Fill in the boxes with the product of the following reactions of alkenes. Draw only the PREDOMINANT REGIOISOMER and indicate stereochemistry with wedges and dashes where appropriate. When a racemic mixture is formed you must draw both enantiomers and write RACEMIC in the box. علا Br2 Br2 Br2/H₂O Br2 Br2/H₂O
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- (c) Draw an accurate representation, using dashes and wedges to show stereochemistry, of (3R,4R)-3,4-dibromo-1-pentyneа-pinene When a-pinene reacts with 1. ВН3; 2. На О2, NaOH, Н2О 4 possible cis,trans isomers can be formed, but one of these is formed in over 85% yield. Draw the structure of this preferred isomer. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • To aid you in your drawing, the structure of a-pinene is provided for you in the drawing palette.For the following reactions, fill in the boxes with the predominant product or products. You must indicate stereochemistry with wedges and dashes. If a racemic mixture is created, you must write "racemic" under the structures.
- Fill in the following missing organic structures. Consider stereochemistry (R/S and/or E/Z –cis/trans) and possible carbocation rearrangements.An alkene having the molecular formula C,H12 is treated sequentially with ozone (O3) and zinc/acetic acid to give the product/s shown. CH3CH2CH,CH½CH2CH Draw a structural formula for the alkene. You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. P opy aste Previous NextAn alkene having the molecular formula C5H10 is treated sequentially with ozone (O3) and zinc/acetic acid to give the product/s shown. H3C O CH3CHCH + H. Draw a structural formula for the alkene. You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. In cases where there is more than one answer, just draw one. P opy aste [* Previous Next
- Draw the structure(s) of all of the alkene isomers, C5H10, that contain a branched chain. Consider E/Z stereochemistry of alkenes.Which of the following statements is/are true regarding Alkene A and the products of an ozonolysis (O_(3)) reaction? (i) One of the alkene carbon atoms of alkene A is disubstituted and the other is monosubstituted (ii) One of the alkene carbon atoms of alkene A is monosubstituted and the other is unsubstituted (iii) Ozonolysis of alkene A followed by work up under reductive conditions gives products 1 and 2, but if work up is under oxidative conditions products 1 and 3 form (iv) Ozonolysis of alkene A followed by work up under reductive conditions gives products 1 and 3 but if work up is under oxidative conditions products 1 and 2 form.. a. (i) and (iii) are truea-pinene When a-pinene reacts with 1. BH3; 2. H₂O2, NaOH, H₂O 4 possible cis,trans isomers can be formed, but one of these is formed more readily than the others. Draw the structure of this preferred isomer. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • To aid you in your drawing, the structure of a-pinene is provided for you in the drawing palette.
- Complete the following reaction by drawing a structural formula for the product. CH,CH, (1) NABH4 ? (2) H30* • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms.a) When (Z)-3-methylhex-3-ene undergoes hydroboration–oxidation, two isomeric products are formed. Give their structures, and label each asymmetric carbon atom as (R) or (S). What is the relationship between these isomers?Draw the skeletal line-bond structure of (R)-4-isopropoxyoctane. Include a dash or wedge bond to indicate stereochemistry of substituents.