6) Why are cis- and trans-stillbene visible on a TLC plate when viewed with short-wave ultraviolet light?

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter16: Applications Of Neutralization Titrations
Section: Chapter Questions
Problem 16.6QAP
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6) Why are cis- and trans-stillbene visible on a TLC plate when viewed with
short-wave ultraviolet light?
STILLBENES HAVE CONJUGATED DOUBLE BONDS, ABSORBS SHORTWAVE UV
LIGHT AND EMIT VISIBLE LIGHT, SO WE CAN SEE SPOTS
7) WHAT WAS THE PURPOSE OF SODIUM HYDROXIDE? WHAT WOULD
HAPPEN IF ITS OMMITED
RXN PROCEEDS VIA ANION GENERATION. TO MAKE ANION PHOSPHATE
NEED STRONG BASE. IF WE DON'T ADD IT RXN DOES NOT PROCEED.
Transcribed Image Text:Question: 6) Why are cis- and trans-stillbene visible on a TLC plate when viewed with short-wave ultraviolet light? STILLBENES HAVE CONJUGATED DOUBLE BONDS, ABSORBS SHORTWAVE UV LIGHT AND EMIT VISIBLE LIGHT, SO WE CAN SEE SPOTS 7) WHAT WAS THE PURPOSE OF SODIUM HYDROXIDE? WHAT WOULD HAPPEN IF ITS OMMITED RXN PROCEEDS VIA ANION GENERATION. TO MAKE ANION PHOSPHATE NEED STRONG BASE. IF WE DON'T ADD IT RXN DOES NOT PROCEED.
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