Molecular Modeling of Covalent Compounds - Micaela A....

Micaela A. Jaramillo
November 14, 2016
CHEM 121L
Partners: Morelia Cuevas
Arzoo Rishad
Molecular Modeling of Covalent Compounds
Post Lab Questions
1. Part of the reasoning that led van’t Hoff and Le Bel to propose a tetrahedral shape for Methane, CH
4
,
was
based on the number of compounds that are theoretically possible for substituted Methanes, that is, compounds
in which one or more hydrogens have been replaced by some other group. For example, only on compound of
the type CH
2
X
2
has ever been found. Is this consistent with a tetrahedral shape? With a square shape? Provide
an explanation for each answer using appropriate diagrams.
2. For H
2
O, the H-O-H bond angle is 104.5° and the measure dipole moment is 1.85 Debye. What is the
magnitude of the O-H bond dipole moment for H
2
O? Estimate the bond angle in H
2
S given that the H-S bond
dipole moment is 0.67 Debye and the resultant molecular dipole moment is 0.95 Debye.