Change of Carbonyl Compounds to Alkenes Applying Wittig Reaction
п»їSYNTHESIS OF TRANS-9-(2-PHENYLETHENYL) ANTHRACENE (A WITTIG REACTION) Introduction:
The goal of this research is to convert carbonyl substances to alkenes using Wittig reaction. In cases like this we will be synthesizing Trans-9-(2-phenylethenyl) anthracene from benzyltriphenylphosphonium chloride and 9-anthraldehyde. All of us will also try to obtaining a high percent yield and purity for the synthesis of Trans-9-(2-phenylethenyl) anthracene. The device for this reaction goes as a result:
Benzyltriphenylphosphonium chloride (0. 201g) and 9-anthraldehyde (0. 116g) were weighed and added to a short-neck round-bottomed flask (5ml). Dichloromethane (2ml) was scored using a calculating cylinder and added to the flask, and every solid materials was washed down the bottom level of the flask. The flask was then stirred by using a magnetic stirrer at broadband whilst adding 50% aqueous sodium hydroxide (0. 25ml) drop smart using a pipette. After finish addition of the sodium hydroxide, the mix was left to blend for a additional 30 minutes after which we decreased the stirrer speed into a gentle rotate and water (2ml) was added and then stirred for a couple of more a few minutes. The content was transferred to a separatory channel (30ml), applying water (5ml) and dichloromethane (5ml) to complete the transfer. The mixture was shaken and left to be in, the organic and natural layer was removed to an Erlenmeyer flask and the aqueous layer was extracted once more with dichloromethane (5ml) then combined with the previous organic draw out. The combined organic tiers were dried with anhydrous sodium sulfate, transferred through a Hirsch funnel into a filtration flask (25m) attached to an aspirator. Filter paper utilized to stop the drying agent from passing through the channel, and the Erlenmeyer was rinsed with dichloromethane (1ml) and was poured over the drying agent in Hirsch direct. After all the solvent travelled in the filter flask the aspirator was turned off, as well as the filter paper with...
Recommendations: Dictionary of organic chemical substances, 6th copy, Chapman and Hall, Greater london, Volume 3(& Volume 6), 1996 Helen Lindsay and Sean G. Hickey, Organic chemistry research laboratory 2 manual, department of Chemistry University of New Orleans