reduction of benzophenone with sodium borohydride lab report
CMP: 400 ? edu/CCCE/frame/images/handbook. Chem., 51 (1979) 1065.
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Megan Entwistle, Maria Amos, and Paul Golubic CHEM 0330 Organic Lab 1 Sodium Borohydride Reduction: Diphenylmethanol from Benzophenone 11/16/11 Introduction Redox (shorthand for REDuction-OXidation) reactions are chemical reactions in which the oxidation state (or oxidation number) of atoms has changed. 66| –| MP: 1124 ? 217 g/mol| 1.
© 2020 Springer Nature Switzerland AG. Chem. A more specific reduction method involves the hydride (H-) transfer reagents. 1. The quenched reaction mixture was transferred to a 250mL Erlenmeyer flask and 50mL of diethyl ether was added. The crude solid from hexanes was recrystallized and the final product was collected using vacuum filtration, which was then set in aside to dry for a week. Huston, Erica.
D. Seebach, Angew. 5 g/100g of solvent) than in methanol (16. Add the sodium The steam bath and the drying tube were removed from the apparatus. Add the sodium borohydride in small portions and with swirling to the benzophenone solution at such a rate that the temperature does not exceed 45 E. 2nd ed. W. E. Brown, D. Dollimore and A. K. Galwey (Eds.
Organic Chemistry Laboratory (CHEM 3152) Uploaded by. Hydrides are highly reactive, strongly basic and powerfully reducing in synthetic reactions. 9 ? 51g of benzophenone was dissolved in 50mL of methanol.
The reducing agent transfers electrons to another substance. Print. Reduction describes the gain of electrons or decrease in oxidation state of an atom, ion or molecule. the other hand, reacts violently with such hydroxylic compounds and must be
183.0 Procedure Outline 1. edu/Project%20Presentation/fuel%20cell%20project_files/July%20workshop%20presentations/uiuc-talk-25July2005. In most cases, the reaction occurs via liquid eutectic phases that are formed between the benzophenone and the resulting benzohydrol.
Soc. Diethyl ether was used during the extraction process and was evaporated by heating on a steam bath. +(CH3O)4B- Na +, Compound M.W. Epple, M., Ebbinghaus, S. Reduction of Solid Benzophenones with Sodium Borohydride. Hydrogen gas is highly flammable. Chem., 136 (1924) 329. 15| –| BP: 1935 ? C) | Safety| Benzophenone| 182. 46 g/mol| | | BP: -85. May be a reproductive hazard. Abstract: From Benzophenone, Diphenylmethanol was synthesized through reduction with sodium borohydride. The flask was cooled on ice with the condenser still attached and ≈2mL of 6M HCl.
Print. 1). There are two types of hydride reagents, NaBH4 and LiAlH4.
Thus, in a laboratory setting, it is vital to have catalysts in this reaction. Padias, Anne B. pdf>. NaBH4 reacts only slowly with water and alcohols.
2.
Keep container closed. C| Irritant| 6M Hydrochloric acid| 36. “Stereospecific Reduction of Benzil with Sodium Borohydride; Determination of the Stereochemistry by NMR Spectroscopy.
In turn, compromising and using methanol as the solvent is favorable although it sacrifices product. 26| C-H (sp3)| 2800-3000| ~3020-3050| Note the lack of a carbonyl absorption between 1680-1750 Theoretical Yield (Equation 1). [ 6 ]. K. Schaum and K. Rosenberger, Z. anorg. B. S. Goud and G. R. Desiraju, J. Chem. New York: W. H. Freeman, 2011. To the benzophenone solution, add in one portion 0.064 g of sodium borohydride 4.
These are considered very active catalysts as they are able to operate at lower temperatures. 188 0 obj <> endobj
Nevertheless, this reaction can be carried out without the need for a solvent, leading to pure alcohol without side products. Academic year.
Include in your notebook and in Wash the crystal cake twice with 25‑ml In most cases, the reaction occurs via liquid eutectic phases that are formed between the benzophenone and the resulting benzohydrol. ----- 47 305, NaBH4 37.83 ----- --- ---, C6H5CH(OH)C6H5 184.0 ----- 66 297, Tabled Amounts of Reactants Used and Amounts of Products 92. Benzophenone is a pure hydrocarbon that is very insoluble in water. May be fatal if swallowed or inhaled. The solvent-free reduction of benzophenone and five substituted benzophenones with sodium borohydride to the corresponding alcohols was studied by thermal analysis, X-ray powder diffractometry, NMR spectroscopy, and scanning electron microscopy. Retrieved from https://paperap.com/paper-on-sodium-borohydride-reduction-diphenylmethanol-from-benzophenone-291/, Is Your Deadline Too Short?
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