Preparation and characterization of anacardic acid coordination compounds with Cu (11), Ni(11) and Zn(11)

Date

4-2009

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Hidelisa P. Hernandez

Abstract

SAPUNGAN, MARK ERICKSON M. College of Arts and Sciences. University of the Philippines Los Banos, April 2009. Preparation and Characterization of Anacardic Acid Coordination Compounds with Cu(II), Ni(II) and Zn(II).

Adviser: Hidelisa P. Hernandez, Ph. D.

Mechanical expulsion of cashew nut shells obtained viscous and brown natural cashew nut shell liquid (CNSL) with a percentage yield of 23% based on the initial weight of the shells. The TLC profile of the extract on silica gel G using the solvent system dichloromethane:formic acid (20:0.01 v/v) showed three spots which correspond to cardol, anacardic acid and cardanol with Rf values of 0.12, 0.33 and 0.72, respectively. Anacardic acid was isolated from natural CNSL by precipitating as calcium salt, followed by acidification and extraction. The percentage yield of crude anacardic acid was 74.69% based on the initial weight of natutal CNSL. The TLC profile of the isolate on silica gel G using the solvent dichloromethane:formic acid (20:0.01 v/v) showed one yellow elongated spot with an Rf value of 0.30. The crude isolate was purified through radial chromatography using Chromatotron®. The percent recovery of the pure anacardic acid was 24% based on the initial weight of crude anacardic acid. Coordination compounds of anacardic acid were prepared by mixing equimolar amounts of anacardic acid with the divalent transition metals Cu', Nit' and Zna+ producing highly colored organometallic compounds. Anacardic acid and its coordination compounds with metals Cu(II), Ni(II) and Zn(II) were characterized by Ultraviolet-Visible (UV-Vis), Infrared (IR) and 'H-NMR spectroscopy and Hyperchem® software. UV-Vis spectroscopic analysis of the compounds showed that anacardic acid coordinates with the metal ions in a 1:1 ratio. IR and spectral studies showed that the phenolic and carboxylic functionalities of anacardic acid coordinate with the metal ions forming highly colored complexes. Computational analysis using Hyperchem® software showed that divalent transition metals Cu(II), Ni(II) and Zn(II) form both 1:1 and 2:1 anacardic acid-metal coordination compounds.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

This document is currently not available here.

Share

COinS