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Browsing Student Corner by Author "Perera,K. Sarath D"

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    Aromaticity and Reactions of Aromatic Molecules/Ions
    (Institute of Chemistry Ceylon, 2021-06) Perera,K. Sarath D
    Fully conjugated (FC) and unsaturated ring systems are known as aromatic compounds. Aromaticity is a chemical property that determines the stability of cyclic molecules. Basically, there are three structural features that determine the aromaticity of a compound.
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    Crystal Field Theory
    (Institute of Chemistry Ceylon, 2020-05) Perera,K. Sarath D
    Crystal Field Theory (CFT) supersedes valence bond theory as it provides a simple method to explain the electronic spectra and magnetism of transition metal complexes.
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    Hydrogenation of olefins
    (Institute of Chemistry Ceylon, 2021-04) Perera,K. Sarath D
    Hydrogenation of olefins is one of the simplest reactions, where two hydrogen atoms add across a carbon-carbon double bond to give an alkane.
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    Infrared Spectroscopy
    (Institute of Chemistry Ceylon, 2022-06) Perera,K. Sarath D
    The energy of most of the molecular vibrations falls into the infrared region (4000 - 400 cm-1) of the electromagnetic spectrum.
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    Introduction to Coordination Chemistry
    (Institute of Chemistry Ceylon, 2022-09) Perera,K. Sarath D
    Coordination chemistry of transition metals is very important as it helps students to understand various industrial, chemical and biological processes.
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    Introduction to Heterocyclic Chemistry
    (Institute of Chemistry Ceylon, 2022-06) Perera,K. Sarath D
    Heterocycles are cyclic structures with at least one atom other than C and H. Most common heteroatoms are N, O and S. A large portion of natural products are heterocyclic compounds and some are being utilized as pharmaceuticals, agrochemicals etc.
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    Introduction to Polymer Chemistry
    (Institute of Chemistry Ceylon, 2022-09) Perera,K. Sarath D
    Polymers play an important role in our day-to-day life. In Greek, poly means “many” and mer means “parts”. Polysaccharides, proteins and nucleic acids are the main bio-polymers/macromolecules.
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    Introduction to Radiochemistry
    (Institute of Chemistry Ceylon, 2021-04) Perera,K. Sarath D
    An atom consists of a very small (about 10–10 m in radius), dense and positively charged nucleus and negatively charged electrons. The nucleus consists of protons (p) and neutrons (n); these two particles are collectively known as nucleons
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    Isomerism in Coordination Compounds
    (Institute of Chemistry Ceylon, 2020) Perera,K. Sarath D
    Isomers (compounds with the same chemical formula) can be broadly classified into (i) stereoisomers (e.g. geometrical and optical) with the same connectivity but having different spatial arrangements and (ii) structural isomers with different connections between atoms.
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    Mass Spectrometry
    (Institute of Chemistry Ceylon, 2021-06) Perera,K. Sarath D
    Mass spectrometry is an analytical technique used to obtain information on the structure and molecular weight/accurate mass of a given compound.
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    Metal Carbonyls
    (Institute of Chemistry Ceylon, 2020-09) Perera,K. Sarath D
    Carbon monoxide is a good π-acceptor and the M-C bond in metal carbonyls [M(CO)n ] has a significant π character. Thus, the M-C bond is strengthened and the carbon oxygen bond is weakened with the increase in back bonding.
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    Metathesis and Polymerization of Olefins
    (Institute of Chemistry Ceylon, 2022-09) Perera,K. Sarath D
    Metathesis of simple salts is a double replacement reaction as shown below.
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    Monsanto and Cativa processes of acetic acid synthesis
    (Institute of Chemistry Ceylon, 2021-06) Perera,K. Sarath D
    In 1960, chemists at BASF developed the carbonylation of methanol into acetic acid.
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    Substitution Reactions
    (Institute of Chemistry Ceylon, 2020-05) Perera,K. Sarath D
    A good knowledge in coordination and organometallic chemistry is very useful to a student, who wish to understand chemical transformations taking place around in nature and industry
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    UV-visible Spectroscopy
    (Institute of Chemistry Ceylon, 2022-06) Perera,K. Sarath D
    Molecules have different energy states: electronic, vibrational, rotational, and nuclear. Quantized energy is responsible for each transition (e.g., rotational - microwaves, infrared - vibrational) within the molecule.
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    Valence Bond Theory
    (Institute of Chemistry Ceylon, 2020-01) Perera,K. Sarath D
    Metal centres of d-block form coordination compounds with ligands which can donate a pair of electrons.