Principles of Instrumental Analysis, 6th Edition
6th Edition
ISBN: 9788131525579
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cenage Learning
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Question
Chapter 31, Problem 31.3QAP
Interpretation Introduction
Interpretation:
Thermogravimetric curve is to be determined from the given mass and melting point.
Concept introduction:
Thermogravimetric curve is a plot ofthe percentage of mass and temperature, comprising of a progression of a numbers of steps, acquired by estimating the mass of a sample during heating. It is a strategy used for heat calculation where the mass of a sample is estimated after some time as the temperature changes.
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SH
0
2.
Please consider the two all 'cis' isomers of trimethylcyclohexane drawn below. Draw the
two chair conformers of each stereoisomer below (1 and 2) and calculate their torsional interaction
energies in order to identify the lower energy conformer for each stereoisomer. Based on your
calculations, state which of the two stereoisomers 1 and 2 is less stable and which is more stable.
[1,3-diaxial CH3 CH3 = 3.7kcal/mol; 1,3-diaxial CH3 H = 0.88kcal/mol; cis-1,2 (axial:equatorial) CH3
CH3 = 0.88kcal/mol; trans-1,2-diequatorial CH3 CH3 = 0.88kcal/mol)
all-cis-1,2,3-
1
all-cis-1,2,4-
2
None
Chapter 31 Solutions
Principles of Instrumental Analysis, 6th Edition
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