Synthetic‚ Structural‚ theoretical and biological study of triorganotin(IV) Schiff base complexes derived from amino acids Abstract A new series of triorganotin(IV) complexes of monofunctional bidentate Schiff base have been synthesized and characterized through elemental analysis‚ conductance measurements‚ molecular weight determinations‚ UV-visible‚ multinuclear (1H‚ 13C‚ 119Sn) NMR spectroscopy‚ FT-IR‚ X-ray powder diffraction and theoretical calculations. On the basis of these techniques‚ it
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Discussion: Extraction and crystallization- The purpose of this lab was to extract and crystallize compounds in a mixture using acids and bases. 1 gram of the unknown was dissolved into 30 mL of ethyl acetate. The mixture was then transferred to a separatory funnel. Using aqueous solutions of different pH we were able to separate organic acids‚ bases and neutral compounds from each other. Using three 10 mL portions of HCl‚ we reacted the HCl with the base in solution. This made it possible to
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is also a factor in good yield. The SnI4 dissolves in hot dichloromethane‚ this is very important when the gravity filtration is done as the impurities should be insoluble in the hot solvent allowing for the filter paper to catch them. After recrystallization‚ the product was washed twice with cold solvent‚ as the product is insoluble it
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crude caffeine‚ which on sublimation yields a relatively pure product. Sublimation is the transition of a substance from the solid phase directly to the gas phase without undergoing intermediate liquifications. This process is preferred over recrystallization because it is better at removing impurities. Experimental For this extraction experiment two bags of tea were used‚ which is approximately 4 grams of tea. Water was heated in a small beaker until it began to boil. It was then removed from
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Sodium borohydride Reduction of Benzil Introduction: The Purpose of this experiment is for the students to learn how to use sodium borohydride to reduce benzil to its secondary alcohol product via reduction reaction. This two-step reaction reduces aldehydes by hydrides to primary alcohols‚ and ketones to secondary alcohols. In order for the reaction to occur and to better control the stereochemistry and yield of the product‚ the metal hydride nucleophile of the reducing agents such as LiH‚ LiAlH4
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Classification Tests for Carboxylic Acid and Derivatives Mary Catherine Sarte‚ John Emmanuel Sy‚ Allurie Umel‚Franklin Yap‚ Mary Christine YouIntroduction Carboxylic acids derivatives are simply groupsof compounds that contain a carbonyl group butwith an electronegative atom attached to thecarbon. The difference in the structure leads to amajor change in reactivity. The reactions of thesegroups of compounds involve nucleophilicsubstitution. Although there are abundant kindsof carboxylic acid derivatives
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Title: Nitration of Methyl Benzoate Objective: To prepare methyl-3-nitrobenzene from nitration of methyl benzoate. Results and calculations: Density = 1.094 g/ml = Mass of methyl benzoate = 1.094 g/ml x 2.8 ml = 3.0632 g no. of mol of methyl benzoate = = 0.022499 mol 1 mol of methyl benzoate produced 1 mol of methyl m-nitrobenzene. Therefore‚ 0.022499 mol of methyl benzoate produced 0.022499 mol of methl
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MIXTURES‚ SOLUTIONS‚ SUSPENSIONS AND COLLOIDS MIXTURES A mixture is a combination made up of two or more different substances which are mixed but are not chemically bonded. There are also types of mixtures such as homogeneous mixtures and heterogeneous mixtures. SOLUTIONS A solution is defined as a homogeneous mixture composed of a solute; a substance dissolved into another substance known as a solvent. They can also be defined as groups of molecules that are mixed up completely in even
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Asymmetric Epoxidation of Dihydronaphthalene with a Synthesized Jacobsen’s Catalyst Justin Lindsey 12/08/96 Chem 250 GG Professor Tim Hoyt TA: Andrea Egans Abstract. 1‚2 diaminocyclohexane was reacted with L-(+)-tartaric acid to yield (R‚R)-1‚2-diaminocyclohexane mono-(+)-tartrate salt. The tartrate salt was then reacted with potassium carbonate and 3‚5-di-tert-butylsalicylaldehyde to yield (R‚R)-N‚N’-Bis(3‚5-di-tert-butylsalicylidene)-1‚2-cyclohexanediamine‚ which was then reacted with Mn(OAc)2*4H2O
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Identifying an Unknown Aldehyde or Ketone Introduction The purpose of this lab is to identify an unknown aldehyde or ketone substance using chemical tests. The chemical tests used in this experiment are solubility‚ Schiff‚ Bisulfite‚ and Iodoform tests. Also‚ a 2‚4-dinitrophenylhydrazone derivative synthesis reaction will be completed from which a melting point will be obtained. The chemical test results and the melting point analysis will be compared to the table of compounds given to find the
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