Bonding

If bond angle is 90 degrees and has no lone pairs all the ___ ____ ____ ____

If there is at least 2 lone pairs, ___ ____ repulsion is greater than ___ _____ and is greater than __ __

1. Bond pairs repel equally

2. Lone pair-lone pair, lone pair-bond pair, bond pair-bond pair

Describe hydrogen bonding in propan-1-ol:

Attraction between _____ ____ ____ and ____ ____ ____ of __ on _____ _______

1. Oxygen lone pairs, delta positive hydrogen, OH, another molecule

Explain why ethanol (CH3,CH2,OH) and methoxymethane (CH3,OCH3) are polar molecules. Refer to electronegativity and shapes:

1. O is more __________ than C and H (creating polar bonds)

2. Shape around O is ___ (due to 2 bond pair, 2 lone pair)

3. The molecular shape is __________ so _____ do not _____ __

1. Electronegative

2. Vent

3. Asymmetrical, dipoles, cancel, out

Why is ethylamine (CH3,CH,NH2) less polar than ethanol and methoxymethane? Refer to shapes and relative electronegativities:

1. Sharp around N in ethylamine is ____ ____, whereas _____ is ___

2. O is more ________ than N

3. __________ _____ in ___ ___ is ____ than in ___ bonds

1. Triganol pyramid, Oxygen, bent

2. Electronegative

3. Electronegativity, difference, O-H, O-C, greater, N-H