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

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

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  • Perera, K. Sarath. D. (Institue of Chemistry Ceylon, 2023-06)
    Coordinatively unsaturated metal centers may interact with a C-H bond of a coordinated ligand and then undergo C-H bond activation or fission to form metallacycles
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2023-01)
    An alkyl-metal complex has at least one Metal Carbon (M-C) σ- or π-bond. Grignard reagent (RMgX) and LiR are the most common alkyl-metal reagents used in organic synthesis.
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2021-09)
    Arenes are aromatic compounds which can act These complexes with three simple ligands are called as π-electron donors. Organometallic complexes with such ligands are commonly known as arene complexes, arene metal complexes ...
  • Perera, K. Sarath. D. (Institute of Chemistry, 2021-06)
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2023-01)
    Free radicals can be defined as chemical species (atom, molecule or ion) which have a single unpaired valence electron.
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2020-05)
    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.
  • Perera, K. Sarath. D. (Institute of chemistry Ceylon, 2023-06)
    Diels-Alder (D-A) reaction is a (4π+2π) cycloaddition reaction. It is used to generate six-membered rings by combining two π-systems. The key components of this reaction are a conjugated diene (an alkene with two π-bonds) ...
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2021-04)
    Hydrogenation of olefins is one of the simplest reactions, where two hydrogen atoms add across a carbon-carbon double bond to give an alkane.
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2020-09)
    n an insertion reaction, Y gets transferred on to a ligand (AB).
  • Perera, K. Sarath. D. (Institute of chemistry Ceylon, 2022-10)
    Coordination chemistry of transition metals is very important as it helps students to understand various industrial, chemical and biological processes. Hemoglobin and chlorophyll are the two most important compounds ...
  • Perera, K. Sarath. D. (Institute of chemistry Ceylon, 2022-10)
    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. A large number of industries ...
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2021-04)
    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); ...
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2020-01)
    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 ...
  • Perera, K. Sarath. D. (Institute of Chemistry, 2021-06)
    Mass spectrometry is an analytical technique used to obtain information on the structure and molecular weight/accurate mass of a given compound. The main components of the mass spectrometer are the ion source, mass ...
  • Perera, K. Sarath. D. (Institute of Chemistry, 2020-09)
    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.
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2021-04)
    We know that main group hydrides such as LiAlH4 and NaBH4 are the common reducing agents used by organic chemists to reduce aldehydes, ketones and carboxylic acids. Transition metal hydrides act as ...
  • Perera, K. Sarath. D. (Institute of chemistry Ceylon, 2022-10)
    Metathesis of simple salts is a double replacement reaction as shown below. AX + BY → AY + BX In Greek, “Metathesis” is known as the change of position or transposition. Olefin metathesis (OM) is the catalytic scission ...
  • Perera, K. Sarath. D. (Institute of Chemistry, 2021-06)
    In 1960, chemists at BASF developed the carbonylation of methanol into acetic acid. CH3 OH + CO CH3 COOH Monsanto process Monsanto Company introduced a new catalytic system in 1966. It is now known as the Monsanto ...
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2021-09)
    Organic chemistry is basically the study of synthesis, reactions, properties, and structures of carbon-containing compounds. Organic reactions can be classified into four main types: addition, elimination (E), substitution, ...
  • Perera, K. Sarath. D. (Institute of Chemistry Ceylon, 2020-05)
    Coordinatively unsaturated metal centres (Mn+) (valence electron count, VEC<18) may undergo oxidative addition reactions to form saturated metal complexes by cleaving the X-Y bond of a molecule (e.g. H2 , O2 , ...

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