CHEM 30B
Organic Chemistry II: Reactivity, Synthesis, and Spectroscopy
Lecture and discussion.
Winter 2026: 1 lecture and 6 discussions. 1 lecture and 5 discussions are open. The oldest of these readings was about 2 months ago.
Grades
3.22
Average grade awarded in CHEM 30B. Not a student rating: this is what the grades were.
In the A range
52%
of the 2,170 letter grades
D, F or W
5.9%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
1%
5 of 15 students passed
The registrar's own records: 2,170 grades over 13 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
4 of those terms are summer sessions, and summer sessions are counted here.
The table below splits them, and term averages across those 13 terms ran 2.78 to 3.70.
Historical grades for all professors, across recorded terms. The course summary above includes all professors.
- A+ 155 · 7.1%
- A 555 · 25.6%
- A- 421 · 19.4%
- B+ 261 · 12.0%
- B 198 · 9.1%
- B- 153 · 7.1%
- C+ 120 · 5.5%
- C 94 · 4.3%
- C- 88 · 4.1%
- D+ 45 · 2.1%
- D 25 · 1.2%
- D- 30 · 1.4%
- F 25 · 1.2%
- P 5 of 2,199
- NP 10 of 2,199
- I 10 of 2,199
- NR 1 of 2,199
- DR 3 of 2,199
Percentages are of the 2,170 letter grades. Grey bars are non-letter outcomes: passes (P), no-passes (NP), incompletes (I), no report (NR), and withdrawals (DR).
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
Withdrawals are the exception to "excluded": DR is not scored, but it IS counted in the D, F or W figure above, which is reported over the letter grades plus the withdrawals. Pass/no pass and S/U outcomes are outside that figure on both sides.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Winter 2026 |
|---|---|---|---|---|---|---|---|
| PHAM, HUNG VIET reviews ↗ | 2.96 | 2.95 | 730 | 4 | 40% | light | not teaching it |
| OW, FRANKLIN P reviews ↗ | 3.30 | 3.31 | 727 | 4 | 54% | very light | not teaching it |
| DEIFEL, NICHOLAS reviews ↗ | 3.55 | 3.58 | 228 | 2 | 71% | - | not teaching it |
| REILLY, AMBER reviews ↗ | 3.11 | 3.10 | 221 | 1 | 52% | - | not teaching it |
| RUBIN, YVES F reviews ↗ | 3.66 | 3.70 | 198 | 1 | 74% | average | not teaching it |
| REILLY, AMBER JAYNE reviews ↗ | 2.97 | 2.90 | 66 | 1 | 39% | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Reported assignments across instructors and terms. This term's syllabus may differ.
No assignment details are available in this review summary. Based on 180 reviews; source checked about 1 month ago. Missing details do not mean there are no papers or exams. Check the current syllabus.
What comes first
The chain dibs can see is 2 courses long before CHEM 30B. Read from Fall 2026, because dibs has not read a class page for CHEM 30B in Winter 2026 and a department can change what it requires. This is a floor, not a deadline: dibs has not read a class page for CHEM 20B, so the real chain can only be longer than this, never shorter.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Winters
Ran in 4 of the last 4 Winters.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, three hours; discussion, one hour. Enforced requisite: course 30A or 30AH, with grade of C- or better. Second term of organic chemistry for Chemistry, Biochemistry, and engineering majors. Properties, synthesis, and reactions of alcohols, ethers, sulfur compounds, aldehydes, ketones, carboxylic acids, and carboxylic acid derivatives. Organometallic compounds. Organic spectroscopy, including mass spectrometry, infrared spectroscopy, and proton and carbon nuclear magnetic resonance spectroscopy. P/NP or letter grading.
Sections in Winter 2026
Choose an open discussion to enroll; an open lecture alone does not mean a seat is available.
Seat counts as of : the oldest of these 7 readings. That term is over, so nothing has moved since.
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Seats
Open11 seats left in discussions.
Lecture: 168 of 178 enrolled
Instructor
Gutierrez, O.
3.22Predicted GPA
Historical records across all instructors; 2,170 letter gradesSeat risk
-6 discussions, 5 open.Every discussion, with its time and seats: 6 discussions
-
Open
6 seats left.
24 of 30 enrolled
-
Open
2 seats left.
27 of 29 enrolled
-
Open
1 seat left.
29 of 30 enrolled
-
Closed
30 of 30 · 1 over enrolled
-
Open
1 seat left.
29 of 30 enrolled
-
Open
1 seat left.
28 of 29 enrolled
-
Final enrollment, averaged across each term's sections: between 137 and 257 a term over 9 terms, summer excluded, most recently 257 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking CHEM 30B was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.
Seats over time in Winter 2026
How each lecture has filled since dibs first saw it.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Lec 1 · Gutierrez, O. · 168 of 178 enrolled
Unchanged over 1 minute
Both readings say 168 of 178.
How readings and alerts work
Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.