CO 9: Use models and dash-wedge perspective drawings to draw, interpret, and identify three-dimensional shapes. 1. Use lines, dashes, and wedges to draw a three-dimensional structure for each of the following. You must explicitly draw all atoms. Lone pairs are not required to be drawn. a) H₂CO b) CH₂C=CCI
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![CO 9: Use models and dash-wedge perspective drawings to draw, interpret, and identify
three-dimensional shapes.
1. Use lines, dashes, and wedges to draw a three-dimensional structure for each of the
following. You must explicitly draw all atoms. Lone pairs are not required to be drawn.
a) H₂CO
b) CH₂C=CCI
+Did not add
Double bond
2. Use lines, dashes, and wedges to draw a three-dimensional representation of the geometry
around the metal in each complex:
a) [NiBre] (octahedral)
Did Cs
1
Hill Br
Br
Br
+
a)
trans
totrahedral
C CI
1
b)
b) trans-[RhCl₂(NH₂)2) (square planar)
WH
HIC
HI
RH
A
H
3. Identify the electron-domain geometry of the central atom. Two models are shown of each
structure.
A
AN
HECIWH
clBaci
trigonal bipgromicat](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2a4e1cde-7608-4f9a-be57-27a55d71d1e3%2F2da45ed9-340d-4f3f-b0a9-c3d0c68ce8a5%2Fy6bof5e_processed.jpeg&w=3840&q=75)
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