Organic Chemistry: Principles and Mechanisms (Second Edition)
Organic Chemistry: Principles and Mechanisms (Second Edition)
2nd Edition
ISBN: 9780393663556
Author: Joel Karty
Publisher: W. W. Norton & Company
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Chapter 7, Problem 7.2YT
Interpretation Introduction

Interpretation:

The necessary curved arrow notation for the given proton transfer is to be drawn.

Concept introduction:

Atoms in the first and second rows of the periodic table obey the octet rules. The negatively charged ion gains electrons to complete its octet, and the positively charged ion loses electrons to complete its octet. The negatively charged ion is an electron-rich site, and the positively charged ion is an electron-poor site. In an elementary step, electrons tend to flow from an electron-rich ion to an electron-poor ion. Highly electronegative atoms have a partial negative charge, and the electron-poor group has a partial positive charge.

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fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

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Organic Chemistry: Principles and Mechanisms (Second Edition)

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