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Example Questions
Example Question #341 : Organic Chemistry
Consider the pictured molecule. Creating a carbocation at which position will give us the most stable carbocation intermediate?
Carbocations are most stable when they are most substituted. The carbon at position 2 is the most substituted carbon on the pictured molecule and would produce a tertiary carbocation. This is due to the fact that R-groups are electron-donating groups, and a carbocation is electron-deficient, thus the more R-groups adjacent to the carbocation, the more stable it will be.
Example Question #45 : Intermolecular Forces And Stability
Of the following, which is the strongest acid?
We can eliminate and right away because they are not a strong acids, while the other answer choices are (memorizing strong acids and bases is recommended in most organic chemistry courses).
From here, we can methodically find the correct answer by comparing each answer choice's conjugate base. It is easier to compare base strength than acid strength and the stronger an acid's conjugate base, the weaker the acid (vice versa).
is the largest conjugate base of the two choices. In this case, the large size of the bromine ion allows the negative charge to be dispersed more through the atom, providing stability. This stability makes it the weakest conjugate base and the strongest acid.
Example Question #271 : Organic Concepts
What is the order of increasing stability for the following ions going from least to greatest?
1.
2.
3.
4.
The bigger the ion, the more stable it is, because the negative charge is distributed over a larger area.
Example Question #342 : Organic Chemistry
Which of the following statements best explains why the element carbon can make up the structure of a plethora of compounds?
Carbon readily forms ionic bonds with other carbon atoms
Carbon atoms have very high electronegativity, a characteristic which allows them to bond with other atoms
Carbon can form up to four covalent bonds, often with other carbon atoms
Carbon atoms combine very readily with oxygen atoms
Carbon can form up to four covalent bonds, often with other carbon atoms
Carbon is a tetravalent element, meaning it can form up 4 covalent bonds with other elements, especially other carbon atoms. This allows for the formation of many different carbon-containing elements of differing sizes, shapes, and structures.
Example Question #342 : Organic Chemistry
Which of the following compounds is a saturated hydrocarbon?
Propyne
Propene
Propane
Benzene
Propane
By definition, a saturated hydrocarbon is a compound that contains no double or triple bonds-all single bonds. Of these choices, propane (-ane suffix indicates that it is an alkane, which contains only single bonds) is the only saturated hydrocarbon.
Example Question #343 : Organic Chemistry
Hexane is an example of an __________ solvent.
polar protic
polar aprotic
nonpolar protic
nonpolar aprotic
nonpolar aprotic
Hexane is a hydrocarbon consisting of 6 carbon atoms and 12 hydrogen atoms, making it nonpolar. Because it has no donatable hydrogen ions, it is also considered aprotic.
Example Question #274 : Organic Concepts
What substituent in the X-position would result in the product?
The inductive effect of the group stabilized the carbocation further away from the electron withdrawing group, causing the addition of the to occur there.
Example Question #343 : Organic Chemistry
How many sigma bonds does a double bond contain?
None
A double bond contains one sigma bond and one pi bond.
Example Question #52 : Intermolecular Forces And Stability
How many sigma and pi bonds does a triple bond contain?
and
and
and
and
and
and
A triple bond contains 2 pi bonds and a single sigma bond.
Example Question #344 : Organic Chemistry
Which of the following functional groups would stabilize a Grignard reagent?
A Grignard reagent is equivalent to a carbanion. Electron withdrawing groups help stabilize the negative charge on the carbon while electron donating groups will destabilize it. Therefore, is the only correct answer.
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