Module 7 chem 219 Portage (Final TEST
prep) WITH QUIZ AND ANSWERS.
, Heterocycles - correct ans:cyclic organic molecule where one or more carbon
atoms are replaced by heteroatoms
Heteroatoms - correct ans:Atoms in an organic compound other than carbon
and hydrogen
Ex: Oxygen, Nitrogen, Sulfur
Two main subgroups of heterocycles - correct ans:1. aromatic
2. aliphatic (non-aromatic)
Pyridine - correct ans:analogue of benzene where one C is replaced by N
geometry of pyridine - correct ans:flat/ planar geometry with 120 degree
bond angles
atomic structure of pyridine - correct ans:sp2 hybridized atoms, 6 P electrons
just like benzene
resonance structure of pyridine - correct ans:
Why does pyridine undergo substitution rather than addition? - correct
ans:addition would destroy the aromaticity
solubility of pyridine - correct ans:soluble in most organic solvents and
completely soluble in water
why is pyridine soluble in water? - correct ans:-ability of pyridine to accept
hydrogen bonding interactions from water molecules d/t the lone pair of
electrons on the nitrogen.
- electronegative N creates a relatively strong dipole moment in the pyridine,
thus making it an apolar compound overall.
prep) WITH QUIZ AND ANSWERS.
, Heterocycles - correct ans:cyclic organic molecule where one or more carbon
atoms are replaced by heteroatoms
Heteroatoms - correct ans:Atoms in an organic compound other than carbon
and hydrogen
Ex: Oxygen, Nitrogen, Sulfur
Two main subgroups of heterocycles - correct ans:1. aromatic
2. aliphatic (non-aromatic)
Pyridine - correct ans:analogue of benzene where one C is replaced by N
geometry of pyridine - correct ans:flat/ planar geometry with 120 degree
bond angles
atomic structure of pyridine - correct ans:sp2 hybridized atoms, 6 P electrons
just like benzene
resonance structure of pyridine - correct ans:
Why does pyridine undergo substitution rather than addition? - correct
ans:addition would destroy the aromaticity
solubility of pyridine - correct ans:soluble in most organic solvents and
completely soluble in water
why is pyridine soluble in water? - correct ans:-ability of pyridine to accept
hydrogen bonding interactions from water molecules d/t the lone pair of
electrons on the nitrogen.
- electronegative N creates a relatively strong dipole moment in the pyridine,
thus making it an apolar compound overall.
