Give the best Lewis
structure for each of the following ions or molecules: In each
case, state:
The electron geometry around the central atom
The VSEPR shape/molecular geometry around the central atom
Whether or not the ion/molecule carries a permanent dipole. If
a permanent dipole exists, use a crossed arrow to show its
direction.
A.) Iodine pentafluoride, IF5
B.) Selenium trifluoride ion, SeF3+
Draw the Lewis structures for each of the following ions or
molecules. For each, give (i) the molecular shape, (ii) the
electron pair geometry at the central atom, and (iii) the
hybridization of the central atom.
(a) H2Se
(b) H2CO (C is the central atom)
(c) BrF4 -
(d) PF5
(e) SiF4
Answer the following involving the Lewis structure:
Write the Lewis structure for the following molecules
Hydroxylamine (NH3O)
Hydrazine N2H4
Draw the Lewis structures for all the important resonance form of NO-2.
The following structures do not obey the octet rule. Draw a Lewis structure for each and state the type of octet-rule exception.
1. PF-62. XeF23. BH3
Draw the Lewis structure with lowest formal charges, and determine the charge on each atom in OCS.
Draw the Lewis structure for molecules
CH3OCH2CH3 and
CH3COCH3. Then...
a) indicate the location of the partial charges
b) Identify their molecular dipole moments.
For each of the following molecules, draw the most preferred
Lewis structure and label each of the atoms with its formal charge.
Question to consider: What is/are the main criteria for drawing a
preferred Lewis structure? (a) TeF5 – (b) NO2 +
Predict all bond angles and the shape of the molecules and
ions. (draw Lewis structure first)
BF4-
HCO3-
CH3CHO
CH3COOH. 2.Indicate the polarity of the following
molecules. Draw Lewis structure and point out the polarity of each
chemical bond and then point our the polarity of the molecule.
CH2Cl2
HCN
H2O2
CH3CN
Two of these molecules / polyatomic ions cannot be adequately
described using a single Lewis structure. Check the two formulas
that must be written as a combination of resonance structures.
Check all that apply:
A) HCN
B) OF2
C) NH4
D) O3
E) H2CO
F) NO3^-