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.
![Homework #3
2. Given each of the following words of chemistry that apply to configurations of molecules.
Draw TWO structures which exhibit the arrangement of atoms in space.
page 2
(a) Enantiomers:
(b) diastereomers
(c) Meso form (with no ring)
(d) Meso form (cyclic)
(e) A D-tetrose (in Fischer projection
(f) An L-a-amino acid
4.Givrn the following six lettered pairs of structures. Place the letter in the following blanks:
Enantiomers
[If the pairs are different conformation of the same molecule, they are the same molecule]
diastereomers,
same
CH2
(A)
NH3
Br
at3
-014
uks
CH3
CO2H
toH
tub Hot
(F)
H.
at3
(D)
(E)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5d256dc4-bcce-442c-9640-3cbb1b9e530f%2F8bcfdcaf-e201-44b5-b150-f0f1ab02b094%2F39szkwm_processed.jpeg&w=3840&q=75)
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