chem

Question 1

List 2 heterocyclic compounds with one heteroatom in a five-membered
ring:
1. Pyrrole
2. Pyridine
3. Pyran
4. Furan

Answer 1

1. Pyrrole
2. Furan

Question 2

40. Indicate 2 heterocycles with two heteroatoms in a five-membered ring:
41. Pyrrolidine
42. Pyrazole
43. Imidazole
44. Pyrimidine

Answer 2

2. Pyrazole
3. Imidazole

Question 3

41. Specify 2 six-membered heterocycles with one heteroatom:
42. Pyrimidine
43. Pyridine
44. Cytosine
45. Quinoline

Answer 3

2. Pyridine
3. Quinoline

Question 4

43. Specify 2 six-membered heterocycles with two nitrogen atoms:
44. Pyridine
45. Pyrazine
46. Pyrrole
47. Pyrimidine

Answer 4

2. Pyrazine
3. Pyrimidine

Question 5

alkenes

Answer 5

AE

Question 6

ethane halogenation

Answer 6

SR

Question 7

aldehydes

Answer 7

AN

Question 8

cyclohexane

Answer 8

SR

Question 9

benzene halogenation

Answer 9

SE

Question 10

Alkan

Answer 10

SR

Question 11

Classify the heterocyclic compounds:
1. Pyrrole
2. Pyrazole
3. Pyridine
4. Pyrimidine
A. Five-membered heterocycle with one heteroatomB. Five-membered heterocycle with
two heteroatomsC. Six-membered heterocycle with one heteroatomD. Six-membered
heterocycle with two heteroatoms

Answer 11

pyrrole = five-membered heterocyclic compound With 1 heteroatoms
pyrazole = five-membered heterocyclic compound with 2 heteroatoms
pyridine = a six-membered heterocyclic compound with 1 heteroatom

Question 12

Provide the correct names for these heterocyclic compounds:
1. Three-membered
2. Five-membered
3. Six-membered with one heteroatom
4. Six-membered with two heteroatoms
A. EpoxideB. PyridineC. PyrimidineD. Pyrrole

Answer 12

1) three-membered = epoxide
2) five-membered = pyrrole
3) six-membered with one heteroatom = pyridine
4) six-membered with two heteroatoms = pyrimidine