Reagents 1. HCl
2. HBr
3. H2O, H2SO4
4. Br2
5. Cl2
6. H2, Pd
7. Br2, H2O
8. Cl2, H2O
9. OSO4 then NaHSO3
10. Hg(OAC)2, H2O then NaBH4
11. BH3 then H2O2, NaOH
12. O3 then (CH3)2S
13. 2 equivalents of NaNH2
14. H2, Lindlar's catalyst
15. Na / NH3
16. H2SO4, HgSO4
17. (sia)2BH then H2O2, NaOH
18. 1 equivalent of NaNH2
The above synthesis scheme was designed using the Organic Chemistry Roadmaps. In this scheme, identify the reagents necessary to accomplish the following steps in the production of (3R,4S)-3,4-dibromohexane from acetylene:
Step 4:
Step 1:
Step 3:

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent