Reduction Of Benzophenone With Sodium Borohydride.

Experiment 3.1: Reduction of Benzophenone with sodium Borohydride. Safety precaution: atomic number 11 BorohydrideToxic & irritant brush spillages away with piss atonic Petroleum Highly FlammableKeep away from flames ethyl AcetateHighly FlammableKeep away from flames. balance to non-halogenated waste solvent. Ethanol FlammableKeep away from flames counterpoise to sink with haemorrhoid of piddle. Benzophenone Harmful & IrritantWash spillages away with water Hydrochloric acidCorrosive & Irritant scour spillages away with water. Introduction In this experiment, we will remonstrate the reducing of the aromatic ketone benzophenone with sodium borohydride to diphenylmethanol. The reducing agent is utilise in excess to ensure complete reduction of carbonyl group, and the answer is carried out in aqueous ethanolic solution. The point of crossroad is easily isolated, purified by crystalisation. By use TLC and IR spectrum, we will see the differen ce between benzophenone (starting material) and diphenylmethanol (final product). Experimental number: Benzophenone (358mg, 2.0mmol) was dissolve in ethanol (5ml) in a 25ml declamatory bottomed flaskful. The steadfast did not completely dissolve, so the flask was swirled with magnetic stirrer bar.

In a sm both test tube, sodium borohydride (87mg, 2.2mmol) was dissolved in cold water (1.5ml). This solution was added drop clear-sighted to the stirred ethanolic solution of benzophenone at room temperature. after all the sodium borohydride being added, the categorization was stirred for a gain ground 10min. Meanwhile, ice water (10ml) was mixed with concentrated hydrochloric acid ( 1ml) in 50ml beaker. To this the mixture of ! sodium borohydride and benzophenone was poured slowly into the beaker. The precipitate was collected using suction filtration and rinse with 2 x 5ml portions of water. The crude product was dried at the filtration pump for 10min and then recrystalised it from petroleum ether. After the collected solids were wry and free...If you want to get a abundant essay, order it on our website: OrderEssay.net

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