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Đề tài tiểu luận: WATER is a green SOLVENT in organic synthesis môn Hóa Học Xanh của sinh viên Đại Học Bách Khoa, tài liệu nhầm hướng đến việc tham khảo dành cho các bạn sinh viên đang theo học môn này, có sai sót gì mong các bạn thông cảm
HOCHI CHIMINH MINHUNIVERSITY UNIVERSITYOF OFTECHNOLOGY TECHNOLOGY HO PRESENTATION WATER is a green SOLVENT in organic synthesis Dr Nam Thanh Son Phan Group 01 Nguyễn Hoàng Đại Lợi 61305029 Trần Bảo Thanh vân 03 61304781 Võ Quốc Anh 02 61300158 OUTLINE The usual usual properties properties of of The liquid water water liquid Introduction Introduction I Water Water is is a a green green solvent solvent in in T organic organic synthesis synthesis Why Why is is water water green? green? W W OUTLINE The usual usual properties properties of of The liquid water water liquid Introduction Introduction I Water Water is is a a green green solvent solvent in in T organic organic synthesis synthesis Why Why is is water water green? green? W W INTRODUCTION Over 70% the Earth’s surface 70% human bodies INTRODUCTION Water is limited resource INTRODUCTION In Chemistry: Water is a solvent because of its high polarity. It is able to dissolve or dissociate many particle A 104.5° bond angle creates a very strong dipole Water has hydrogen bonding The salt is the solute, the water is the solvent OUTLINE The usual usual properties properties of of The liquid water water liquid Introduction Introduction I Water Water is is a a green green solvent solvent in in T organic organic synthesis synthesis Why Why is is water water green? green? W W The usual properties of water • Boiling Point and Freezing Point • Heat of Vaporization: 2.27 MJ/Kg The usual properties of water Surface Tension 80 70 60 50 40 30 20 10 acetone benzen ethyl acetate Surface tension of water and other liquids water Water is a green solvent in origin synthesis Reduction of nitroarene in water is a green solvent: A green synthetic method for fast and convenient with reducing agent is NaBH4 and effective catalyst is Nikel salt (NiCl2.6H20) Water is a green solvent in origin synthesis Anilin: a toxic organic compoud, is used to produce precursor to polyurethane and other industrial chemicals Rubber processing chemicals Herbicides Dyes and pigments Water is a green solvent in origin synthesis Nitroarene: liquid, colourless, almod and very toxic Sodium borohydride(NaBH2): Nickel salts( NiCl2.6H20): is chosen as inorganic compound, white the effective catalyst, the anhydrous is powder, is used widely reducing yellown and the nickel salts in aqua is agent in organic chemistry green Water is a green solvent in origin synthesis TLC: thin layer chromtograph To purify determination of substrates, product and reaction Stationary phase: silicagel 60 F254 aluminium sheet Moble phase: solvent (CCl4/Et20:5/2) Experiment Nitrobenzene Solution (nitrobenzene:0.1231 g and water:2ml) Nickel salts (0,1188g) NaBH4(0,1134g) Stirr Monitored Extracted Dry Evaporation Anilin For 20 minutes and 60 By TLC With CH2CL2 Result OUTLINE The usual usual properties properties of of The liquid water water liquid Introduction Introduction I Water Water is is a a green green solvent solvent in in T organic organic synthesis synthesis Why Why is is water water green? green? W 27 W Why is water green? • • • • This method is simple, inexpensive, easily scaled-up Water is not cheap, no toxic and popular Use water in reasonable dose, reactor carry out very fast It is safe Diels – Alder reaction • Diels - Alder reaction (Diene synthesis) Reactor between a conjugated diene and dienophile ( component) to form a cyclic structures Charateristics • • • • Hydrophobic Non-polar Slow reaction Diels-Alder very necessary in life faster reaction rates Answer • Better selectivity In 1980, Dr Ronald Breslow - Columbia University in New York - US. Breslow’s seminal paper on hydrophobic acceleration of Diels – Alder reactions appeared • Faster reaction rates • Higher yields • Water’s environmentally benign - - - - - - - - - conclusions of Dr Ronald Breslow The Synthetic chemists are under increasing pressure to exchange traditional organic solvents for water Water offers a host of advantages as a solvent – being cheap, abundant, non-flammable and non-toxic Reactions run in water can give better results, including faster reaction rates and higher product yields Academic chemists have shown that a wide range of reactions can be run in water, and industry is increasingly adopting water as a solvent GROUP THANK YOU VERY MUCH HAPPY TEACHER DAY 20/11/2015