Predict the dipole moment off (i) a molecule of the type AB_(4) having square planar geometry, (ii) a molecule of the type, AB_(3) having trigonal bipyramidal geometry, (iii) a molecule of the type, AB_(6) having octahedral geometry, (iv) a molecule of the type, AB_(7) having pentagonal bipyramidal geometry.

Predict the dipole moment off (i) a molecule of the type AB_(4) having

1.	Predict the dipole moment off (i) a molecule of the type AB_(4) having square planar geometry, (ii) a molecule of the type, AB_(3) having trigonal bipyramidal geometry, (iii) a molecule of the type, AB_(6) having octahedral geometry, (iv) a molecule of the type, AB_(7) having pentagonal bipyramidal geometry.
Answer» Solution :(i) All the four A-B bond MOMENTS act at an angle of `90^(@)` with each other. THEREFORE the net dipole moment of `AB_(4)` is zero `(mu=0)` (ii) DUE to symmetrical structure of the molecule, the equatorial bond moments cancel each other. SIMILARLY the axisl bond moments cancel each other. therefore the resultant dipole moment is zero `(mu=0)` (III) same as (ii), (iv) same as (ii).