Call Now to Set Up Tutoring:

(888) 888-0446

Organic Chemistry : Organic Chemistry

Study concepts, example questions & explanations for Organic Chemistry

Create An Account

All Organic Chemistry Resources

6 Diagnostic Tests 179 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #32 : Stereochemistry

Cholic acid

How many possible stereoisomers does the molecular framework of cholic acid (shown) have?

Possible Answers:

$2^{9}$

$2^{11}$

$2^{12}$

$2^{10}$

$2^{13}$

Correct answer:

$2^{11}$

Explanation:

Cholic acid 3d

There are 11 stereocenters, because here there are 11 asymmetric carbons and no E/Z isomerisms, nor planes of symmetry. For compounds with no meso isomers or E/Z isomerisms, the possible number of stereoisomers is 2^n where is the number of stereocenters.

Report an Error

Example Question #32 : Stereochemistry

Cholic acid derivative

How many stereocenters does this steroid derivative have?

Possible Answers:

Correct answer:

Explanation:

There are 11 asymmetric carbons and one E double bond, so there are 13 stereocenters in total. For each E/Z isomerism, there are 2 stereocenters.

Cholic acid derivative 3d

Report an Error

Example Question #13 : Help With Enantiomers

Cholic acid derivative

How many possible stereoisomers does the following steroid derivative have?

Possible Answers:

$2^{12}$

$2^{14}$

$2^{10}$

$2^{11}$

$2^{13}$

Correct answer:

$2^{12}$

Explanation:

Here there are 11 asymmetric carbons and one E/Z isomerism.

So, the number of possible stereocenters from asymmetric carbons is $2^{11}$ , and the number of possible stereoisomers from E/Z isomerisms is .

Thus the number of stereoisomers from asymmetric carbons is doubled, and $2^{11}*2 =$ $2^{12}$ possible stereoisomers

Cholic acid derivative 3d

Report an Error

Example Question #391 : Organic Chemistry

What is the IUPAC name for the given organic molecule?

Screen shot 2015 09 21 at 1.19.58 pm

Possible Answers:

(2R, 4S)-4,5,5-trimethylhexan-2-ol

(2R, 4R)-4,5,5-trimethylhexan-2-ol

(3R, 5R)-2,2,3-trimethylhexan-5-ol

(2S, 4R)-4,5,5-trimethylhexan-2-ol

(3S, 5R)-2,2,3-trimethylhexan-5-ol

Correct answer:

(2R, 4S)-4,5,5-trimethylhexan-2-ol

Explanation:

The absolute configuration around carbons 2 and 4 is R and S, respectively. The molecule is a hexanol, and the numbering starts with the carbon closest to the hydroxyl group.

Report an Error

Example Question #392 : Organic Chemistry

Which of the following structures is equivalent to the enantiomer of the molecule whose Fischer Projection is shown below?

Screen shot 2015 09 21 at 2.08.29 pm

Screen shot 2015 09 21 at 2.20.32 pm

Possible Answers:

III

Correct answer:

Explanation:

The compound shown is SS, so we need to look for the compound that is RR.

Report an Error

Example Question #393 : Organic Chemistry

What is the Fischer projection of the following molecule?

Screen shot 2015 11 09 at 3.48.42 pm

Screen shot 2015 11 09 at 3.59.36 pm

Possible Answers:

III

Correct answer:

Explanation:

The absolute configuration of the given molecule is 2S,3R (amino group is R, methyl group is S). Putting the methyl group on the top and the alcohol on the bottom, this puts the amino group on the left, and the methyl group on the right. Recall that in the Fischer projection, the vertical bonds are dashed and are going into the plane of the screen/paper, while the horizontal bonds are wedges and are coming out of the plane of the screen/paper. One way to remember this is to think of Fischer projections as a skeleton (dashed vertical) wearing a bowtie (wedged horizontal).

Report an Error

Example Question #394 : Organic Chemistry

What is the IUPAC name for the molecule shown?

Screen shot 2015 11 09 at 4.10.48 pm

Possible Answers:

S-3-methylbut-1-en-4-ol

S-2-methylbut-3-en-1-ol

R-2-methylbut-3-en-1-ol

R-3-methylbut-1-en-4-ol

Correct answer:

S-2-methylbut-3-en-1-ol

Explanation:

The molecule's highest priority functional group is the -OH group, therefore, numbering starts at the left-most carbon. The absolute configuration of the molecule at carbon is S.

Report an Error

Example Question #44 : Stereochemistry

What is the IUPAC name for the molecule shown?

Screen shot 2015 11 12 at 6.01.33 pm

Possible Answers:

(2R,3S)-3-methyl-2-pentanol

(2S,3S)-3-methyl-2-pentanol

(2S,3R)-3-methyl-2-pentanol

(2R,3R)-3-methyl-2-pentanol

Correct answer:

(2R,3S)-3-methyl-2-pentanol

Explanation:

Carbon number : hydroxyl is first priority, The rest of the molecule is second, methyl is third. Placing in back makes $1\rightarrow 2\rightarrow 3$ go clockwise. Therefore, it is R. Carbon number : alkyl with hydroxyl is first priority, The rest of the molecule is second, methyl is third. Placing in back makes $1\rightarrow 2\rightarrow 3$ go counterclockwise. Therefore, it is S.

Report an Error

Example Question #395 : Organic Chemistry

Which of the following applies to the molecule shown?

Screen shot 2015 11 09 at 5.11.34 pm

Possible Answers:

Correct answer:

Explanation:

Aldehyde group gets first priority; therefore, aldehyde carbon is carbon number . Aldehyde group is first priority, alkyne group is second priority, methyl group is third priority. $1\rightarrow 2\rightarrow 3$ is clockwise, so the molecule is R.

Report an Error

Example Question #396 : Organic Chemistry

What is the IUPAC name of the molecule below?

Screen shot 2015 11 09 at 5.21.30 pm

Possible Answers:

R-2-butanamine

R-3-butanamine

S-3-butanamine

S-2-butanamine

Correct answer:

R-2-butanamine

Explanation:

At the chiral carbon, the amino group is first priority, the ethyl group is second priority, and the methyl group is third priority. $1\rightarrow 2\rightarrow 3$ is clockwise when putting H in the back, so the molecule is R.

Report an Error

View Organic Chemistry Tutors

Tamera
Certified Tutor

Christopher Newport University, Bachelor of Science, Biochemistry.

View Organic Chemistry Tutors

Shrikar
Certified Tutor

University of South Florida-Main Campus, Bachelor of Science, Biomedical Sciences.

View Organic Chemistry Tutors

Zehra
Certified Tutor

Albion College, Bachelor, Biochemistry . Wayne State University, Master's/Graduate, Medicine .

All Organic Chemistry Resources

6 Diagnostic Tests 179 Practice Tests Question of the Day Flashcards Learn by Concept

Organic Chemistry Tutors in Top Cities:

Popular Courses & Classes

SSAT Courses & Classes in Atlanta, LSAT Courses & Classes in Boston, GRE Courses & Classes in Miami, GMAT Courses & Classes in Seattle, SSAT Courses & Classes in San Francisco-Bay Area, GRE Courses & Classes in San Diego, ACT Courses & Classes in San Diego, ISEE Courses & Classes in Phoenix, ACT Courses & Classes in Philadelphia, LSAT Courses & Classes in Denver

Popular Test Prep

LSAT Test Prep in Dallas Fort Worth, GRE Test Prep in Denver, SSAT Test Prep in New York City, GRE Test Prep in San Francisco-Bay Area, SAT Test Prep in New York City, ISEE Test Prep in New York City, ACT Test Prep in Philadelphia, ACT Test Prep in San Diego, ACT Test Prep in New York City, SAT Test Prep in Atlanta

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

Organic Chemistry : Organic Chemistry

Study concepts, example questions & explanations for Organic Chemistry

All Organic Chemistry Resources

Example Questions

Example Question #32 : Stereochemistry

Example Question #32 : Stereochemistry

Example Question #13 : Help With Enantiomers

Example Question #391 : Organic Chemistry

Example Question #392 : Organic Chemistry

Example Question #393 : Organic Chemistry

Example Question #394 : Organic Chemistry

Example Question #44 : Stereochemistry

Example Question #395 : Organic Chemistry

Example Question #396 : Organic Chemistry

All Organic Chemistry Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: