Borane adducts with phosphines and amines are also available, but are not widely used. 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+. Created by. Alkene and Alkyne Reaction Reagants + Solvents. STUDY. Draw the structure of the alkyne (containing only carbon and hydrogen atoms). The alkyne has two pi bonds and both are capable of reacting with borane (BH 3). 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+. BH 3 (Borane) As A Reagent For Hydroboration Of Alkenes (And Alkynes). Start studying Alkene and Alkyne Reaction Reagants + Solvents. Test. Upgrade to remove ads. Create. 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 . 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. Spell. See the answer. To limit the reactivity to only one of the pi bonds within the alkyne, a dialkyl borane reagent (R 2 BH) is used. It degrades with time. This problem has been solved! 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. 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. Gravity . PLAY. An acceptable reactant/reagent combination for this is: 1. 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. "NaOH"(aq), "H"_2"O"_2 Notice that the aqueous label is necessary because water does participate in this reaction at the end. Match. Learn. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Log in Sign up. Depending on the alkyne's triple bond location, you get either an aldehyde or a ketone after keto-enol tautomerization. The adduct BH 3 (THF) is also commercially available as THF solutions wherein it exists as the 1:1 adduct. Search. Only $2.99/month. "BH"_3 complexed with "THF" (Tetrahydrofuran), generally written as "BH"_3"/THF". Draw the structure. 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:. 2. Borane makes a strong adduct with triethylamine; using this adduct requires harsher conditions in hydroboration. Write. Browse. Flashcards. mailys_angibaud. Log in Sign up.