1What does hydroboration do in alkenes and alkynes.
It is a 2 step process that proceeds in antimarchovikov manner and is used to create alcohols in alkenes and aldehydes and ketones in alkynes.
2Addition of carbon bonds to alkyne
1. NaNH2(l) -78 celsius 2. R-Br
3Alkenes. HBr Addition antimarkovikov reactants
1. 1 mol HBr 2. 1 mol H2O2
4Alkene. Hydration reactants
H2O and H2SO4
5Alkene. Alcohol addition reactants
R-OH and H2SO4
6Alkenes. HX addition 1eq reactants
1 mol of HCl or HBr
7What does hydroboration do to alkynes?
Terminal alkynes become aldehydes and internal alkynes become ketones.
8Alkenes. Hydroboration reactants
1. BH3 2. H2O2, NaOH, H2O
9Alkenes. Halogenation reactants
Br2 or Cl2
10Alkenes. Hydrogenation reactants
H2 and Pd/C
11What process occurs in hydroboration of internal alkynes?
Tautoumerization
12Describe the process of tautoumerization...
The OH groups has its H migrate and becomes a ketone. From enol to keto form.
13Does Hydroboration follow marchovikov's rule?
Hydroboration occurs in an anti-marchovikov manner
14 How do you turn an Alkyne into an Alkene
Using either Lindlers catalyst or NaNH3(l) -78 celsius.
15How do you turn an alkyne into an alkane?
An excess of H2 and Pd/C
16How do you make a geminal dihalide?
Using an excess of HX
17What process changes for terminal and internal alkynes when creating alkenes?
Internal alkynes can be trans or cis.
18How do you create a cis internal alkene?
Lindlers catalyst
19Alkynes. Addition of water reactants
H2O and H2SO4
20Alkynes. Reactants of Hydroboration
1. BH3 2. NaOH, H2O2
21Alkynes. Reactants of ozonolysis
1. O3 -78 celsius 2. H2O
22Alkynes. Reactants of X-X addition 1eq
1 mol of Br2 or Cl2
23Alkenes. Halohydrin of Alkenes
Br2 and H2O
24Alkenes. Epoxidation of Alkenes.
Perracid
25Alkenes. Ozonolysis reactants
1. O3 -78 celsius 2.(CH3)2 S
26Alkynes. Reactants of HX addition XS
2 mol of HBr or HCl
27How do you create a trans internal alkene?
NaNH3(l) -78 celsius
28What does the hydration of an alkyne do?
Creates a ketone due to tautoumerization.
29Alkynes. Reactants of X-X addition XS
2 mol of Br2 or Cl2
30What does NaNH2 do to an Alkyne?
It deprotonates the alkyne or takes away a proton.
31Alkenes. Ozonolysis reactants (to get acids)
1. O3 -78 celsius 2. H2O2
32Alkynes. Reactants of HX addition 1 eq
HCl or Hbr