Concept explainers
(a)
Interpretation: The maximum number of stereoisomers possible for a compound with three stereogenic centers is to be calculated.
Concept introduction: A compound exhibits number of stereoisomers when it contains more than one stereogenic centers. The maximum number of stereoisomers a compound with
(b)
Interpretation: The maximum number of stereoisomers possible for a compound with three stereogenic centers is to be calculated.
Concept introduction: A compound exhibits number of stereoisomers when it contains more than one stereogenic centers. The maximum number of stereoisomers a compound with
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- Which statements are true about constitutional isomers? (a) They have the same molecular formula. (b) They have the same molecular weight. (c) They have the same order of attachment of atoms. (d) They have the same physical propertiesarrow_forwardIndicate whether the pair of structure shown represent stereoisomers, constitutional isomers, different conformations of the same compound, or the same conformations of a compound viewed from a different perspective. Note that cis, trans isomers are an example of stereoisomers.arrow_forwardDraw and name the seven aldehydes and ketones with the formula C5H10O. Which are chiral?arrow_forward
- (9) How many chiral centers are present in a molecule of 1,3-dimethylcyclohexane? (C) 2 (D) 3 1 (A) O (10) What is the percent composition of a mixture of (S)-(+)-2-butanol, [a] = +13.52°, and (R)-(-)-2-butanol, [a] = -13.52°, with a specific rotation [a]D = -6.76° (A) 75%R 25%S (B) 25%R 75%S (C) 50%R 50%S 67%R 33%Sarrow_forwardWhich compounds contain chiral centers? (a) 2-Chloropentane (b) 3-Chloropentane (c) 3- Chloro-1-pentene (d) 1,2-Dichloropropanearrow_forward4. Isomers and Stereocenters ( (a) Assign each set of molecules as constitutional isomers, conformational isomers, enantiomers, diastereomers, or identical. Please write the full name for the type. Molecules Type (b) H₂Ca HgC.. CH3 OCH₂ CH3 af OCH, SP H₂C**** H₂C H₂C NGOCH, H.C_OCKS OCH₂ CH₂ H₁C HC H*** CI H H CI Br H3C CH₂ Br (d) E) (0) For each of the following molecules, write the number of stereocenters and circle the center of any stereocenters. (i) (ii) H₂C (онт (eg 5) (b) -CH3 Isegna CH3 on mots eno H₂C CH3arrow_forward
- (a) Draw the products of molecular formula C3H4Cl2, including stereoisomers, formed when chlorocyclopropane is heated with Cl2. (b)Assuming that compounds that have different physical properties are separable, how many fractions would be present if the mixture of products were distilled using an efficient fractional distillation? (c) How many fractions would be optically active?arrow_forwardConsider 1-bromopropane, CH3CH2CH2Br. (a) Draw a Newman projection for the conformation in which CH3 and -Br are anti (dihedral angle 180°). (b) Draw Newman projections for the conformations in which - CH3 and -Br are gauche (dihedral angles 60° and 300°). (c) Which of these is the lowest energy conformation? (d) Which of these conformations, if any, are related by reflection?arrow_forwardLabel the two stereogenic centers in each compound and draw all possible stereoisomers: (a) CH;CH2CH(CI)CH(OH)CH,CH3; (b) CH;CH(Br)CH,CH(CI)CH3.arrow_forward
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