acs Flashcards
is epoxidation stereoselective or regiospecific
it is stereoselective only
whats the nitrogen rule for mass spec
even masses have either 0 or +2 nitrogen
odd masses have at least 1 nitrogen
where do aldehydes and ketones appear on C13 NMR
190-200
where do esters, carboxylic acids and carbonyls appear on 13C NMR
160-180
where do alkyne bonds appear on IR
2100
where do cyanide bonds appear on IR
2100
where do amine bonds appear on IR
3400 as a sharp peak
where are triple bonds in C 13 NMR
75-90
where are alkene bonds in C12 NMR
100-160
in the presence of a strong acid, what happens to sulfate groups on aromatic rings
they are removed
when reacting an aromatic chloride with liquid amonia what two products are observed
an amine will substitute in place of the chloride or it will substitute meta but never para
what does lithium aluminum hydride to do amides?
reduces it to an amine
when reacting an alkene with Br2 and light, what is the resulting reaction
allylic substitution
which is a better lewis base? water or a carbonyl?
carbonyls tend to act as electrophiles so water is a better lewis base
what reagents will reduce an alkyne to an alkane
H2/Pt or H2/Pd
what reagents will reduce an alkyne to a cis alkene
lindlars catalyst or H2, Pd/CaCO3
what reagents will reduce an alkyne to a trans alkene
Metal and hydrogen source or Na/NH3
what are the reagents for carbene to make a cyclopropane
Zn(cu). Ch2I2
NaOH/CHCl3
Daizomethane
why is an amine more nucleophillic than an alcohol
it is less electronegative so it is more willing to donate its electrons than an alcohol
why is a SH more nucleophillic than an alcohol
it is more polarizable
what is the general trend for Michael addition products
two carbonyls separated by 3 carbons in the middle (1,5) carbonyl
