Chapter One Flashcards
Organic Chemistry? old definition
Study of compounds extracted from Living organism
Natural products need a VITAL FORCE
Organic chemistry? modern?
Chemistry of carbon compounds
how to determine the Valence electron
The number of valence electrons is equal to the atom’s main group number.
Carbon is …
- has four valence electron
- always tetravalent( forms 4 bonds)
Covalent bond is:
Sharing electron in space
attraction of opposite charges are…
Ionic bond
What is orbital atomic?
Mathematic function that describes the high probability to find
an electron around the nucleus
Sigma bonds are formed…
by overlapping of 2 atomic orbitals
T/F: for every sigma bond, there is an antibonding.
True
T/F:s-s can form only a single bond
True
p-p Overlap(sigma)
σ covalent bond can also be formed by a linear (horizontal) overlap between
2 Px orbital atomics
Pi bond:
𝑷𝒊 𝞹-covalent bond can be formed by sideways overlap between
2 Py or 2 Pz atomic orbitals
T/F: Sideways overlap of two parallel p orbitals leads to a
p-bonding MO and a
p*-
antibonding MO
true
Complete each:
1. σ bonds can be formed by …
2. 𝞹 bonds can be formed ….
3. σ bond is much stronger than 𝞹 bond (𝞹 much reactive)(T/F)
- s-s, s-px and px-px overlap (linear)
- by py-py and pz-pz overlap (sideways)
- True
Explain how valence shell electron pair repulsive theory works:
a. 4 pairs of electrons around the central atoms: tetrahedral
b. 3 pairs of electrons around the central atoms: trigonal
c. two pairs of electrons around the central atoms: linear
