Write the symmetry elements and the point groups of the following:
(i) Water (ii) Ammonia (iii) Benzene
)The water molecule possesses three symmetry operations in addition to the identify. These are illustrated below. The principal symmetry axis is the rotational axis, which we designate as the z direction. The rotation axis is along the intersection of the two mirror planes. There is no symmetry specification for which mirror plane is in the xz and yz planes. This may lead to ambiguity in the assignment of irreducible represnetations where the symmetry planes are poorly
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Which functional groups are expected to absorb in the 2000 – 1500 cm-1 region of IR spectrum? Explain.
Give the selection rules and the schematic diagram of the vibration-rotation, Raman spectrum of a diatomic gas.
Why cannot a glass cell be used for IR spectroscopy?
Draw and explain the normal modes of vibration of water molecule.
What are the sources of radiation in Raman spectrometer?
Derive the expression
Which factors affect the chemical shift? Explain.