Interpretation:
The structure(s) with which the absolute configuration of
Concept introduction:
An absolute configuration is the three-dimensional spatial arrangement of atoms or groups at the chirality center.
The absolute configuration at the chiral center is assigned on the basis of Cahn-Ingold-Prelog rules. The Cahn-Ingold-Prelog system ranks substituents at the chirality center in the order of decreasing
If this path is clockwise, the absolute configuration is R. If this path is counterclockwise, the absolute configuration is S.
In Fischer projections, the molecule is oriented so that the two vertical bonds at the chirality center are directed away from the viewer and the two horizontal bonds point toward the viewer.
When the connection between absolute configuration and sign of rotation is known, it is a common practice to incorporate both in the name of the compound.
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Chapter 4 Solutions
Organic Chemistry - Standalone book
- Draw structures for the following (a) bicyclo [3,2,0] heptane (b) spiro [4,2] heptanearrow_forward1. Draw structures for a) (2E,4Z) - hepta-2,4-diene b) (S) - 2-bromobutanearrow_forward(b) Draw the structural formula for each of the following compounds. (i) 2,2,3-trimethylpentan-3-ol(ii) 2-methyl-3-phenylbut-2-enal(iii) 5-chloro-2-methylheptan-3-olarrow_forward
- Of the four possible cis,trans isomers, one is formed in over 85% yield. Q.) Which is the structure of the isomer formed in 85% yield? How do you account for its formation? Create a model to help you make this prediction.arrow_forwardQuestion 8 Identify the type of isomer for (R)-3-bromoheptane. O Has to be experimentally determined O Dextrorotatory isomer (+) O Levorotatory isomer (-) Racemic (*)arrow_forwardConstruct models of all the possible stereoisomers of 1,2-dichlorocyclopropane. Using your models, draw structures for and name the isomers. Label each chirality centre R or S. Indicate which pairs are related as enantiomers and which as diastereoisomers.arrow_forward
- 4-methyl-3-hexanol was prepared by reacting an alkene with either hydroboration-oxidation or oxymercuration-reduction. Draw the structure of the alkene that was used to prepare the alcohol in highest yield. • You do not have to consider stereochemistry. • Indicate the method of preparation by drawing either BH3 (for . If there is more than one alkene that can be used for a given method, draw all of them. If either hydroboration-oxidation or oxymercuration-reduction can be used, just give the structures for one method. Separate structures with + signs from the drop-down menu. ● 981 -- 26224 ? ChemDoodle Y hydroboration-oxidation), or Hg (for oxymercuration-reduction), in a separate sketcher. Sn [1arrow_forwardDraw the skeletal (line-bond) structure of [CH3CH2CHCH(O)]-. Include all lone pairs and charges as appropriate.arrow_forwardWrite the basic equilibrium equation for (CH₃)₂NH.arrow_forward
- 4. Write the formula and name for the product when cyclopentene reacts with (a) Cl2(b) HBr(c) H2, Pt (d) H2O, H+arrow_forward6. Dacron is the brand name for the polymer that is made from ethane-1,2-diol and benzene-1,4-dicarboxylic acid. (a) When the two monomers combine, what type of reaction do they undergo and what molecule is eliminated? [1] (b) What is the name for the linkages that join the monomers together? [1] (c) Draw the monomers and the polymer of the reaction to create Dacron. [3]arrow_forwardProvide the bond-line structure of (Z)-4,5-dichloro-2-pentene.arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co