good morning. bacira akther khatun lecturer department of chemistry comilla cadet college presented...
TRANSCRIPT
Good Morning
Bacira Akther Khatun Lecturer Department of Chemistry Comilla Cadet College
Presented By
Class : XI From : A
Duration of the period : 40 Minutes
Date : 08-03-2013
Metal
Alloy Metal
DuraluminAl – 95% Cu -4% Mg- 0.5% Mn- 0.4%
IntroToday’s topic
Hybridization - SP3
By the end of this class they will be able to
1. say what is Hybridization2. say Characteristics of Hybridization 3. explain formation of SP3 Hybridization
4. analyze shape and bond angles of molecule having SP3 hybrid
Atomic Orbitals
Valence bond theory Number of unpaired electron indicates valency
HClO
1S1 - 1 1s22p6 3s23p5 - 2 1s2 2s2 2p4 - 2
1 12
Be BC
1s2 2s2 - 0 1s22s2px1 - 1 1s2 2s2 2px1 2py1 - 2
234
CH4
Be BC
1s2 2s1 2px1 - 2
1s22s2 2px1 2py - 3
1s2 2s1 2px1 2py
1 2pz1 - 4
234
Excited state
In CH4 C -H → 415 kj/mol H- C – H 1090 28`
Hybridization Theory
Two or more 0rbital nearly same
Pauling lius , USA. 1901- 1994
Carbon atom in its ground state
Excited state
Sp3 state
Sp
2S
2S
2p
2S 1S
2S
2p
Carbon atom in its ground state
Excited state Sp3 state
Hybrid Atomic Orbitals
Hybridization
Hybridization is a process (not phenomenon) of mixing up of two or more atomic orbitals to form equal number of orbitals of equal strength. The orbitals which are formed are known as hybrid orbitals
The energy of each hybrid orbital is lower than the participating atomic orbitals.
a process atomic orbitals
mixing up equal number
equal strength
Every body will do this work --- within -- 5 min
Write down the center atom hybridization of the following compound and ion CH4 CCl4 SiH4 NH3 BH3
-
The number of hybridized orbitals is equal to the number of orbitals being hybridized.
The hybrid orbitals are identical in shape and have equivalent energy.
The hybrid orbitals are more effective in forming stable bonds than the pure ones.
The type of hybridization indicates the geometry of the molecules
Characteristics of hybridization:
Type of Hybridization
Group Work - Dear cadets, divide into five groups
Draw the bond angel and name of the shape of the following molecules : within 5min
Group - 1 → CH4 Group - 2 → SiF4 Group - 3 → NH4
+ Group - 4 → H2O Group - 5 → F2O
Tetrahedral , 109. 50 (1,2,3)
C:\Users\College\Videos\vlc-record-2013-0
Molecular shape and orbital hybridization Video
Shape 1
Shape-2
Shape-3
Shape- 4
Shape 5
V – shape , 104.50
lp - lp > lp - bp > bp – bp
lp - lp > lp - bp > bp – bp
lp - lp > lp - bp > bp – bp
Prep task Observe the following chart and answer the question
Analyze the following compounds shape with the figure of Hybridization (1) TA4
- (2) RA4 (3) qA4+ (4)A2Z (5) RY4 (6) SY4 (7) A2P (8) SX4
(9) X2Z (10) pY2
Group → Periods↓
IA IIIA IVA VA VIA VIIA
1 A
2 T R q z X
3 S p Y
Every body will finished the prep task by next Monday And submitted it
Next day topic SP2 & SP
Thanks to all