Answered: (1) RNH, + CO2 R-N=C=0 + 2 H,0 Н…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The valuable polymer polyurethane is made by a condensation
reaction of alcohols (ROH) with compounds that contain
an isocyanate group (RNCO). Two reactions that can
generate a urethane monomer are shown here:

(a) Which process, i or ii, is greener? Explain.
(b) What are the hybridization and geometry of the carbon
atoms in each C-containing compound in each reaction?
(c) If you wanted to promote the formation of the isocyanate
intermediate in each reaction, what could you do,
using Le Châtelier’s principle?

(1) RNH, + CO2
R-N=C=0 + 2 H,0
Н
R-N=C=0 + R'OH
R-N-C-OR'
||
(ii) RNH2 +
R-N=C=0 + 2 HCI
н
R-N=C=0 + R'OH → R-N-C-OR'

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