Concept explainers
Interpretation:
The Fischer projection formula of the aldotetrose represented by the model is to be drawn and the configuration as R or S is to be assigned to each chirality center.
Concept introduction:
In Fischer projection formula, a tetrahedral carbon is represented by two crossed lines. The horizontal line represents bonds coming out of the page and vertical lines represent bonds moving in to the page.
For assigning R or S configuration, the four groups attached to the chiral center are arranged in the order of priority by applying sequence rules. The molecule is then oriented in such a way that the group of lowest priority points away from the viewer. If the arrangement of highest priority to second highest priority to third highest priority is clockwise then R configuration is assigned. If the arrangement of highest priority to second highest priority to third highest priority is counterclockwise then S configuration is assigned.
To draw:
The Fischer projection formula of the aldotetrose represented by the model and to assign the configuration as R or S to each chirality center.
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Chapter 25 Solutions
Organic Chemistry
- What is the relationship between the parent structure on the left and the structure on the right? HO O O O COOH H H-OH B A: Enantiomers B: Diastereomers C: Completely unrelated molecules D: Identical molecules CH₂OH HO HO COOH H H CH₂OHarrow_forwardCOOH What is the relationship between the parent structure on the left and the structure on the right? HTOH COOH тон H-OH HO H CH₂OH H― OH CH2OH A: Enantiomers B: Diastereomers C: Completely unrelated molecules D: Identical molecules OA oc OD Barrow_forwardIs the chirality center R or S?arrow_forward
- Redraw the following molecule and assign R or S configuration to each chirality center. CH₂OH HO H H OH HO H CH₂OHarrow_forwardThe following compound has how many stereogenic centers? CH3arrow_forwardDetermine the configuration of each stereogenic center in the compound below, highlight the carbon in red if the configuration is R and in blue, if the configuration is S.arrow_forward
- 1. Give the number of stereogenic centers in the pain reliever Met-enkephalin, mark the corresponding stereogenic centers with an asterisk. H₂N. OH HO S I CH3arrow_forwardWhich of the following structure identifies as D stereoisomer? CHO CHO СНО it: НО H- H-OH OH Но -H- но H. ČH2OH ČH2OH CH2OH A C A B and C A and B エエarrow_forwardH Ph HCI H₂O cat HCI H₂O 1 enantiomer (1 chiral compound) 1:1 mix of enantiomers mixture of diastereomers achiral 1 enantiomer (1 chiral compound) 1:1 mix of enantiomers mixture of diastereomers achiralarrow_forward
