state and explain Woodward -Hofmann rules
Answers
WOODWARD- FIESER RULES Each type of diene or triene system is having a certain fixed value at which absorption takes place; this constitutes the Base value or Parent value The contribution made by various alkyl substituents or ring residue, double bond extending conjugation and polar groups such as –Cl, -Br etc are ...
Answer:
woodward fieser rule
1. Presented by : B.Kavita M.Pharmacy 1st yr Department of pharmaceutical analysis
2. Introduction . WOODWARD- FIESER RULES . Woodward - Fieser rules for Conjugated Dienes . Woodward - Fieser rules for α,β - unsaturated Carbonyl compounds. Woodward - Fieser rules for Aromatic compounds or Benzoyl derivatives.
3. INTRODUCTION In 1945 Robert Burns Woodward gave certain rules for correlating λ structure. In 1959 Louis Frederick Fieser modified these rules with more experimental data, and the modified rule is known as Woodward and λmax for a given structure by relating the position and degree of substitution of chromophore.
State and explain Kirchhoff's rules
The law states that the amount of current flowing into a node is equal to the sum of currents flowing out of it. For performing the nodal analysis in Ohm's law, KCL is used. Kirchhoff's Voltage Law (KVL): KVL is also known as Kirchhoff's second law or loop law. The principle of this law is to conserve energy