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Dibenzalacetone density

19/12/2020 Client: saad24vbs Deadline: 7 Days

Synthesis of E,E-dibenzalacetone (E,E-DBA)


Afra ALMashari


5/18/2017


Abstract


The preparation of E,E-dibenzalacetone (Scheme 1), from benzaldehyde and acetone in the presence of ethanol and Ethanolic sodium hydroxide, is described. E,E-dibenzalacetone was purified by recrystallization, E,E-dibenzalacetone was recrystallized from. E,E-dibenzalacetone was obtained in 67.1% yield. The crude and purified products were characterized by melting point determination.


Introduction


The purpose of this experiment was to employ a based-catalyzed aldol condensation in the synthesize of E,E-dibenzalacetone and to characterize the crude and purified samples of E,E-dibenzalacetone by melting point determination. As shown in Scheme 1 this involved allowing benzaldehyde to react with acetone in the presence of ethanol and Ethanolic sodium hydroxide.


../Desktop/lab%20report/Unit%205%20reaction%20scheme.gif Scheme 1


Results


The results of the synthesis of E,E-dibenzalacetone are summarized in Table 1.


Compound


molar


mass (g/mol)


volume/mass moles


yield


Melting point (C)


benzaldehyde (density 1.043 g/mL)


106.2 g/mole


0.25 ml


0.26 g


0.002 mole


N/A


N/A


acetone (density 0.788 g/mL)


580.08 g/mole


0.1 ml


0.07 g


0.001 mole


N/A


N/A


E,E-DBA



(a yellow solid)


234.24 g/mole


N/A


Theoretical


0.234 g


0.001 mole


Literature value


110-111oC


E,E-DBA



(a yellow solid)


234.24 g/mole


N/A


Actual


crude*


0.645 g


63.7%


purified**


0.14 g


67.1


Actual


Crude


109-110 Oc


purified


110-111 Oc


* a yellow solid ** a yellow crystals solid


Discussion




Experimental Procedure



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