Question

1.7 H,O belongs to the point group. Draw the antisymmetric stretching and symmetrical bending mode for H30. To which irreducible representation in the character table of Czy do these IR modes belong? Provide a suitable diagram and explanation in support of your answer. TOTAL (65)

Answer 1

H₂O) point group - car It has & anis, gov (plane af rymmetry) one pos is along the xa anis and other is yz anis a restation is along the zo anes. one the other order point plane of symmetry cuts reflects duo 0-H bonds. is contain the whole malcule. of point group - 4 1 group or has 4 classes E vour Col Symmetic Bend 16ooom! To find irreducible representation to symmetric bending mode

canis will not affect wibrational vectors in symmetric bending so put 1 against ito column. Motion vectoes obtained from reflection en x2 & yz plane are identical do initial ao again 1 appears. E 1 mulliken a ov 1 1 symbal - A o'v. 1 Antisymmetric stretch. MH for asymmetic steeten, c anis will affect vibrational vectors and put - against its column. plane of symmetry, molecule is placed in xz plane. ou replaces ov' so the motion vectors ostained in out (uz) will affect the vectors and will be different from initial so I appears E ca ov clv Mullikan symbol Bil