Using Sharpless epoxidation, the allylic alcohol that can be used to prepare the given enantiomer has to be shown. Concept Introduction: Sharpless asymmetric epoxidation: Titanium-catalyzed asymmetric epoxidation of primary allylic alcohols is proposed by the Barry Sharpless known as Sharpless epoxidation. The reagent consists of tert-butyl hydroperoxide, titanium tetraisoproxide [ Ti ( O-iPr ) 4 ] and the diethyl tartrate. Sharpless epoxidation is stereospecific based on the diethyl tartrate ( DET ) added. If the − ( DET ) enantiomer is used, that catalyzes the reaction and delivers the epoxide Oxygen from the top face of the alkene ; the + ( DET ) enantiomer is used, that delivers the epoxide where the oxygen is attached from the bottom of the alkene.

Question

Lab Data The distance entered is out of the expected range. Check your calculations and conversion factors. Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3? Did you report your data to the correct number of significant figures? - X Experimental Set-up HCI-NH3 NH3-HCI Longer Tube Time elapsed (min) 5 (exact) 5 (exact) Distance between cotton balls (cm) 24.30 24.40 Distance to cloud (cm) 9.70 14.16 Distance traveled by HCI (cm) 9.70 9.80 Distance traveled by NH3 (cm) 14.60 14.50 Diffusion rate of HCI (cm/hr) 116 118 Diffusion rate of NH3 (cm/hr) 175.2 175.2 How to measure distance and calculate rate

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Question

Chapter 11, Problem 11.28P

Interpretation Introduction

Interpretation:

Using Sharpless epoxidation, the allylic alcohol that can be used to prepare the given enantiomer has to be shown.

Concept Introduction:

Sharpless asymmetric epoxidation: Titanium-catalyzed asymmetric epoxidation of primary allylic alcohols is proposed by the Barry Sharpless known as Sharpless epoxidation. The reagent consists of tert-butyl hydroperoxide, titanium tetraisoproxide [Ti(O-iPr)4] and the diethyl tartrate.

Sharpless epoxidation is stereospecific based on the diethyl tartrate (DET) added. If the −(DET) enantiomer is used, that catalyzes the reaction and delivers the epoxide Oxygen from the top face of the alkene; the +(DET) enantiomer is used, that delivers the epoxide where the oxygen is attached from the bottom of the alkene.

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Lab Data The distance entered is out of the expected range. Check your calculations and conversion factors. Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3? Did you report your data to the correct number of significant figures? - X Experimental Set-up HCI-NH3 NH3-HCI Longer Tube Time elapsed (min) 5 (exact) 5 (exact) Distance between cotton balls (cm) 24.30 24.40 Distance to cloud (cm) 9.70 14.16 Distance traveled by HCI (cm) 9.70 9.80 Distance traveled by NH3 (cm) 14.60 14.50 Diffusion rate of HCI (cm/hr) 116 118 Diffusion rate of NH3 (cm/hr) 175.2 175.2 How to measure distance and calculate rate

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