# 1.What are the dominant energy terms that are responsible for cesium fluoride occurring as an ionic solid and hydrogen fluoride occurring as    a diatomic gas at standard conditions? 2.Explain why the energy separation between the t2g and eg  d molecular orbitals in  Mo(OCH3)6   is smaller than the value for Mo(CO)6   even though  the average Mo-OCH3 bond dissociation enthalpy is more than  twice the    M-CO

Question

1.What are the dominant energy terms that are responsible for cesium fluoride occurring as an ionic solid and hydrogen fluoride occurring as    a diatomic gas at standard conditions?

2.Explain why the energy separation between the t2g and ed molecular orbitals in  Mo(OCH3)6   is smaller than the value for Mo(CO)6   even though  the average Mo-OCH3 bond dissociation enthalpy is more than  twice the    M-CO