Chapter 7 Alkynes by https://padlet.com/s65333/535ysgk07ibw3ufr en-us 2023-01-14 10:04:50 UTC 2023-01-14 15:36:21 UTC hello@padlet.com structure alkynes s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444338837
>contain carbon-carbon triple bond.
>consists of 2 pi bond and 1 sigma bond.]]> 2023-01-14 14:06:49 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444338837 Naming of alkynes s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444339680
>IUPAC system,change from -ane ending of parent name to -yne for alkynes. 
>choose longest continuous chain and number chain to give the triple bond the lower number. 
>the chain is numbered to give the first site of saturation the lower number. 
(two triples bond-diynes, 
three triples bond-triyes)]]> 2023-01-14 14:09:05 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444339680 Preparation of alkynes s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444340531
prepared by elimination reactions,a strong base removes two equivalents of Hx form a vicinal or geminal dihalide to yield an alkynes through two successive E2 elimination reaction.
(Hx,x=Cl,Br,I)]]> 2023-01-14 14:11:40 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444340531 Cyclic alkynes s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444341344
unstable : carbon chain must be long enough to connect the two ends of the triple bond without introducing too much strain.]]> 2023-01-14 14:13:52 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444341344 What is ALKYNES?? s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444342119 2023-01-14 14:16:06 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444342119 Strength of ALKYNES bonds: s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444351220 >sp hybridized with linear geometry and bond angles of 180 -unsaturated hydrocarbon.
>when sigma bond more bigger than pi bond so the triple bond more easily broken. 
>alkynes are more polarized than alkenes because electron more losely held. ]]> 2023-01-14 14:40:36 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444351220 Physical properties s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444353721
>resemble those of hydrocarbons of similar shape and molecular weight. 
>melting points and boiling points increases when the number of carbon increases. 
>soluble in organic solvent and insoluble in water.]]> 2023-01-14 14:47:40 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444353721 addition reactions of alkenes s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444354103 2023-01-14 14:48:46 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444354103 synthesis using ALKYNES s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444360721 >to consider HOW to prepare a five-carbon product from three smaller precursor molecules using the reaction.]]> 2023-01-14 15:05:38 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444360721 Internal vs Terminal ALKYNES s65333 https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444372982 2023-01-14 15:35:17 UTC https://padlet.com/s65333/535ysgk07ibw3ufr/wish/2444372982