OCR A Jun 2015 Paper 2 Q7

Answers available below

L, M, N and P are straight-chain organic compounds containing C, H and O only. The flowchart shows reactions involving these compounds. 20 elimination of H2O polymer P Mr ~ 10,000 H+/Cr2O7 2 reflux dicarboxylic acid, M Analysis of compound L shows the following.Relative molecular mass of 90.0.The infrared spectrum below. Percentage composition by mass: C, 40.00%; H, 6.67%; O, 53.33%. IR spectrum of L 100 e c n a t t i m s n a r t 50 0 4000 3000 2000 wavenumber / cm1 1500 1000 500 (a) Calculate the empirical and molecular formulae of compound L. Show your working.[3]OCR 2015<br />
 (b) Analyse the information and spectrum to determine the structures of L and M. Include an equation for the reaction of L to form M. 21[5] (c) Determine the structures of compounds N and P. Estimate the number of repeat units in polymer P and write the equation for the formation of P from N.[4] [Total: 12]OCR 2015 END OF QUESTION PAPER<br />

Show answer