Chemistry Notes for B.Sc. and M.Sc.

Hooke's Law is an equation which help s in interpreting the molecular vibrations  by assuming bonds as spring having masses (atoms) at two ends. When a molecule is exposed to infrared light, the  bonds between atoms can absorb specific frequencies of that light, causing the bonds to stretch ,  compress  or bend , just  like a spring.  This characteristic absorption of light corresponding to certain  specific vibrational frequencies helps in identifying the functional groups in that  molecule and thus adding to  the characterization of molecular structures.  The mathematical expression of Hooke’s law is given as follows: ν  = 1/2π√k/µ ῡ = 1/2πc√k/µ where: ·  ν  = the frequency of vibration ·  ῡ = Wave number (reciprocal of wavelength) ·  k  = the force constant ·  c = Velocity of light ·  Π = Constant ·  μ = reduced mass The reduced mass of the two atoms involved in the bond  is  calc...