Posted: August 24th, 2016

Construct the multiplets that are at 6.6 ppm and 6.3 ppm in the proton NMR spectrum and identify the protons that are coupling to each other

Task 1: Assign all the proton and carbon chemical shifts and fill the table (above). Task 2: Provide brief bullet points to highlight deductions used to prove the assignments – do not use more than one side of A4 paper for task-2. Task 3: The protons of the alkene group are shown to be trans to each other – discuss the characteristic 3 JHH proton couplings of cis and trans alkene protons, mention the influence of orbital overlap. Task 4: Construct the multiplets that are at 6.6 ppm and 6.3 ppm in the proton NMR spectrum and identify the protons that are coupling to each other. Breakdown of the marks available: Task-1 (20%), Task-2 (30%), Task-3 (30%), Task-4 (20%).