Introduction to CBE-2206Industrial Organic Chemistry 1 • Organic Chemistry-the chemistry of carbon compounds • CBE 2206-Industrial Organic Chemistry deals with understanding the basic principles of organic chemistry, and applying them to analytical instruments and simple industrial processes with a focus on sustainability Instructor Info. Prof. Paul A. Charpentier -Call me Paul pcharpen@uwo.ca Office Hours: CMLP 3333-Open, come anytime. Course Web page: OWL Text: “Organic Chemistry” Wade 9th Edition Course Outline- Prerequisites -Chemistry 1024A/B or Chemistry 1050 or the former Chemistry 1020 or 023. Open only to students registered in the Faculty of Engineering. Class Schedule • Monday →9:30-11:30 am, FNB 3210 • Thursday →10:30-11:30, SEB 2100 Course Materials / Lab Manuals Required Course Notes-On Brightspace Required Laboratory Manual-On Brightspace UWO Course Website Course materials such as course outline, schedules (deadlines), and announcements , etc. are posted on the Brightspace course website : Notices Students are responsible for regularly checking Brightspace. Evaluation Laboratory (and pre-labs) Mid-term exam (2 hrs) (tentative Oct. 27) Assignments Quizzes (4) Participation Final Examination-Dec 25 % 20 % Optional 15% 5% 35 % 100% Course Textbook L.G. Wade Jr., “Organic Chemistry”, 9th edition, Prentice-Hall, 2017. • Textbook-useful https://www.pearson.com/en-ca/subject-catalog/p/organicchemistry/P200000007007/9780135213728 Assignments Text problems will be assigned with dates given out, then solutions provided. Attendance →Attendance in all labs is mandatory. →On the recommendation of the Department concerned, and with the permission of the Dean, the student will be excluded from taking the regular examination in the course. Sickness • Talk to instructor if anything chronic that effects performance • For tests and labs get doctors note and bring to either the UG office in TEB 477 As Soon As Possible. • Services for Students with Disabilities (SSD) at 661-2111 x 82147 for any specific question regarding an accommodation. Lab Schedule CBE Students Section 2) Weds→ 1:30-4:30pm Section 3) Tues 9:30-12:30 Section 4) Friday → 9:30-12:30 Section 5) Thurs → 3:30-6:30 Section 6) Tues → 12:30-3:30 →All labs in SEB 1082 Lab Technician: tba Laboratories-Bench Scale 1) FRACTIONATION DISTILLATION AND ANALYSIS OF HYDROCARBONS USING GAS CHROMATOGRAPHY (GC) 2) PURIFICATION OF ORGANIC COMPOUNDS BY EXTRACTION AND RECRYSTALLIZATION 3) SN1 AND SN2 REACTIONS Lab 1- (3 weeks Lab, Labs on Thursday Sept. 21, Friday Sept 22, and Thurs Sept 28, Fri. Sept 29, Thurs Oct. 5) Lead TA and Marking: -Rasoul Salami Homecoming –Sept 23 Lab 2: “Purification of Organic Compounds by Extraction and Recrystallization” 2 week lab on Thurs Oct. 19, Fri. Oct. 20, Thurs, Oct. 26 and Friday Oct. 27 Lead TA and Marking: Johana Amaya Lab 3: “SN1 and SN2 Reactions” (2 week Lab) Starts Thursday Nov. 9, Fri. Nov. 10, Thurs Nov. 16, Fri. Nov. 17) Lead TA and Marking: Fatemeh Dodangeh No labs the week of Mon. Oct. 9 (Thanksgiving Holiday) and Mon. Oct. 30 (Fall Reading Week) Skills Learned in Labs • familiar with basic laboratory equipment (glassware, titration, heating units, etc.) • familiar with spectroscopic instrumentation (FTIR and UV) • familiar with chromatography (GC) • gain experience with basic laboratory techniques such as distillation, column chromatography, re-crystallization Labs-Safety →Labs will start week of September 18th. →Consult the lab schedule on OWL for the dates of particular experiments. →Students will form groups of 2 to perform the experiments. →Lab reports will be written up by both group members. →**You must have safety goggles and a laboratory coat or will not be allowed into the laboratory and will receive a mark of zero for that particular lab. →Students must read the lab manual and complete the pre-lab questions prior to attending the lab. 2) Students must attend all labs, turn in all laboratory reports, and achieve a passing grade in the laboratory component to pass this course. If you miss a lab for medical or compassionate reasons, you must notify the instructor immediately to make arrangements to make up the lab and provide adequate documentation for your absence. Failure to provide the adequate documentation will result in a mark of 0. CBE 2206 Course Description • This course deals with the fundamental principles governing the structure and reactivity of organic molecules. • Organic molecules form the basis of industrial chemical and environmental processes. • The laboratory section focuses on bench scale processing of organic chemical products, and the use of modern instruments for analysis of organic materials and monitoring of chemical processes. Final Exam Text Coverage Text: Wade 9th Edition BASIC CONCEPTS FOR ORGANIC CHEMISTRY Intro. and Review Ch. 1-All Structure and Properties Ch. 2-All Alkanes Ch. 3-All Chemical Reactions Ch. 4-All Stereochemistry Ch. 5: Sections 1-8, 10-13, 15,16 FUNCTIONAL GROUPS SECTION Alkyl Halides Ch. 6: Sections 1-14,16-21 Alkenes Ch. 7: 1-2, 4-11 Ch. 8: Sections 1-4, 8, 10, 12-13, 15b, 16 Alkynes Ch. 9 1-8 (except 9-7b), 9(a,b,d,e) 1.2 Principles of Atomic Structure Structure of the Atom Orbitals • Electrons have properties of both particles and waves • wave equation provides a probability plot of finding an electron at any particular place • orbital defn- region in space where an electron is likely to be found • think of electron in an orbital as being smeared to form a cloud • different types of orbitals with different sizes and shapes (s,p,d, f) • energy of electron determines which orbital type it is in → the shape of the cloud is the orbital where it’s density is highest at highest probability of finding electron 1s Atomic Orbital 2s Atomic Orbital 2p Atomic Orbital Electronic Configuration of Atoms • Aufbau principal-"fill-up" electrons into lowest energy orbitals first • Pauli exlusion principle-only 2 electrons are put in each orbital • Valence electrons are in the outermost shell • Group number in Periodic Table corresponds to the number of valence electrons Valence Electrons Bond Formation • octet rule- atoms are most stable when the outer shell is full corresponding to the nearest noble gas configuration → He, Ne, Ar • Filled shell is 8 electrons for elements in the 2nd row of Periodic Table Ionic Bonding • ionic bond→electrostatic attraction between opp. charged ions (i.e. salts) • results from a transfer of electrons Covalent Bonding • results from a sharing of electrons • typical of the compounds of carbon • most important bond for organic chemistry H• + •H →H2 Lewis Structures • each valence electron is represented as a dot • a bonding pair of electrons is represented as a dash Cl Cl Cl Cl Cl Cl Multiple Bonds Polarities of Bonds and Molecules • polarity of bonds can lead to polarity of molecules • polarity affects a compounds chemical properties i.e. reactivity and physical properties such as MP, BP, and solubility • a molecule is polar if the center of negative charge does not coincide with the center of positive charge Electronegativity and Polarity of Bonds • in covalent bonds, sharing of electrons is not equal between atoms of different electronegativity → hence polarity or polar bond • most electronegative elements in upper right hand side of periodic table • F > O > Cl,N > Br > C,H for electronegativity Electronegativities of Elements Formal Charges • Provide a method for keeping track of charges on elements • Formal charge = grp. number -nonbond. electrons - 1/2(shared elect.) H H For C = 4 - 0 -1/2 (8) = 0 C H H H H H N H B H H For N = 5 - 0 -1/2 (8) = 1 Ionic Structures • Organic structures can contain ionic bonds H e.g. CH3ONa = H C H CH3COONa Na O O H C H H C O Na Resonance • Some molecules require >1 Lewis Structure • resonance structures→2 or more structures of a molecule where the atoms do not move, but the electrons do • the charge is said to be “delocalized” over the relevant atoms Resonance O 1/2 H C H H O 1/2 - Structural Formulas Molecular and Empirical Formulas • Molecular formula gives the number of atoms of each element • Molecular formula of ethanol is C2H6O • Condensed structural formula is CH3CH2OH • Line Formula is OH • Get emperical formula from elemental analysis, e.g. gives C2H6O, then molecular weight gives you the molecular formula 1-12 Wave Properties of Electrons in Orbitals • quantum mechanics-describes the motion of an electron in terms of its energy • must solve the Schrodinger equation or wave equation • solutions from the Schrodinger equation are called “wave functions” • widely accepted as the best theoretical method to understand atomic and molecular structure Molecular Orbitals • When orbitals on different atoms interact, they overlap and hybridize forming molecular orbitals (MO's) • shapes of MO’s are related to the shapes of the atomic orbitals • assumed that each pair of electrons is localized near two nuclei • why do atoms form molecules? →more energetically stable –each electron is attracted by 2 positive nuclei instead of one Recall- 1s Atomic Orbital 2s Atomic Orbital 2p Atomic Orbital Molecular Orbital for H2- Sigma Bond Pi Bonds Pi Bonding Hybridization s-s 3 sp sp2 s-p 'hybrid' C sp H H sp Hybridization Forming BeH2-sp Hybridization sp2 Hybridization sp3 Hybridization i.e. Tetrahedron Shape Unshared Pairs of Electrons, e.g. NH3 sp3 2p 2s 1s 1s H N H H Unshared Pairs of Electrons, e.g. H2O 2s sp3 2p 1s 1s H O H Summary of Hybridization and Geometry Hybrid Orbitals Hybridization Geometry Bond Angle 2 s + p = sp linear 180 3 s + p+ p = sp2 trigonal 120 4 s+p+p+p= sp3 tetrahedral 109.5 Drawing 3D Structures H H H C H C H H H H H H C H C H Bond Rotation Double Bonds Ethylene = 1 sigma + 1 pi bond -double and triple bonds are rigid i.e. do NOT rotate Triple Bonds Acetylene (Ethyne) = 1 sigma + 2 pi bonds Isomerism -structural isomers differ in their bonding sequence H3C H3C CH2 CH2 CH2 CH3 H3C CH3 CH CH2 CH3 H3C C CH3 -stereo isomers differ in the orientation of the atoms in space H3C CH3 C H H3C C H C H H C CH3 CH3
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