Effectiveness of Acid & Base Catalists on the Synthesis of 2-Hidroksikalkon, a Potential Compound of Pigment

Budimarwanti, C and Handayani, Sri (2011) Effectiveness of Acid & Base Catalists on the Synthesis of 2-Hidroksikalkon, a Potential Compound of Pigment. [Experiment/Research] (Unpublished)

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Abstract

This study aims at comparing the effectiveness of acid and base catalysts in the synthesis of 2-hidroksikalkon. The synthesis of 2-hidroksikalkon using the acid catalyst was by enol reaction mechanism. Meanwhile, if the base catalyst is used, it will be through the mechanism of enolate. The basic ingredients used are asetofenon and 2-hidroksibenzaldehida. The research was begun by a cross-aldol condensation between asetofenon and 2- hidroksibenzaldehida to form 2-hidroksikalkon using the acid catalyst of hydrochloric. Next, the condensation of these compounds were purified and characterized using TLC, TLC scanners, FTIR and NMR. The two-phase research was conducted in the same way but the acid catalyst was replaced with the sodium hydroxide catalyst. Then, the synthesis results were compared to determine a more effective catalyst. The results showed that the synthesis with the acid catalyst did not get the 2-hidroksikalkon, whereas with the base catalyst, it successfully obtained the 2-hidroksikalkon shaped orange crystals with the melting point of 148oC, 31.22% yield, and 64% purity. It could be concluded that it was more effective to use the base catalyst in the synthesis of 2-hidroksikalkon with the basic materials of asetofenon and 2-hidroksibenzaldehida than using the acid catalyst.

Item Type:	Experiment/Research
Subjects:	Matematika dan Ilmu Pengetahuan Alam > Kimia
Divisions:	Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Jurusan Pendidikan Kimia > Kimia
Depositing User:	Eprints
Date Deposited:	07 Aug 2012 01:44
Last Modified:	07 Aug 2012 01:44
URI:	http://eprints.uny.ac.id/id/eprint/2819

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