohexanes

Introduction to IR and UV-Vis Spectroscopies

  • Physical principles
  • Colour
  • Spectra interpretation

Stereoisomerism

  • Constitutional isomers and stereoisomers
  • Chirality
  • Chiral carbon
  • Enantiomers and diastereomers
  • Meso compounds
  • Cahn–Ingold–Prelog (R/S naming) system
  • Fischer projections
  • Optical activity and polarimetry
  • Enantiomeric excess and racemic mixtures
  • E/Z alkene naming system

Organic Reactivity and Mechanisms

  • Bond cleavage
  • Enthalpy, Gibbs energy, and thermodynamics
  • Reaction kinetics
  • Potential energy plots
  • Nucleophiles and electrophiles
  • Common curved arrow patterns
  • Carbocation stability and rearrangement
  • Hyperconjugation

Substitution and Elimination Reactions (Alkyl Halides and Synthetic Equivalents)

  • Alkyl halide bonding
  • Alkyl halide naming
  • Primary to quaternary carbon
  • Mechanisms: SN2, SN1, E2, E1
  • Polarizability and nucleophile strength
  • Reagents: acetate, alcohols, tert-butoxide, cyanide, ethoxide, halides, hydride, hydroxide, methoxide, sulfides, thiols, water
  • Leaving groups: halides, mesylate, tosylate, triflate
  • Protic and aprotic solvents
  • Reaction regiochemistry
  • Reaction stereochemistry
  • Alkene potential energy
  • Zaitsev's Rule
  • Zaitsev/Hofmann products
  • Alcohol dehydration
  • Retrosynthetic analysis

Alkene Addition Reactions

  • Alkene bonding
  • Alkene naming
  • Alkene relative potential energy
  • Alkenes as nucleophiles
  • Markovnikov's Rule
  • Markovnikov and anti-Markovnikov hydrohalogenation
  • Acid-catalyzed hydration
  • Hydroboration–oxidation
  • Catalytic hydrogenation
  • Halogenation
  • Halohydrin reaction
  • Dihydroxylation via epoxide
  • Dihydroxylation with osmium tetroxide/potassium permanganate
  • Ozonolysis
  • Multi-step synthesis

Alkynes

  • Bonding
  • Naming
  • Alkyne synthesis with azide
  • Addition of HX
  • Acid-catalyzed hydration
  • Hydroboration-oxidation
  • Halogenation
  • Ozonolysis
  • Alkylation
  • Hydrogenation
  • Dissolving metal reduction
  • Partial hydrogenation with poisoned catalyst
  • Alkane radical halogenation in synthesis

Alcohols

  • Bonding
  • Naming
  • Acidity and physical properties
  • Halogenation with HX
  • Reactions with: sulfonyl chloride, thionyl chloride, phosphorus tribromide
  • Stereoselective nucleophilic substitution in synthesis

Ethers

  • Bonding
  • Naming
  • Ether cleavage with strong acid
  • Williamson Ether Synthesis
  • Epoxide synthesis from alkenes
  • Acidic and basic epoxide ring-opening reactions

Lab Experiment Examples

  • Simple and fractional distillation
  • Chromatography (gas and thin-layer)
  • Melting point determination
  • Recrystallization
  • Extraction and purification of impure organic compounds
  • Isolation of eugenol and eugenol acetate from oil of cloves
  • Extraction of caffeine from tea leaves
  • Synthesis of 2-chloro-2-methylbutane
  • Independent extraction and purification
Learning outcomes

Upon successful completion of this course, students will be able to:

  • draw and name the identified organic functional groups;
  • state the IUPAC name (or the common name, if one exists) from the structure of an organic compound containing a functional group identified under Course Content;
  • draw any organic compound containing an identified functional group using a bond-line structure, given either its IUPAC or common name;
  • identify bonding characteristics of organic molecules, including molecular shape, bond angle, hybridization, molecular orbital count and symmetry type;
  • draw structures of all possible isomers and describe each isomer from the molecular formula of an organic compound;
  • draw all relevant resonance structures and a resonance hybrid for an organic compound and describe the significance of each resonance structure to the hybrid;
  • list the intermolecular forces that apply to a molecule, and predict the physical properties that result from those forces;
  • predict the relative acidity and the approximate value of the acid ionization constant (Ka/pKa) of a compound given its molecular structure;
  • identify Lewis acids and Lewis bases;
  • rank compounds, or sites on a single compound, in order of relative acidity;
  • draw any alkane conformation with a Newman projection;
  • draw mono-/multi-substituted cyclohexanes in all relevant conformations, indicating axial/equatorial bonds and 1,3-diaxial interactions;
  • describe ring strain in cycloalkanes from cyclopropane to cyclohexane;
  • describe the factors that affect signal intensity, wavenumber, and signal shape in an infrared (IR) spectrum;
  • describe the factors that affect the absorption maximum location in an ultraviolet-visible absorption (UV-Vis) spectrum;
  • determine the functional groups present given the IR spectrum of an unknown compound;
  • identify the presence of a conjugated electron system;
  • identify the location of the absorption maximum from the UV-Vis spectrum of an unknown compound;
  • propose plausible bond-line structures for an unknown compound from its molecular formula and IR spectrum;
  • identify chiral objects and molecules;
  • identify chiral carbons and describe them using the R/S naming system;
  • draw molecules with one or more chiral carbons and communicate the correct stereochemistry using any of the following: Fischer projection, Newman projection, or wedge/dash bonds on a bond-line diagram;
  • identify a meso compound and draw its stereoisomers;
  • describe how to conduct an optical activity experiment using a polarimeter;
  • interpret the results of a polarimetry experiment in terms of observed rotation, specific rotation, optical purity, enantiomeric excess, and percent composition;
  • state the isomeric relationship between two compounds, the structures of which may be given in any identified projection/conformation/bond-line diagram;
  • provide examples of reactions that are one or more of: stereoselective, stereospecific, regioselective;
  • describe whether a reaction is under thermodynamic or kinetic control and how this affects the observed outcome;
  • sketch a potential energy plot for a reaction including reactants, intermediates, transition states, and products, given the mechanism;
  • describe relative reaction rates and the relative stability of chemical species using a potential energy plot;
  • rank the relative stabilities of a given a list of carbocations, including resonance-stabilized carbocations;
  • identify strong nucleophiles, weak nucleophiles, electrophiles, strong bases, and weak bases and describe their interactions by drawing reaction mechanisms with curved arrows;
  • derive and use the rate law equation to describe concentration effects on the rate of any identified reaction;
  • rank the relative stabilities of a given list of alkenes;
  • predict the major product of any identified organic reaction, given an appropriate chemical substrate and reagent(s);
  • state the required reagents to carry out any identified organic reaction given appropriate substrate(s) and product(s);
  • draw a complete identified reaction including substrate(s) and reagent(s), given a desired product;
  • describe the effect of changing the substrate and/or reagents on the thermodynamic and kinetic properties of any identified reaction;
  • draw a complete mechanism to rationalize the products formed for any identified reaction, including curved arrows, by-products, and intermediates, when given a full or partial reaction;
  • sketch a reasonable transition state for any mechanistic step in any identified reaction;
  • utilize retrosynthesis, as necessary, to design a multi-step synthesis of a target compound using identified reactions, given a desired target molecule and allowed starting materials;
  • write a multi-step chemical synthesis using forward reaction arrows, retrosynthesis arrows, or both, as appropriate.
Means of assessment

This is a letter-graded course. Assessment will be in accordance with the Douglas College Evaluation Policy. The instructor will present a course outline with specific evaluation criteria at the beginning of the semester. In this course, instructors may use a student’s record of attendance and/or level of active participation as part of the student’s graded performance. Evaluation will be based on the following:

Lab reports and lab quizzes/activities     25%
In-class participation 0-5%
Homework and/or in-class activities 0-25%
Tests (minimum of two) 20-35%
Final exam 30-40%
Total 100%

Notes:

A student who misses three or more laboratory experiments will earn a maximum grade of D in the course. If a student arrives late, impaired, unsafely attired or otherwise unprepared, they may be subject to a mark penalty and/or may not be allowed to perform the experiment at the discretion of the instructor. If a student is not permitted to perform the experiment, this absence is considered a missed lab.

A student who achieves less than 50% in either the lecture or lab portion of the course will earn a maximum grade of D in the course.

Textbook materials

Consult the Douglas College Bookstore for the latest required textbooks and materials. Example textbooks and materials may include:

  • Klein, D., Starkey, L. (current edition). Organic Chemistry. Wiley.
  • Douglas College. Chemistry 2321 Laboratory Manual.
  • Safety eyewear
  • Carbonless copy paper notebook
  • Lab coat
Prerequisites

CHEM 1110 with a minimum grade of C

Corequisites

None

Equivalencies

None

Which prerequisite