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Exam 3 CHEM 345 Questions With Completed & Detailed Answers.
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Exam 3 CHEM 345 Questions With Completed & Detailed Answers.
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Exam #3 CHEM 345CN addition to carbonyl - ANS -reversible
-adds CN
-makes OH
H2O addition - ANS -Adds 2 OH groups
-Reversible
-Acid or base catalyzed
LiAlH4 - ANS CO double bond to H and OH groups
Lithium aluminum hydride is a very strong reducing agent. It will reduce aldehydes, ketones,
esters, and carboxylic acids to alcohols, and amides and nitriles to amines. It will also open
epoxides.
NaBH4 - ANS Replace CO double bond w/ H and OH group
OH and adjacent H can form water also and create double bond on ring
Sodium borohydride is a reagent for the reduction of ketones and aldehydes, it will also reduce
acid halides.
Catalytic Hydrogenation - ANS reducing an CO double bond to OH and H groups
Grignard reagent - ANS An alkyl magnesium halide that is used to make carbon-carbon bonds
Can also add to carbonyl
Organolithium reagents - ANS R-Li
Adds R groups similiar to grignard
Acetals - ANS primary carbons with two -OR groups and a hydrogen atom. hemi is when one
OR group other OH
cyclic hemiacetal - ANS forms when the carbonyl group and the — OH group are in the same
molecule. 5/6 member rings
Amine reactions - ANS Replace CO double bond w/ CN bond and an associated R group also
has OH group. Can also form double bond on ring by losing OH and adjacent H to form it
Wolf-Kishner Reduction - ANS Removes CO double bond from molecule
Clemmenson Reduction - ANS Removes CO double bond from molecule
Acylate w/ acid chloride - ANS Add R groups to benzene
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