13) Which of the following provides an efficient method of
converting 3-bromo-2-methyl-1-butene into 2-methyl-2-butene?
A) 1) NaOH; 2) H2, Pd/C
B) 1) H2, Pd/C; 2) NaOEt
C) 1) H2, Pd/C; 2) Br2
E) 1) H2, Pd/C; 2) KOtBu
And I have already known that the correct answer is B, but
why?
I cannot understand...Please help!!
Really thanks
Butanone, when treated with methyl magnesium bromide and then
dilute aqueous acid, yields 2-methyl-2-butanol.a) Please explain how Grignard reagents work. For example, what
role does the magnesium play, and why is carbon unusually
nucleophilic?(b) Please explain why the product not is a racemic mixture of
enantiomers of 2-methyl-2-butanol.(c)What role does acid (H+) play in this reaction? [Hint: it is
not a catalyst.]
1)When optically active (R)-2- methyl cyclohexanone is
treated with aqueous acid , its optical activity is lost, Explain
the observation in detail.
2)Why is acid catalysed halogenation of ketones
generally prefered over the base promoted halogenation?
3)Provide a detailed ,stepwise mechanism for the
Robinson annulation reaction between 2- methyl cyclohexanone and
methyl vinyl ketone (But-3-en-2-one
4) Give the correct structures for the compounds A to
C in the following reaction schemes:
Acetophenone + pyrole (in acidic ) = A +...
1)
Consider these molecules:
1-pentene
2-pentene
2-methyl-2-butene
cyclopentane
1-methyl-cyclobutene
2-methyl-1-butene
Which is not a stereoisomer of the others?
2-pentene
cyclopentane
1-methylcyclobutene
2-methyl-2-butene
These are all stereoisomers of one another.
2)
Classify 3-methyl-2-butanol as a primary, secondary, or tertiary
alcohol.
Primary
Secondary
Tertiary
More information is needed to solve this.
It can be more than one of these.
3)
What must be present for an addition polymerization reaction to
occur?
Two hydroxyl groups (one on each molecule).
An acid.
An hydroxyl...
1.What is glaucoma and how can it be treated?
2.What happens if it is not treated?
3.What is noise-inducing hearing loss?
4. Name people that are higher likely to get this and what is
the treatment?
N-Methyl-2-pyrrolidone is an aprotic solvent used in many industrial processes. Draw the structure of the product formed when it is heated with strong aqueous acid 6MHCI, H20 and heat.
Why is that when 3-methyl-2-butanol is treated with HBr, a
single alkyl bromide is formed that results from a hydride shift
and when 2-methyl-1-propanol is treated with HBr, no rearrangement
occurs to form an alkyl bromide ??
Which is lower in potential energy: 2-methyl-2-butene or
2-methyl-1-butene? (circle one)
I recently said that the answer was incorrect, that was a
blunder on my part. I submitted the wrong answer when I made a
comment. 2-methyl-butene is tert therefore has the highest
stability and lowest PE
a.) Draw the structural formula of
(E)-1,2-dibromo-3-isopropyl-2-hexene
b.) Draw the structural formula of (Z)-3-methyl-2-heptene.
c.) Draw the structure for 1-chloro-3-hexyne
d.) Draw the structure for cyclooctyne
e.) Draw the structure for 4,4-dimethyl-1-pentyne