EXP338

=Researcher= Matthew McBride =Objective= To determine solubility of [|phenanthrene-9-carboxaldehyde] in chloroform, water, ethyl acetate and benzene. =Procedure= Add the solute to a vial with the solvent and allow the solution to shake on the 25°C shake flask apparatus. Measure solubility using SAMS HNMR. =Results= Vial C: phenanthrene-9-carboxaldehyde in ethyl acetate [|SAMS Sheet] 5 Hours: 0.303 M 24 Hours: 0.292 M

Vial D: phenanthrene-9-carboxaldehyde in benzene [|SAMS Sheet] 5 Hours: 0.669 M =Discussion= Able to obtain two consective measurements for phenanthrene-9-carboxaldehyde in ethyl acetate. Only able to obtain one measurement for phenanthrene-9-carboxaldehyde in benzene, so cannot be certain the solution was saturated. =Conclusion= Solubility of phenanthrene-9-carboxaldehyde in ethyl acetate is 0.3M and the solubility phenanthrene-9-carboxaldehyde in benzene is likely around 0.67M. =Log=

2012-08-16
11:56 0.5046 g of phenanthrene-9-carboxaldehyde in 1-dram screw cap vial A. 0.0105 g of phenanthrene-9-carboxaldehyde in vial B. 0.1253 g of phenanthrene-9-carboxaldehyde in vial C. 0.1057 g of phenanthrene-9-carboxaldehyde in vial D. 12:03 Added 1 mL of chloroform to vial A. 1 mL of water to vial B. 1 mL of ethyl acetate to vial C. 1 mL of benzene to vial D. 12:32 Sealed the vials with parafilm and attached to the shake flask apparatus and placed in the 25°C water bath. 16:35 Removed the vials from the shake plate. Crystals visible in vials B, C, and D. Added supernatant of vial C to NMR Tube 3 and supernatant from vial D to NMR 4. Both were coaxial NMR tubes. Analyzed by 500MHz HNMR using CDCl3. Added 0.0643 g of phenanthrene-9-carboxaldehyde to vial A. 16:39 Sealed the vials with parafilm and placed on the shake plate.

2012-08-17
10:41 Removed vials from shake flask. Crystals visible in vials C and D. 10:58 Added supernatant from vial C to NMR Tube 3. Supernatant from vial D to NMR Tube 4. 11:30 Analyzed by 500MHz HNMR using CDCl3. Unable to analyze vial D, due to crystals being present in the tube and not being able to lock.