Organic chemistry tutoring.
Free Ochem tutoring on Thursdays.

Individual and group sessions for Chem 51A–C and upper-division organic chemistry. Practice problems, solutions, and videos are posted below by topic as they are finished.

Practice by topic

Topics follow the usual course order. Problems, solutions, and videos are posted as each is finished. Practice material is organic chemistry only for now.

Illustration of an SN2 reaction: hydroxide attacks bromomethane from the side opposite bromine, and bromide leaves in the same step. — **Worked example · S_N2.** Hydroxide attacks carbon from the side opposite bromine. The C–O bond forms as the C–Br bond breaks, in one step. At a stereocenter this backside attack inverts the configuration.

Interactive tools

Gen chem · Bonding VSEPR Builder Count electrons, find the steric number, and watch the 3D shape build. Tap through every AX_mE_n geometry from AX₂ to AX₂E₄. Open the builder › Gen chem · Equilibrium Equilibrium Explorer Work an equilibrium problem step by step: K expression, Q versus K, the ICE table, and solving for x, with feedback at every step. Then disturb it and watch Q chase K. Open the explorer ›

Other topics: text a request ›email a request ›

What students say.

Partho had very advanced and wide knowledge of the material. If I didn’t understand the information, because he had such extensive knowledge, he was able to explain it various different ways until I understood it.

Before I signed up for tutoring, I had a C average in Orgo 1. With Partho’s help, I pulled my grade up to B+ and then second semester with his help I achieved a grade of A−.

Kamran H. · Organic Chemistry 1 & 2 · University of Texas at Austin · private tutoring

211anonymous evaluations from 16 UCI sections of CHEM 51A–C

8.0/9overall TA rating, CHEM 51A, Summer 2025 (up from 6.8 in 2023)

80%said he presented the material in a way that helped them understand it

“Out of all of the many TA’s I’ve had in my years at UCI, Partho is by far the most enthusiastic and genuine of them all.”

CHEM 51A · Summer 2025

“He encourages us to make mistakes during discussion to prevent us from making them during the exam.”

CHEM 51A · Summer 2025

“[T]he TA didn’t just walk us through the problems but made us walk him through the problem.”

CHEM 51A · Fall 2022

“[W]hen [Partho] went over Diels-Alder...my life was changed. I thought I’d never understand those problems!”

CHEM 51B · Winter 2023

“He made himself relatable by telling us how he struggled with this material and what he did to overcome it. […] Having that support from your TA really does impact your learning.”

CHEM 51B · Winter 2023

“I love that he always wears an ochem shirt on Thursdays for class..it makes my day.”

Organic Chemistry

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Student reviews

211anonymous evaluations from 16 UCI sections of CHEM 51A–C
8.0/9overall TA rating, CHEM 51A, Summer 2025 (up from 6.8 in 2023)
80%said he presented the material in a way that helped them understand it

“Out of all of the many TA’s I’ve had in my years at UCI, Partho is by far the most enthusiastic and genuine of them all.”
CHEM 51A · Summer 2025
“He encourages us to make mistakes during discussion to prevent us from making them during the exam.”
CHEM 51A · Summer 2025
“[T]he TA didn’t just walk us through the problems but made us walk him through the problem.”
CHEM 51A · Fall 2022
“[W]hen [Partho] went over Diels-Alder...my life was changed. I thought I’d never understand those problems!”
CHEM 51B · Winter 2023
“He made himself relatable by telling us how he struggled with this material and what he did to overcome it. […] Having that support from your TA really does impact your learning.”
CHEM 51B · Winter 2023
“I love that he always wears an ochem shirt on Thursdays for class..it makes my day.”
Organic Chemistry

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