Which of the following alkene addition reactions occur/s specifically in syn fashion? Dihydroxylation using OsO4, H2O2 Addition of H2 Hydroboration All of the above
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- Which of the following alkene addition reactions occur specifically in an anti fashion? Hydroboration-oxidation Addition of Br2 Addition of H2 Addition of H2O in dilute acidIn organic chemistry, an elimination process involves the removal of the hydrogen and a halide (i.e. dehydrohalogenation), in which they are ___ to each other, forming an alkene. syn-orientation co-periplanar anti-periplanar Z- orientationZaitsev's Rule refers to: which alkene is favored in a product mixture O how resonance contributors stabilize cations/anions/radicals O the stereochemistry of reaction intermediates/transition states O the stability of carbocation intermediates
- CH3 CH3 Br- Br2 .CH3 CH2Cl2 CH3 H3C H3C Br Electrophilic addition of bromine, Brɔ, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH,Cl,. In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions CH3 CH3 CH3 CH3 H3C H3C :Br: :Br:3) Draw the structures of the major organic product(s) for the following reactions. HI in CH₂Cl₂ 3 excess Cl₂ in H₂O H₂SO4 in H₂O (Two products) Br-Cl in THF 1) BH3 2) alkaline H₂O₂ OSO4 + HOOHWhat is the component formed during the hydroboration (BH3, ) oxidation of an alkyne trialkenyl borane osmate carbocation trialkylborane Boranyl cation
- Which of the following additions to alkenes occur(s) specifically in an anti fashion? I am referring to anti/syn stereochemistry in this question, not the Markovnikov-based regiochemistry. O addition of H2 O halohydrin formation O hydroboration-oxidation O dihydroxylation using OsO4Review Topics] [References] Draw a structural formula for the major product of the reaction shown. CH;CH2 c=CHCH3 CH;CH2 Br2 H20 • Show product stereochemistry IF the reactant alkene has both carbons of the double bond within a ring. • Do not show stereochemistry in other cases. • If the reaction produces a racemic mixture, just draw one stereoisomer. Previous Next ChemDoodle Save and Ex tv ill I 11 МacBook Air DII DD F12 F11 F10 80 888 F9 F7 FB F6 F5 F4 F3 * & $ %3D 5 6. 7 8 9. 4 { P E R T Y H J K F + * CO2. Which of the following additions to alkenes occur(s) specifically in a syn fashion? A) dihydroxylation using OsO4, H2O2 B) addition of H2 C) hydroboration D) addition of HCI E) A, B, and C
- Which represents an efficient synthetic route to go from an alkane to an alkene? O elimination with NaNH2, followed by a water workup O anti-Markovnikov hydrohalogenation, followed by elimination O radical bromination, followed by elimination O hydration, followed by elimination O hydration, followed by ozonolysis of the double bondWhich of the following additions to alkenes occur(s) specifically in an anti fashion? O hydroboration-oxidation addition of H20 in dilute acid addition of Br2 O addition of H2O in dilute acid Both A and C1) Predict the product(s) of the following alkene addition reactions. Be sure to show stereochemistry where applicable and draw out all stereoisomers formed in the reaction. HNO3 H2SO4 Br2 FeBr3 sO3 CI, AICI3 H2SO,