1Water, ammonia, sulfuric acid, deuterium
oxide, ethanol, methanol, acetone,
isopropanol, methyl ethyl ketone, n-
propanol, acetonitrile, DMSO (dimethyl
sulfoxide), and DMF (dimethyl
formamide).
EXAMPLE OF POLAR SOLVENTS
2Chloroform, pentane, hexane, benzene,
toluene, octane, decane, dimethyl ether,
and dichloromethane.
EXAMPLE OF NON POLAR SOLVENTS
3are processes in which non covalent interactions
between identical molecules in a pure
sample are disrupted
Boiling and Melting Point
4The stronger the noncovalent
interactions, the more energy that is
required, in the form of heat, to break
them apart
true
5is the temperature at
which the liquid state of compound is
converted to gaseous state
(vaporization); dependent on
intermolecular forces
Boiling Point
6temperature at which the
solid is converted to a liquid
Melting Point
7influences melting point;
determines how well the individual
molecules in a solid form fit together, the
tighter it is, the greater temperature it
needs to melt
Packing
8The ________ of the compound in
any homologous series increase as their
molecular weights increase in Van Der
Waals Forces
boiling points
9 in a compound lowers its
boiling point because it reduces the area
of contact
Branching
10occurs when one
substance is converted into another
substance
chemical reaction
11is accompanied by
breaking of some bonds and by making
of some others
chemical reaction
12Define as the detailed knowledge of the
steps involved in a process in which
the reactant molecules change into
products
Reaction Mechanism
13Chemical reaction involves breaking of
one or more of the existing chemical
bonds in reactant molecules and
formation of new bonds leading to
products
Reaction Mechanism
14The breaking of a covalent bond is known as
bond fission
15During bond breaking and bond fission,
the two shared electrons can be
distributed equally or unequally between
the two bonded atoms.
true
16The fission of a covalent bond with
equal sharing of bonding electrons
Homolytic Fission
17are neutral but reactive species
having an unpaired electrons and these
can also initiate a chemical reaction
Free Radicals (reactive oxygen
species)
18The fission of a covalent bond
involving unequal sharing of bonding
electrons
Heterolytic Fission
19This types of bond fission results in
formation of ions.
Heterolytic Fission
20The ion which has a positive charge on the carbon atoms, is known as the
carbonium ion or carbocation
21an ion with a negative charge on the carbon atom is
known as the
carbanion
22The charged species obtained by the
heterolytic fission initiate chemical reactions
and they are classified as
electrophiles and nucleophiles
23is an electron deficient species and it may be
positively charged or neutral.
- Examples are H+, N+, O2, Br+, Cl+, Ag+,
CH3 +CO, BF3, etc.
Electrophiles
24 is negatively charged or electron rich
neutral species.
- Examples of nucleophiles are OH–,– NO2, H2O: NH3 etc.
Nucleophiles
25reaction involves the displacement of one atom or group in a molecule by another atom or group.
substitution
26Aliphatic compounds undergo _____ reactions.
nucleophilic substitution
27reaction is characterized
by the removal of a small molecule from
adjacent carbon atoms and the
formation of a double bond.
Elimination
28Unsaturated hydrocarbons such as
alkenes and alkynes are extremely
reactive towards a wide variety of
reagents. The carbon-carbon double
bond (–C=C–) of an alkene contains two
types of bonds. In alkynes, three carbon-
carbon bonds.
Addition
29Attacks Multiple Bonds
Addition
30proceeds with a fundamental change in the
hydrocarbon skeleton of the molecule.
During this reaction, an atom or group
migrates from one position to another.
Molecular Rearrangement