Grignard Synthesis of Triphenylmethanol Lab Report Essay Example

Grignard Synthesis of Triphenylmethanol Lab Report Essay Example Grignard Synthesis of Triphenylmethanol Lab Report Paper Grignard Synthesis of Triphenylmethanol Lab Report Paper A Grinded reagent is a type of ergonomically, which consists of a bond twine a metal and a carbon. There are three types of carbon-metal bonds: ionic, polar covalent, and covalent. The ionic bonded compounds (example: RNa) have a weak bond between the carbon and the metal, and are therefore not useful because they are so volatile, and they will react with nearly anything. The covalent bonded compounds (example: Rap) are toxic. The compounds that are polar covalent bonded are Grinded reagents and are useful in making carbon- carbon bonds and reducing carbonyl. Grinded reagents are any of the numerous organic derivatives of magnesium (MGM), commonly represented by the mineral formula Ramp (in which R is a hydrocarbon radical: CHI, CHI, CHI, etc. ; and X is a halogen atom, usually chlorine, bromine, or iodine). They are called Grinded reagents after their discoverer, French chemist Victor Grinded, who was a corrections of the 1912 Nobel Prize for Chemistry for this work (1). Grinded reagents commonly are prepared by reaction of an alkyl halide (RUG) with magnesium in a nitrogen atmosphere because the reagent is very reactive toward oxygen and moisture, which would cause the reagent to react with the water instead of any carbon atoms (2). Grinded reagents react with water to produce alkaline. This is the reason that everything has to be very dry during the preparation. Alkyl halides vary greatly in their rates of reaction with magnesium. For example, alkyl iodides generally react very rapidly, whereas most aryl chlorides react very slowly, if at all. : Their chemical behavior resembles that of carbonation species that contain a negatively charged carbon (:CHI). Grinded reagents are strong bases and strong nucleotides. Thus, the Grinded reagent methamphetamine bromide (Chamber) behaves as if it were equivalent to the method ion (:CHI-). Grinded agents are made through single electron transfers with magnesium and an alkyl halide. Grinded reagents are manufactured through the process of a radical reaction as shown below. Grinded reagents react with molecules to extend carbon-carbon chains through the attraction of a necrophilia carbon to an electroscopic carbon (necrophilia addition). The Grinded reagent can serve as a nucleoli because of the attraction between the slight negatives of the carbon atom in the Grinded reagent and the oppositeness of the carbon in the carbonyl compound. The Grinded reagent can oxidize a carbonyl functional group into a hydroxyl group. The metal is less electronegative than the carbon, so the carbon bears a partial negative charge. This partial negative charge attacks the carbonyl at the partially positive carbon, forms a new carbon-carbon bond, and pushes an electron pair out of the double bond into the lone pair position. The metal then attaches itself at the now negatively charged oxygen. This compound is then treated with an aqueous acid to propionate the oxygen and forms the hydroxyl group. Except for hydrocarbons, ethers, and tertiary amines, almost all organic compounds react with Grinded reagents. Many of these reactions are used for hemolytic purposes, notably those with carbonyl compounds (e. G. Leaderless, stones, esters, and call chlorides), with epoxies, and with halogen compounds of certain metals (e. G. , zinc, cadmium, lead, mercury) to form the alkyl derivatives of those metals. Grinded reagents react with water to form a strong base, and they can act as a nucleoli to find a primary alcohol as shown respectively below. Grinded reagents also react with the least hindered carbon on an epoxies to break the ring in order to relieve ring strain. A reaction of the Grinded reagent and carbon dioxide results in an acid, and action of a nitrite and a Grinded reagent produce a carbonyl via an amine intermediate. These are show below, respectively. Grinded reagents are reactive enough to also attach esters; however, two equivalents of the Grinded reagent are usually added because less then two equivalents leave a large quantity of enervative ester. This reaction forms a tertiary alcohol. Grinded reagents cannot be synthesized from alcohols because instead of reacting with the halide to form the Grinded reagent, the alcohol is deprecated. Grinded reagents also cannot be synthesized from molecules with a carbonyl group. Solvent choice is important in Grinded reagent formation. The solvent must be non-reactive with a negatively charged carbon (ex. Acetone or anything even slightly acidic), and the solvent cannot have a carbonyl group. The solvent must be a volatile solvent that provides a blanket of solvent over the reaction solution so that oxygen and moisture in the air are excluded from the reaction. Oxygen and moisture in the air are very slightly acidic and would disrupt the synthesis of a Grinded reagent. Anhydrous ether (ROR) is often used as a solvent in creating Grinded reagents because it keeps out water and oxygen, makes the complex soluble, and is non-reactive. Water and oxygen cause undesired side reactions. The oxygen in ether has a lone pair of electrons, which is attracted to the partially positive metal. The solvent helps the polar Grinded reagent dissolve by coordination. A dry reflux apparatus is used to heat a solution without gaining any water from the atmosphere. Reflux is the cycle of a liquid going through vaporization and condensation. In order to speed up reactions or to increase the solubility of a compound, chemists often times reflux reaction mixtures. This step implies hat the reaction mixture is brought to a boil. The lowest boiling compound in the mixture determines the temperature when this occurs, usually the solvent. It condenses and returns into the reaction vessel (3). There are some other benefits to using a reflux apparatus. First, molecules dissolve faster in heated liquids because the molecules are moving faster and thus collide faster and more often. Second, the heat needed to cause the solution to reflux is energy that can assist molecules in acquiring enough energy to overcome the activation energy barrier to go from liquid to vapor. The liquid in the flask boils, vaporizes, ND then hits the cool condenser and condenses back into the flask. The water running through the condenser keeps it cool and allows the vapors rising out of the reaction vessel to condense and drip back down into the solution. The Cacao in the drying tube keeps any water from the atmosphere from entering the system. The set up of a dry reflux apparatus is a round bottom flask clamped above a heating mantle with a condenser attached to the round bottom flask. A thermometer adapter is used to attach the drying tube to the condenser.