In which of the following compounds do you think that intramolecular hydrogen bonding is an important factor: (a) (b) (c) (d) ortho-phthalic acid? Explain. CH2CH2COOH
MO’s in linear triatomic molecules • The electronegativity of hydrogen is greater than that of beryllium so the hydrogen orbital are lower in energy. • Take linear combinations of terminal atom orbitals and determine how they can overlap with orbitals on the central atom • Construct energy level diagram • Distribute electrons starting with the lowest energy orbital • What is bond order of the individual Be-H bonds • BeH i2 strongly (Lewis) acidic as a result of its electron deficiency (vacant p orbitals) MOs of Water (H O) 2 VSEPR analysis: bent geometry Set of AOs: • – O: one 2s, three 2p • – H: two 1s orbitals H 2 in the x-z plane with z bisecting the H-O-H angle Note: the 2p orbital is non-bonding
