o 41% Safari ...oo WE 4:15 PM C. e c differential rate laws summary sheet [Compa
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o 41% Safari ...oo WE 4:15 PM C. e c differential rate laws summary sheet [Compatibility Mode] a Home Insert Draw Layout Review View Cambria 14 obtaining Rate Laws From Graphical Data The Baylis-Hillman reaction: in which an a unsaturated ester(4) is condensed with an aldehyde (PhCHO) in the presence of a catalytic amount of a nitrogen base (NR3) to form a 5 is shown below The following date was measured. 0012 083 M 084 M 0012 NRJ 0.27M 0004 04 0.6 06 1 PhCHO) (M) 0016 0004 0.000 INRal (M) Use the data provided (read values from the graph o write a differential rate law in terms of I41, PhCHol, and INRal. Show all steps. Note, if you look up the paper, you can check your ANSwER lb. What is the value of k? c, What units does k have? Price, K. E. Broadwater,S J. Walker, BJ D. 1.org. Chem. 200s, 70,3980-3987.Explanation / Answer
For the above shown reaction and the data set,
a. The plots for rate vs all three aldehyde, amine (catalyst) and a,b-unsaturated substrate are almost a straight line. That means they are all directly protortional to rate. The rate law would thus be first order with respect to all three,
rate law = k[4][PhCHO][NR3]
b. k = 0.002/0.83 x 0.27 x 0.2 = 0.045
c. units for k = M-2.s-1
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