Concept explainers
Interpretation:
The chiral center in the molecular model of thalidomide is to be identified and its absolute configuration as R or S is to be determined.
Concept introduction:
When a tetrahedral carbon atom is connected to four different atoms or groups, then that carbon is called a chiral carbon or chiral center.
The absolute configuration is the three-dimensional spatial arrangement of substituents attached to a chiral center.
The Cahn-Ingold-Prelog rule system lists the substituents bonded to the chiral center in the order of decreasing atomic number. A higher atomic number has a higher priority over a lower atomic number for the substituent.
When there are two identical atoms directly attached to the chirality center, then they are ranked on the basis of the
If an atom has multiple bonds, it is considered to be replicated as a substituent on that atom.
If isotopes are present, they are ranked on the basis of their
The molecule is oriented such that the lowest ranked group points away from the observer.
If the remaining three groups in order of decreasing priority trace a clockwise path, the configuration is R.
If the remaining three groups in order of decreasing priority trace a counter clockwise path, the configuration is S.
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Organic Chemistry - Standalone book
- Complete boxes in the flow chart. Draw the structure of the organic compound foundin each layer after adding 3M NaOH and extraction. Make sure to include any charges. Provide explanation on answers.arrow_forward== Vid4Q2 Unanswered ☑ Provide IUPAC name of product in the reaction below A 3,4-dimethylcyclohexene B 1,2-dimethylcyclohexane C 1,2-dimethylcyclohexene D 3,4-dimethylcyclohexane H₂ Pdarrow_forward5. Use the MS data to answer the questions on the next page. 14.0 1.4 15.0 8.1 100- MS-IW-5644 26.0 2.8 27.0 6.7 28.0 1.8 29.0 80 4.4 38.0 1.0 39.0 1.5 41.0 1.2 42.0 11.2 43.0 100.0 44.0 4.3 79.0 1.9 80.0 2.6 Relative Intensity 40 81.0 1.9 82.0 2.5 93.0 8.7 20- 95.0 8.2 121.0 2.0 123.0 2.0 136.0 11.8 0 138.0 11.5 20 40 8. 60 a. Br - 0 80 100 120 140 160 180 200 220 m/z Identify the m/z of the base peak and molecular ion. 2 b. Draw structures for each of the following fragments (include electrons and charges): 43.0, 93.0, 95.0, 136.0, and 138.0 m/z. C. Draw a reasonable a-fragmentation mechanism for the fragmentation of the molecular ion to fragment 43.0 m/z. Be sure to include all electrons and formal charges. 6. Using the values provided in Appendix E of your lab manual, calculate the monoisotopic mass for the pyridinium ion (CsH6N) and show your work.arrow_forward
- Nonearrow_forwardStereochemistry: Three possible answers- diastereomers, enantiomers OH CH₂OH I -c=0 21108 1101 41745 HOR CH₂OH IL Но CH₂OH TIL a. Compounds I and III have this relationship with each other: enantiomers b. Compounds II and IV have this relationship with each other: c. Compounds I and II have this relationship with each other: d. *Draw one structure that is a stereoisomer of II, but neither a diastereomer nor an enantiomer. (more than one correct answer)arrow_forwardNonearrow_forward
- Don't used Ai solutionarrow_forwardIn mass spectrometry, alpha cleavages are common in molecules with heteroatoms. Draw the two daughter ions that would be observed in the mass spectrum resulting from an alpha cleavage of this molecule. + NH2 Q Draw Fragment with m/z of 72arrow_forwardDon't used Ai solution and don't used hand raitingarrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning