Aldehydes with strongly electron donating groups, such as
p-dimethylaminobenzaldehyde, or with strongly electron withdrawing
groups, such as p-nitrobenzaldehyde, fail to undergo
self-condensation in the presence of cyanide ion. However such
aldehydes will undergo mixed condensations with benzaldehyde.
Explain.
Electron Withdrawing (EWD) and Electron Donating (ED) groups on
a monomer have a significant bearing on the strength of initiator
required for polymerisation to occur. Using a cyanoacrylate based
monomer illustrate how the EWD functionality on a monomer and
anionic initiator strength can be tailored for use in a commercial
application
1. In a Diels-Alder reaction, electron-withdrawing groups in the
dienophile end up preferentially in
the _________ position, and the diene must be in the
____________ conformation.
A) Endo; s-cis C) Exo; s-trans
B) Endo; s-trans D) Exo; s-cis
2.What is the hybridization of the central carbon of allene
(1,2-propadiene)? A) sp B) sp2 C) sp3 D) p
3.Which of the following corresponds to the COC bond angle in
diethyl ether? A) 60o B) 110o C) 120o D) 180o
4.Which of...
Marketing/Business
Why is it important to test for within group difference (ie
males and females in a sample) vs test for across group difference
(ie. males and males in another sample)? Can provide some examples
of research that you have experienced related to this issue?
Defining and classifying groups -Why do people join
groups?
Describe Obstacle to group productivity. Take your company/
organization and assess the way it deals with working groups in
the
organization.