June 2011
Convergent preparation of 2-phenylethanol
The convergent synthesis of 2-phenylethanol was executed with bromination of benzene in the presence of pyridine to give bromobenzene which was reacted with magnesium metal to give phenylmagnesium bromide. Ethene was generated from ethanol and converted to 1,2-dibromoethane which in turn was reacted with the Grignard in an inverse manner to give 2-phenylbromoethane. Reaction of 2-phenylbromoethane and aqueous sodium...
June 2011
Fatty acid profiles of the eggs and juvenile muscle of Nile perch (Lates niloticus, L. 1758) caught from Lake Victoria, Uganda
Fatty acid profiling of the eggs and muscle of Lates niloticus juveniles was carried out, revealing the presence of two types of cholesterol and over twenty fatty acids. The total saturated fatty acid, total monounsaturated acid and the total polyunsaturated fatty acid compositions in the various samples lay in the ranges 13.39 to 41.81, 19.41 to 42.98 and 22.17 to 43.63%, respectively. There was a detection of an...
June 2011
NMR and fluororescence enhancement effect studies of ternary inclusion complexes among naphthalenediamines-triethylene tetramine modified ï¢-cyclodextrin-lanthanide metal ions
The 6-OH group of b-cyclodextrin (b-CD) was modified by triethylene tetramine. The modified host molecule successfully complexes 1,5-naphthalenediamine and 1,8-naphthalenediamine, respectively, in the presence of lanthanide metal ions (Y3+, Yb3+, Nd3+, Sm3+). As a result, eight ternary inclusion complexes (host-guest-metal) were formed, which were characterized via 1H nuclear magnetic resonance (NMR) technique. The...
June 2011
Synthesis and characterization of three new benzylidene acetohydrazide copper (ІІ) complexes
The synthesis and characterization of three complexes with copper (II) are described. The reaction between Cu(NO3)2.3H2O with bis[(E)-N'-(3-nitrobenzylidene) acetohydrazide], (NBAH) and bis[(E)-N'(4-methylbenzylidene) acetohydrazide], (MBAH) and bis[(E)-N'-(2,4-dichlorobenzylidene)acetohydrazide], (DBAH) produced three new ionic complexes. One of them is bis[(E)-N'-(3-nitrobenzylidene)...
June 2011
A study on the solid phase extraction of CO(II)-IIDE chelate with C18 disk and its application to the determination of trace cobalt
A sensitive, selective and rapid method has been developed for the determination of µg l-1 level of cobalt based on the rapid reaction of cobalt(II) with isopropyl 2-[(isopropoxy carbothioyl) disulfanyl] ethanethioate chelate (IIDE) and the solid phase extraction (SPE) of the colored chelate with Waters Porapak Sep-Park C18 disk. The isopropyl 2-[(isopropoxy carbothioyl) disulfanyl]ethanethioate chelate can...
June 2011
Analysis of gas-chromatographic method for the determination of ethanol in an 18-F-fluorodeoxyglucose (FDG-18) solution
A gas chromatographic method for determination of ethanol in an fluorodeoxyglucose (FDG)-18 solution was developed. The pre-validation tests were made to test some parameters. Three samples in the concentration of 400, 4000 and 7200 ppm, respectively were analyzed using the novel methodology. The results of the technique were not good. Although the method seems to be capable to identify ethanol in solution, the...
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