Category: 2nd year

Ionization Potential on The Basis of Molecular Orbital Theory(MOT)

The ionization potential of N-atom is 14.53 eV whereas this value for N2 molecule is 15.56 eV The electronic configuration of N-atom is 1s22s22p3 . The 1st ionization potential of N-atom can be expressed as: On the other hand, the electronic configuration of N2 molecule according to MOT can be given as: One electron is eliminated from π2Px bonding orbital during the ionization process. From the above diagram, we can…

Diborane: Synthesis, Production, Physical and Chemical Properties

Definition: It is a chemical compound that consists of B and H-atoms. Has a molecular formula B2H6, which is the simplest boron hydrides. B2H6 is unstable at the room temperature with a sweet smell B2H6 will ignite rapidly at room temperature B2H6 mix well with the air forming explosive mixtures Production and Synthesis ( Source: Wikipedia): Industrial synthesis of diborane: Diborane is produced on a large scale by the reduction…

Electron Deficient Compounds

Definition Electron deficient compounds are those in which the total number of atomic orbitals on all the atoms of the compound is more than the total number of valence shell electrons. Boranes are electron deficient compounds: B = 1s22s22px12py2pz H = 1s1 B2H6 * number of orbitals from 2 B = 2 X 4 = 8     number of orbitals from 6 H = 6 X 1 = 6 Therefore,…

STYX number and Its Applications

Each boron is attached to at least one hydrogen atom by a two-electron sigma bond. The three-centered B-H-B bond is denoted by S, the closed or free three-centered B-B-B bond is expressed as t, the two-centered B-Ht and B-B bond is denoted by x and y, respectively. As we know that boron compounds are electron-deficient compounds. But if each boron atom forms a three-centered bond, then the bond electron deficiency…

Factors affecting the magnitude of lattice enthalpy

The term lattice enthalpy can be defined by the following ways: The amount of energy released, when one mole of an ionic crystal is made from the requisite number of gaseous cations and anions, is named lattice energy The amount of energy, which is required to break down/ separate one mole of an ionic compound into its constituent isolated gaseous ions The amount of energy, which is liberated when 1…

Factors affecting the magnitude of solvation or hydration energy

Definition of solvation energy: When a gaseous cation or a gaseous anion interacts with the solvents forming a solvated cation or a solvated anion and in this process energy is liberated, which is called solvation energy. If water is used as a solvent, then gaseous cation or gaseous anion forms hydrated ion, and the liberated energy associated with this process is termed as a hydration energy. M + (g) +…

Molecular Orbital Theory

After finishing this lecture, you will be able to : Differentiate between VBT and MOT Explain bond order and stability of molecule/s Discuss the magnetic properties ( paramagnetic and diamagnetic) of molecules Source of Lecture: Online and Essential of Physical Chemistry by B.S. Bahl, G.D. Tuli and Arun Bahl Click here for this lecture

Metallic Bond

After finishing this lecture you will be able to: Define metallic bond Identify elements of periodic table that possess metallic bonds Learn the required conditions for the formation of metallic bond Discuss the factors affecting the strength of metallic bond Explain the formation of metallic bond with the help of examples. Describe the characteristic properties of metallic substances. For PPT Click Here For Downloading Book Click Here

Hydrogen Bonding

After finishing this lecture, you will be able to Know the required conditions for the formation of hydrogen bond Explain the effect of hydrogen bonding on physical properties of compounds Describe biological significance of hydrogen bonding Explain comparative acid strength of organic acids. Source: Advanced Inorganic Chemistry by G. Raj and Online Open Sources Click here to get PPT

Ionic Compounds and Fajan’s Rule

Readers will be able to : Learn the required conditions for the formation of ionic compounds between two elements. Explain the basic properties of ionic compounds Describe the covalent character of ionic compounds. For PPT Click Here Source : Inorganic Chemistry by R.D. Madan Online (Searching by Google)

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