Chapter 9 - University of Dayton Academic Webserver

326
Chapter 9: Molecular Structures
(d) XCl 4 would have no lone pairs on the central atom, if X = C.
. . .
. .
. . .
.
F
F C F
.
. F .
96. Five water molecules could hydrogen bond to an acetic acid molecule: one to each of the four lone pairs on
O atoms in acetic acid and one to the H atom bonded to an O atom in acetic acid.
. .. O
H
H
. .
H O
.
..
.
H C C O H
H
..
.. .
..
.
..
.. . .. O
H
H
H
97. Three water molecules could hydrogen bond to an ethylamine molecule. One to the lone pair on the N atom
in ethylamine and one to each of the H atoms bonded to the N atom in ethylamine.
H
..
H
H C N H
H H
H
98. (a) This is incorrect, because the H atoms are not bonded to highly electronegative atoms.
.. .
O
H
..
.
O
H
(b) This is correct. The H atom is bonded to an O atom (EN = 3.5) and is hydrogen bonding to another O
atom.
(c) This is incorrect. The H atom is bonded F. This is a covalent bond, not an example of the
noncovalent interactive force called a hydrogen bond.
O
H
H
H
.. .
O
. ..
O
O
H
H
H
H