csir net chemistry

CSIR-UGC NET-JRF CHEMICAL SCIENCES (Chemistry) Syllabus 2022

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Inorganic Chemistry Chemical periodicity Structure andbonding in homo- and heteronuclear molecules, including shapes of molecules (VSEPR Theory). Concepts of acids and bases  Hard-Soft acid-base concept, non-aqueous solvents. 3. Main group elements and their compounds Allotropy, synthesis, structure and bonding, industrial importance of the compounds. 4. Transition elements and coordination compounds structure, bonding theories, spectral and … Read more

Appel Reaction:

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Appel Reaction

The Appel reaction is a common organic nucleophilic substitution reaction (SN2) employed to transform alcohol to a corresponding alkyl halide using the reagents tetrahalomethane (CX4) and triphenylphosphine (PPh4) with inversion of stereochemistry and high yield.

TAKAI-UTIMOTO OLEFINATION (TAKAI REACTION)

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Takai olefination

Takai reaction is a general carbon-carbon bond-forming reaction in organic chemistry. Takai reaction is also known as takai -Utimoto olefination, This transformation is referred to as the name of Kazuhiko Takai. This olefination is a simple alternative for the Wittig reaction and other complex methods like preparing an E alkene stereoselective (major) isomer. In this method, chromium(II) catalyst was used to prepare (E) configuration of alkenyl halides from corresponding carbonyl compounds like aldehyde and ketones.