Skyline College A.J. Bates Professor of Chemistry

     Chemistry 235-238 - Organic Chemistry 2

Chem 210 - General Chemistry 1Chem 235-238 - Organic Chemistry 2
Chem 220 - Lab Manual & Extra Practice ProblemsScience Lecture Series
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Announcements & Important Course Information


Tuesday, December 12

  • Thank you for a very rewarding semester!
  • I have posted the rest of your scores for both courses on Canvas along with your letter grade in each.
    A few notes on viewing your grades:
    • I recommend selecting "Assignment Group” from the "Arrange by:" pull-down menu – this will put them in a logical order.
    • The “Total” at the bottom of the grades display is your overall course percent (including the problem set and exam adjustments in CHEM 235).
    • The entry a few above that one is the “Final Course Letter Grade” – Here you will see a zero with your course letter grade in parentheses.
      • It is formatted this way because the system is only allowing me to enter the letter grade if I put in a null (0/0) grade.
  • Enjoy the Winter Break and good luck in your future courses!


Tuesday, December 5


Monday, November 25

  • I am not feeling well this morning and have decided to cancel classes for today.
  • CHEM 235 Students: Please see the notes below. I recommend using the time to continue reading and problems in Chapter 23 or to begin Chapter 24.
  • CHEM 238 Students:
    • Please use this time to look over the C-13 NMR notes, and begin work on NMR Problem Set #3. There are 5 structure questions. Each has an IR spectrum, a proton NMR and a C-13 NMR spectrum. You could solve the structures without the C-13 NMR, but it will provide some additional structural information that will simplify the determination. Please try to complete the problem setbefore lab next week. However, there will be some time for you to complete it in lab if you are having problems with some fo the questions.

    • I have decided to cancel the second lab test, so next week's lab session will be a regular lab where we will complete the NMR data acquisition and spectrum interpretation, as well checkout of the lab drawers.

    • If you are on campus and wish to turn in the lab report (Wittig) that is due today, you may slide it under my door. However, you may turn it in next Monday in lab for full credit. Please note that there is already a lab report (Aldol) due then.

    • Please see the course calendar for next week's lab schedule.


Sunday, November 24

  • I hope you have all had a good Thanksgiving holiday! As we move into our last two weeks of classes,
    I have some information I would like to share below.
  • CHEM 235:
    • Exam #3 Answer Key
    • Updated grades are posted on Canvas. Please note that the Canvas grade reflects your lowest exam score being replaced with the avearge of your low exam score with the two higher ones, as well as your lowest PS score adjusted to 6 points.
    • See updated reading problem assignments on the LECTURE page. We will be completing Chapter 23 (we have already covered a significant portion in lecture prior to exam #3) and most of Chapter 24 before the Final Exam.
    • Problem Set #11 is posted on Sapling Learning. It is due by 9pm on Sunday, December 3. In case you want to get started on that right away, we have already covered the material for some of the questions and most of the others could be reasoned out from what has been covered already.

Friday, November 16

  • CHEM 235: See the LECTURE page for addtional worksheet answer keys. Reactions 7-12 are the most relevant to the exam material. The Intro to EAS worksheet and questions 2-3 on the Retrosynthesis worksheet may also be helpful.
  • CHEM 238: I have updated the LAB CALENDAR through the end of the semester. Please be sure to look at the due dates and plan accordingly.


Wednesday, November 1


Saturday, October 28

  • CHEM 235: A new problem is posted on Sapling Learning.
    It will be due a week from today – Nov. 4 at 9pm.


Friday, October 27

  • CHEM 238:
    • IR Extra Practice (not graded)
      • Answer Key
      • These questions from Organic Chemistry Laboratory 1 relate to the sort of IR charactieristic peak differentiation that has been required in your interpretations of IR spectra in this course and will be important for the lab test - particularly questions 3 &4. Many of your answers to the IR questions that related to these concepts on NMR Problem Set #2 were incorrect or incomplete. These should help you sort out any issues you might still be having with those concepts.


Wednesday, October 25

  • CHEM 238:
    • Please see the calendar for updated due dates. Nothing is due in lab on Monday.
    • NMR Problem Set #2 answer key is now posted.


Sunday, October 22

  • The answer key for Introduction to EAS is now posted.


Thursday, October 19

  • I am out sick today, and will therefore not be holding office hours.
    I will still be able to answer questions by email.
  • CHEM 235:
    • Please see Sapling Learning for Problem Set #7 (due 10/24 at 9pm) and for copies of the old problem sets and other chapter-related practice questions for extra practice.

    • Additional extra practice worksheet answer keys are now posted.

    • A new extra practice worksheet: Introduction to EAS is also posted.

    • Reminder: Exam #2 is scheduled for next Wednesday (Oct. 25) in lecture and will cover:
      • Chapter 15: Radical Reactions
      • Chapter 16: Conjugated π systems their reactions (including Diels-Alder)
      • Chapter 17: Aromatic Systems
      • Sections 18.1-18.5: Electrophoilic Aromatic Substitution
        • General concepts
        • The EAS mechanism
        • The five electophile formation mechanisms - halogenation, nitration, sulfonation, Friedel-Crafts alkylation and Friedel-Crafts acylation
      • Reactions (including acid-base) and concepts studied previously that relate to the current topics or are needed for synthetic schemes


Monday, October 16

  • CHEM 238:
    • Please see the LABORATORY page and the CALENDAR for important updates.


Saturday, October 7

  • CHEM 235:
    • Reminder: PS #5 on Sapling Learning is due Thursday, October 12 by 9pm.
    • PS#6 has been posted. It is due Tuesday, October 17 by 9pm.
    • The answer key for the VB & MO Theory worksheet is now posted.
  • CHEM 238:
    • Reminder: The PRELAB for the Friedel-Crafts Reaction (Expt #5) is due on Monday, along with the Grignard Report (Expt #3) and the NMR PS#1.


Friday, September 29

  • CHEM 235:
    • On Wednesday, we completed our lectures on Radical Chemistry.
    • We will be moving on to Conjugated pi-systems on Monday. Updates have been made for the 5th edition book problems for upcoming chapters (16-19).
    • Reminder: PS #4 on Sapling Learning is due Tuesday, October 3 by 9pm.
    • PS#5 has also been posted. It is due Thursday, October 12 by 9pm.
    • The answer key for the Reactions 5 worksheet is now posted. Reactions 5 relates to Radical Chemistry.


Wednesday, September 27

  • CHEM 235:
    • Exam #1 Answer Key
    • On Wednesday, October 4, from 11:30-Noon, we will have an Exam #1 / General Exam preparation discussion in the lecture room following the lecture.
  • CHEM 238:
    • NMR Problem Set #1 - Due October 9 at the start of lab. I recommend starting this assignment and making significant progress prior to next Monday's lab, so that you can ask questions about the problem set during our NMR lecture/discussion.
    • I will be returning both experiments 1 & 2 on Monday, October 2 in lab. I would like to discuss the Experiment #2 report in detail at that time, as it is similar in format to many of the reports you will submit this Fall. The report for Experiment #3 (Grignard) will be due the following Monday,
      October 9.
    • Please see the calendar for these and other updates.


Sunday, September 17

  • Additional worksheet answer keys are posted.


Friday, September 8

  • CHEM 235 Students:

    • Sapling Learning Problem Sets 3 & 4 are now posted.
      • These were originally a single, long problem set, but I have separated it into two smaller problem sets.
      • I have also posted copies of Problem Sets 1 & 2 if you wish to rework those problems.
      • I have posted Chapter-related problems on Sapling Learning also for extra practice.

    • Your Quiz #1, PS#1, and PS #2 scores are posted on the CHEM 235 CANVAS Page. Canvas will be used only for reporting grades to you in this section.

    • Quiz #1 Notes:
      • While some students did very well, overall the Quiz #1 scores were very low. This is concerning, as question #1(A-F) and question #2 reflected straightforward examples of each of the classes of reactions they represented. Question #3 (5 of the 30 points) did require application of reactions discussed in a new way and was, as a result, more challenging.These questions are indicative of the style of questions that will be on exams in the course. Exams will often more of the higher-order problems to solve.

      • If your Quiz #1 score is very low, please do not decide to drop right away, and certainly discuss with me first if this is something you are considering. To mitigate a low score on the quiz, I will replace your quiz score with the average of your quiz score and your exam #1 percentage (if it's better) adjusted to 30 and counted double. For example, if you earned 10/30 on this quiz, but earn 80% on exam 1, your score would be replaced with the average of {10,24,24} which is 19.3/30. It is important to make improvements to do well on Exam #1.

      • If you earned less than 20/30 points, I recommend reworking the quiz before class on Monday. Look to your class notes and to the the textbook to help you to answer the questions. After you are confident with your answers, check them with the answer key.
      • If you did not perform well on the first quiz, that means it will be important for you to change your approach to your day-to-day studying and exam preparation. Some suggestions follow:
        • Organize and distill class notes to the most important concepts/reactions/mechanisms following each lecture. Focus on understanding mechanisms and finding the patternes and similarities in them. Stay up-to-date with the course - new ideas and mechanisms are introduced almost every lecture.
        • In the reading, pay special attention to the reactions and mechanisms discussed in lecture, as well as the variations on reactions and mechanisms presented in lecture.
        • Do the problems assigned in the textbook!
          • I have selected problems from the text that are particularly pertinent to the topics emphasized in the course. After you work the problems, check the answers in the student solutions manual.
          • These problems should be one of your principle means of study and exam preparation in the course.
          • If you do not own a copy of the solutions manual, there are copies of the 4th and 5th edition on reserve in the library, and I keep a copy of each in my office that I can loan out for short periods of time if the library copies are not available or convenient.
        • Do the Sapling Learning Problem Sets
          • These are very helpful and the system provides feedback when you make errors.
        • Do the Extra Practice Worksheets
          • These are mostly old exam questions. I recommend doing these as you become more confident with the material in the textbook problems and on Sapling Learning. As much as possible, use only the refernce materials that you will have available on the exam. Don't consult the answer keys until you are reasonably certain that you have the right answer. The questions will look easier after you have looked at the answer key!
        • Come to Office Hours to get help with problems and concepts that you need additional help or clarification on. This is an excellent opportunity to get one-on-one or small group assistance.


Friday, September 1

  • CHEM 235 Students:
    • See the lecture page for Chapter 20 Problem Assignment updates
    • Answer keys for more of the extra practice worksheets have been posted.
    • Wednesday's quiz will include some Organic Chemistry 1 Review material, as well as new material presented from Chapter 9,12, and 20. It will not include Grignard or organolithium reagents.


Thursday, August 31

  • Reminder: As announced in-class this past Monday, Quiz #1 will be administered next Wednesday (Sept. 6) at the start of lecture. It will emphasize new material presented this semester, but will also include review topics from Organic Chemistry 1.
  • I will hold extra office hours this Friday (tomorrow) from Noon-1pm.
  • CHEM 235 Students:
    • The due date for PS #2 on Sapling Learning has been extended to Tuesday, September 5 at 9pm.
    • Additional updates to the course website and Sapling will be made between now and tomorrow evening. Please check back.
  • CHEM 238 Students:
    • Experiment #1 Data and additional announcements will be posted to the website by tomorrow evening. Please check back.


Friday, August 25

  • Reminder: The Sapling Problem Set #1 is due this evening by 9pm.
  • Sapling Learning Problem Set #2 is posted.
  • Please check the lecture page for answer keys to the review extra practice worksheets.


August 16, 2017

  • CHEM 235:
    • The links for the Chapters 9 & 12 Powerpoint slides have been updated. Many of the sections in Chapter 9 and 12 are review and are marked as such in the slides. The review slides will not be covered in lecture.
    • Between now and next Wednesday, I recommend you work on the following:
      • Review 1 Worksheet (provided in lecture)
      • Sapling Learning Problem Set #1 (due Thurs. 8/24 at 9pm)
      • Reading/Problems in Chapters 9 & 12 (see the LECTURE page)
      • CHEM 234 Review (as needed)
  • CHEM 235:
    • Given that the lecture coincides with the partial solar eclipse in our area and the full solar eclipse that many of you are traveling to, I am cancelling lecture for Monday, August 21.
    • I encourage those of you here in the Bay Area to try to safely experience the eclipse from campus or a location where the sky is clear.
  • CHEM 238:
    • We will have an abbreviated lab session on Monday, Auguat 21, as several students will be traveling to see the full solar eclipse. Our lab session will include the following:
      • Safety Discussion
      • Lab drawer check-in
      • Experiment #1 Lab lecture: Intro to GC, Review of Elimination Reactions - You can find the lecture notes outlines on the LABORATORY page and the handout for Experiment #1 in the LABORATORY MANUAL on CANVAS.
    • If you will not be in lab on Monday, August 21,
      • Please email me to let me know, so that I will set aside a lab drawer for you.
      • Plan to come to the lab on Wednesday, August 23 from 2:00 - 3:30 pm to make-up the Safety discussion and check into the lab drawer. Though I will not repeat the full lab lecture, you can find the outline online and I will direct you to the appropriate resources.
      • Please let me know ASAP if you cannot attend the make-up, as we will need to find an alternate class for you to sit in on the safety video.
    • Corrected CHEM 238 Laboratory Syllabus
      (corrected meeting day & time and updated office hours)
  • I will hold office hours from Noon-1pm and 3-4pm on Monday, August 21.


August 2017

  • Welcome to Organic Chemistry 2 for Science Majors - CHEM 235 / 238
  • Please check back this website regularly for course information. I will be providing most of the course materials through this website and not through the Canvas system (with the exception of the lab manual).
  • CHEM 235: Our first lecture will be on Wednesday, August 16 at 10:10 am in 7-115. We will briefly cover course requirements on the syllabus and begin our first lecture/discussion.
  • CHEM 238: Our first laboratory meeting will be on Monday, August 21 at 1:10 pm in 7-341. We will cover safety, have our first lab lecture, and check into lab drawers on this day.
  • The course text is: Organic Chemistry, 3rd, 4th or 5th edition by Janice Smith. I also strongly recommend the Study Guide and Solutions Manual to Accompany Organic Chemistry, 3rd, 4th or 5th edition - be sure that your solutions guide matches the text edition you purchase. A copy of the 4th & 5th edition solutions guide is on reserve in the library (or will be added very soon).
  • Free access to Organic Chemistry, 5th ed. by Smith is available online
    for two weeks with the following link:
      • Instructions to Register
        • You will need to register with the system to access it. If you are already registered with Connect, just login. You can enroll for free for two weeks. We will NOT be using Connect for the course, so you should NOT buy access.
        • Note: If you are not able to use the same account that you used in a previous semester to get the two-weeks free access to the text, create a new account from a different email address.
  • Your graded problem sets will be posted administered through the Sapling Learning Online Homework System. The direct link is below. Please sign up as soon as possible.
    • Follow the above link.
    • If you have an account, log in. If you do not have an account, create an account.
    • Please enter your first and last names in the profile as they appear on your official Skyline record. If you go by a different name or a nickname, please put it in parentheses after your first name.
    • When you register for the course on the system, you may select to use it for the first two weeks of the semester for free. You must then pay at the end of the trial period to continue to have access.
    • The first Sapling Learning problem set is posted. If you register in the course and correctly answer at least one question on Problem Set #1 by 4pm on Friday, August 18, you will earn 2 bonus points.
  • For Review: CHEM 234 - Spring 2017 LECTURE Page
    • I recommend reviewing reactions and mechanisms from Organic Chemistry 1 - these relate to chapters 2 & 7-12 in the Smith textbook, and include Acid-Base, Nucluophilic Substitution, Elimination, Addition, and Hydrogenation Reactions.


Academic Integrity

  • Academic integrity is an important issue in all academic settings, and will be taken very seriously by the instructor of this course, and the college generally. This topic will be addressed in detail in the first week of classes in lecture and in lab.

  • I recognize that most students conduct themselves with honesty and integrity. I also recognize that the actions of a few dishonest students and the impact of those actions on the academic process necessitate a frank and ongoing discussion of this issue.

  • Please review the Student Handbook information on Academic Integrity.