Chemistry 1027A/B Chapter Notes -Trigonal Pyramidal Molecular Geometry, Aliphatic Compound, Hydrogenation

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16 Dec 2013

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Derivatives of ammonia (nh3) in which one or more h are replaced by alkyl or aryl groups. Classified as 1 , 2 , or 3 depending on number of h atoms of ammonia that are replaced. The 3 atoms / groups bonded to the n in amines assume a trigonal pyramidal geometry. Aliphatic amine: amine in which n is bonded only to alkyl groups. Aromatic amine: amine in which n is bonded to one or more aryl groups. Heterocyclic amine: amine in which n is one of the atoms of a ring. Heterocyclic aromatic ring: amine in which n is one of the atoms of an aromatic ring. Amines are polar compounds, both primary and secondary amines form intermolecular h bonds. All classes of amines form h bonds with water and are more soluble in water. Like ammonia, all amines are weak bases. All aliphatic amines have about the same base strength and are slightly stronger bases than ammonia.

Related Questions

1)The reaction of benzamide, C6H5CONH2, with LiAlH4 yields which of the following compounds?
A.benzoic acid
B.benzonitrile
C.benzylamine
D.ammonium benzoate
E. none of the above

2) Electron-releasing groups bonded to an amine nitrogen increases it basicity. T or F?

3) Ammonium salts are water soluble. T or F?

4)A compound which is insoluble in water but which dissolves in dilute hydrochloric acid is

A. probably an amide
B.possibly a carboxylic acid
C.almost certainly an amine
D.probably neither acidic nor basic
E.probably an ester

5)Primary and secondary amines react with nitrous acids to form stable diazonium salts. T or F?

6). Dimethylethylamine is classified as a

A.primary amine
B.secondary amine
C.tertiary amine
D.quaternary amine

7)Heating a(n) _______ results in a Cope elimination.

A.amine oxide
B.imine
C.enamine
D.oxime
E.quaternary ammonium salt

8) Aniline is less basic than methylamine because:

A. resonance in aniline increases the electron density on nitrogen: this effect is not possible for methylamine.

B.resonance in aniline stabilizes the nonprotonated base but does not stabilize the protonated base: in methylamine resonance is of no importance for the protonated or unprotonated forms.

C.the acid-base reaction of aniline with a proton is kinetically rather than thermodynamically controlled.

D.the ortho hydrogens of aniline interfere with protonation of its amino group.

E.The question is incorrect, aniline is actually more basic than methlamine.

9) Amines can best be separated from nitro compounds by an extraction procedure employing diethyl ether and:

A.water
B.aqueous HCl
C.aqueous NaOH
D.concentrated H2SO4

10) An amino group is a powerful ortho-para director. T or F?

11) What is the hybridization of the nitrogen atom in CH3NH2?

A. sp
B.sp2
C.sp3
D.s-sp3
E.a primary amine

12) Diazonium salts readily couple with phenols and aromatic amines to form azo compounds. T or F?

13) Aniline is a stronger base than ammonia. T or F?

14) What type of amine is tert-butyl amine?

A.primary
B.secondary
C.tertiary
D.quaternary
E.none of these

Needs answer to all including drawing, thanks

Classify each of the following statements as true or false:

a) To be classified as organic, a compound must be or have been part of a living organism.

b) Carbon atoms normally form four bonds in organic compounds.

c) Only an unsaturated hydrocarbon can engage in an addition reaction.

d) Members of a homologous series differ by a distinct structural unit.

e) Alkanes, alkenes, and alkynes are unsaturated hydrocarbons.

f) Alkyl groups are a class of organic compounds.

g) Isomers have the same molecular formulas but different structural formulas.

h) Cis-trans isomerism appear among alkenes but not alkynes.

i) All aliphatic hydrocarbons are unsaturated.

j) Aromatic hydrocarbons have a ring structure.

k) An alcohol has an alkyl group bonded to an oxygen atom, and an ether has two.

l) Carbonyl groups are found in alcohols and aldehydes.

m) An ester is an aromatic carbon made from the reaction of an alcohol and a carboxylic acid.

n) An amine has one, two, or three alkyl groups substituted for hydrogens in an ammonia molecule.

o) An amide has the structure of a carboxylic acid except that replaces OH in the carboxyl group.

p) A peptide linkage series arises when a water molecule forms from a hydrogen from the of one amino acid molecule an from an another amino acid molecule.

r) Chain-growth polymers are made a reaction that gives off water a second product.

s) Nylon is an example of a step-growth condensation polymer.

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Chemistry 1027A/B Chapter Notes -Trigonal Pyramidal Molecular Geometry, Aliphatic Compound, Hydrogenation

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