Which of the following is not a heterocyclic compound?
A)
1
B)
2
C)
3
D)
4
E)
5
Question 2Which of the following statements about the pyrylium ion is false?
A)
The pyrylium ion appears as a substructure in many pigments.
B)
The pyrylium ion is an example of an aromatic cation.
C)
The oxygen lone pair in a pyrylium ion is basic.
D)
All atoms in the pyrylium ion (except the hydrogens) are
sp2-hybridized.
E)
The pyrylium ion will react with nucleophiles.
Question 3Which of the following statements about pyridine is false?
A)
The nitrogen is basic.
B)
Pyridine reacts faster than benzene in electrophilic aromatic substitution reactions.
C)
Pyridine can behave as a hydrogen bond acceptor.
D)
Pyridine is more polar than benzene.
E)
All of pyridine's atoms are
sp2 hybridized.
insect's compound eye, revealing photoreceptor cells, support cells and pigment cells
Particles measured, 1970 - 2008 and Trend in Organic Compound 1990 - 2007
Fracture and Repair of Bone Open (Compound)
compound
compound