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The purpose of the study was to find out if teachers of Chemistry were using learner-centered teaching strategies to large classes in order to enhance individual learning in selected Government High schools of Kitwe district on the Copperbelt Province in Zambia. The objectives of the study were...

In this work, four methods have been tried in an effort to find the best method for the determination of magnesium in dolomite, The determination of the magnesium content of dolomite, the raw material for the production of cement, is very important in that the quality of cement depends on its...

Several 5-0-toluene-p-sulphonyl and 5-iodo derivatives of «-and 3-ribofuranoses and «-xylofuranose have been prepared in order to study their reactions with sodium hydrogen carbonate in dimethyl sulphoxide. Similar reactions are known to convert acylic primary sulphonates and iodides to aldehydes...

This dissertation is focused on the spectroscopic characterization of cyclopentadienyl iron dicarbonyl ketone complexes 42. The ketone silver tetraflouroborate complexes 32 are initially prepared. The formation of 32 is supported by the enhanced solubility of the silver tetraflouroborate salt in...

Catechols are important precursors in the production of pharmaceuticals but they are associated with many problems such as their instability and susceptibility to oxidation and polymerisation. In order to avoid these problems, acylcatechols are used. However, disadvantages exist in the industrial...

ML3 coordination complexes where (M = V3+, Cr3+, Mn3+ and L = phenacetylidene -2, 2, 5, 5 - tetramethyl -3- imidazolidine -1- oxyl free radical ligand), have been synthesized. Vanadium(III) complex was prepared by refluxing a mixture of Vanadium Pentoxide and the ligand in ethanol containing...

An account of the reaction of {(h -C,-H,)-M ?(CO) } and {(h -C5H.) M (CO) } (M=Mo,W) with aromatic and non-aromatic thiones to give mostly complexes of general molecular formula {(h -CJ (CO)4U (M=Mo, W; L=Thione) is given. {(h-C^CH^^o^O^) and {(h -CCH. CH_)/^lo/,(CO)/ } react with thiones in a...