Principles of Organic Chemistry CA (CHMS2203)

Biological Science - BS

Semester: Second Semester

Level: 200

Year: 2014

Answers (200 )
THE UNIVERSITY OF BAMENDA
UNIVERSITE DE BAMENDA
FACULTY OF SCIENCE
FACULTE DES SCIENCES
Department of Chemistry department de Chimie
Principle of Organic Chemistry (CHMS2203)
Continous Assesment Academic year 2013/2014 Allowed time 2hrs
Options involved: Applied Botany, Applied Zoology, Biochemistry, Geology, Microbiology
By Dr BANKEU
Exercise 1: (05 Marks)
a) Define the following terms: orbital, node 1pt
b) -Give the Hund’s rule. 0.5pt
c) Write the electronic configuration of N
2
. 0.5pt
d) Is N
2
a paramagnetic molecule? Why? 1pt
e) 0.75pt
The corresponding scheme is the molecular
Orbital diagram of hydrogen fluoride. Justify in a
Short sentence. Why is the 1s orbital of the hydrogen
Is of higher energy compared to the 2p orbital of
the fluorine atom.
f) Give structural formulae for 2-bromobutane (dot, dash, condensed, bond-line and three-dimensional
structures) 1.25pt
Exercise 2: (05 marks)
a)- For the following write all possible resonance structures! Be Sure to include formal charges where
appropriate.
b)- Show the curved arrows that would convert A to B.
c) Which of the following compounds would you expect to have a dipole moment? If the molecule has a
dipole moment, specify its direction.
(a) CH
4
(d) CH
3
Cl (b) H
2
O
d)-
H
2
C
-
C
=
C
-
CH
,
----
--------
H H "
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