Draw The Structure. Log in Sign up. "NaOH"(aq), "H"_2"O"_2 Notice that the aqueous label is necessary because water does participate in this reaction at the end. Match. Create. Test. Learn. Created by. Replacing two of the hydrogens on the borane with alkyl groups also creates steric hindrance so that the hydroboration reaction produces the regioselective, anti-Markovnikov product. Depending on the alkyne's triple bond location, you get either an aldehyde or a ketone after keto-enol tautomerization. Today’s reagent is a staple of Org 1 and the key representative of a genuinely useful process being used every day in laboratories worldwide. To limit the reactivity to only one of the pi bonds within the alkyne, a dialkyl borane reagent (R 2 BH) is used. Start studying Alkene and Alkyne Reaction Reagants + Solvents. An alkyne of six carbon atoms gives the same single product in its reaction either BH3 in THF followed by H2O2/OH- or with H2O/Hg2+/H3O+. Upgrade to remove ads. An alkyne of six carbon atoms gives the same single product in its reaction either with BH3 in THF followed by H2O2 /OH–, or with H2O/Hg2 /H3O . "BH"_3 complexed with "THF" (Tetrahydrofuran), generally written as "BH"_3"/THF". The adduct BH 3 (THF) is also commercially available as THF solutions wherein it exists as the 1:1 adduct. 2. Spell. mailys_angibaud. Log in Sign up. Write. It is a few-steps transformation that starts from the addition of borane (BH 3) to the alkene.This is called hydroboration and it is an electrophilic addition to the alkene. BH 3 (Borane) As A Reagent For Hydroboration Of Alkenes (And Alkynes). Gravity . Browse. Search. Only $2.99/month. The alkyne has two pi bonds and both are capable of reacting with borane (BH 3). Draw the structure of the alkyne (containing only carbon and hydrogen atoms). Borane adducts with phosphines and amines are also available, but are not widely used. Hydroboration-oxidation converts alkenes into alcohols: THF (tetrahydrofuran) is the solvent that is used to stabilize the dimer of BH 3 which is a flammable, toxic, and explosive gas:. PLAY. An acceptable reactant/reagent combination for this is: 1. See the answer. It degrades with time. STUDY. Flashcards. Alkene and Alkyne Reaction Reagants + Solvents. This problem has been solved! Draw the structure. Question: An Alkyne Of Six Carbon Atoms Gives The Same Single Product In Its Reaction Either BH3 In THF Followed By H2O2/OH- Or With H2O/Hg2+/H3O+. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Borane makes a strong adduct with triethylamine; using this adduct requires harsher conditions in hydroboration. BH3 (Borane) In a blatant plug for the Reagent Guide, each Friday I profile a different reagent that is commonly encountered in Org 1/ Org 2.