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Organic Chem Portage 1 Exam 2024/2025 Questions With Completed & Verified Solutions.
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Organic Chem Portage 1 Exam 2024/2025 Questions With Completed & Verified Solutions.
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Organic Chem Portage 1A) Covalent (purely)
B) Ionic
C) Polar covalent
D) Polar covalent
E) Polar covalent
Classify the bonding between the given pairs of atoms as ionic, covalent, or polar covalent. Use
the table of electronegativities shown below to help with the classification.
a. Br and Br
b. K and Cl
c. P and Cl
d. C and O
e. Na and Br
Two (or more) different chemical compounds with the same molecular formula but different
connectivity between the atoms in their structural formulae.
Define the term constitutional isomer.
Compound A and Compound B are constitutional isomers of each other because they each
have 3 carbons that have 4 bonds, they each have 6 hydrogens forming 1 bond with a carbon,
and they each have 1 oxygen double-bonded to a carbon atom - however, the oxygen molecule
is bonded
to the 2nd carbon in Compound A, while the oxygen molecule is bonded to the 3rd carbon in
compound B; resulting in a different isomer
Explain (using specific evidence) what makes the following two compounds constitutional
isomers of one another:
4
On a piece of scratch paper, write out structural formulae for all of the constitutional isomers
possible for the MF C3H6F2. How many isomers are possible for this formula?
a) C5H10
b) C3H8O
c) C4H10O
Write the molecular formula for each of the compounds whose bond-line formulae are given
below.
, B.
Which bond-line formula shown below represents a constitutional isomer of
CH3CH2CH2CH2CH3?
The formal charge on Carbon is -1. C = 4 - (2+3) = -1
The formal charge on Oxygen is +1. O = 6 - (2+3) = +1
The overall charge on the molecule would be 0 (neutral) because -1 +1 = 0
The compound carbon monoxide has the following structural formula: What is the formal charge
on the carbon and the oxygen? Show your calculation. What is the overall charge on the
molecule?
Structure A would represent a "major" resonance contributor to the hybrid because the Carbon
atom's each have complete valence as opposed to Structure B which now the middle Carbon
atom has one lone pair and now a negative charge.
For the following example of resonance: Which structure (a or b) represents a "major"
resonance contributor to the hybrid? Briefly explain why.
Individual resonance structures impact the true structure of a molecule or polyatomic ion
because they change the way electrons are allocated and therefore the number of bonds for an
individual atom within the molecule.
Describe how individual resonance structures impact the true structure of a molecule or
polyatomic ion.
S orbitals are spherical (single lobe), while P orbitals are dumbbell-shaped (two lobes).
Describe the shapes associated with the atomic orbitals associated with the main elements of
organic chemistry.
Atoms form bonds by overlapping individual atomic orbitals from each atom to produce
molecular (bonding) orbitals.
Explain how bonds are formed between atoms from the perspective of atomic orbital theory.
A) Tetrahedral - 109.5
B) Trigonal Planar - 120
C) Trigonal Pyramidal - 107
D) Angular - 105
Using the VSEPR method, predict the molecular geometry (shape and bond angle) around the
indicated atoms for the following structure:
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