Organic Chemistry: Reaction Mechanisms
Trace nucleophilic substitution and elimination mechanisms step by step with interactive arrow-pushing exercises.
6
sections
10
challenges
40 min
to complete
Organic Chemistry: Reaction Mechanisms is an interactive chemistry lab pitched at Level 5-6 — Undergraduate (Level 5-6 on the UK framework). It is one worked example of what EngagedLab produces when a lecturer uploads their own chemistry teaching material: the platform classifies the content, structures it into a multi-section lab, and generates the retrieval-practice and challenge activities shown below.
Across 6 sections and 10 challenges (about 40 min of learner time), the lab moves beyond passive reading. Learners work through a mechanism task and other domain tasks that ask them to apply, not just recall — reasoning that is tagged against Bloom’s taxonomy so the cognitive demand is visible. Each objective and quiz question is discipline-accurate and written to UK academic conventions.
The lab sets 3 explicit learning objectives — listed in full below — and every quiz question and challenge is aligned to them, so the assessment matches the intended outcome rather than drifting into trivia. The finished lab passes EngagedLab’s 32 quality gates and exports as an offline-capable SCORM 1.2/2004 or LTI 1.3 Advantage package, so progress and scores flow back to your VLE gradebook through AGS grade passback and cmi.suspend_data state persistence.
Learning objectives
Distinguish SN1 and SN2 mechanisms by rate law, stereochemistry, and substrate structure.
Predict whether substitution or elimination dominates for a given substrate and conditions.
Use curly-arrow notation correctly to represent electron-pair movement.
Try a sample quiz
Pick an answer to see instant feedback — exactly as a learner would in the generated lab.
Q1. A tertiary alkyl halide reacts with a weak nucleophile in a polar protic solvent. Which mechanism is favoured?
Q2. The SN2 mechanism proceeds with:
Sample challenge
Using curly arrows, outline the mechanism for the reaction of 2-bromo-2-methylpropane with water, and state the rate-determining step.
Hint 1
A tertiary halide with a neutral nucleophile points to a particular mechanism — how many steps does it have?
Hint 2
It is SN1: the slow, rate-determining step is heterolysis of the C–Br bond to form a tertiary carbocation, followed by fast attack of water and loss of a proton.
What every EngagedLab lab includes
Learning objectives
Outcome-aligned goals mapped to the qualification level.
Guided practice
Graduated hints that nudge, then scaffold — never hand over the answer.
Domain challenges
Subject-specific reasoning tasks, not generic multiple choice.
Knowledge-check quizzes
Spaced retrieval questions with instant feedback.
Case study
A multi-section scenario with stakeholder perspectives.
Reflection prompts
Metacognitive prompts that consolidate learning.
Curated reading list
4–6 further readings sorted by difficulty.