A metal atom is large, so the nucleus cannot attract and hold its outermost electrons. The metal loses those electrons and becomes positively charged kernels. The electrons then flow in the solid structure passing between these positive kernels.
The Lewis dot structures are used to show the shared electron pairs between the bonded atoms in the molecule and the lone pairs of electrons if any. The representative structures follow the octet rule wherein the atoms combine by either transfer of electrons (loss or gain) or by sharing of valence electrons in a way that the valence shell of the atoms attains the octet configuration.
The electrons involved are shown as dots. A single bond is made up of two electrons, a double four and a triple bond six. Similarly, an atom can have one, two or three lone pairs of electrons.
Identifying a change is the first step in solving or designing a chemical reaction.
An atom or group of atoms that can pull the bond electrons towards itself or push the bond electrons from itself and decreasingly transmit the effect along the sigma (σ) bonds of the carbon chain inducing permanent polarization in the molecule. Such an effect is called the Inductive effect.
Learning Objective: To study the ambident nucleophiles and how and from which end they attack the substrates to undergo chemical reactions.
Skill Level - Intermediate
Prerequisites:
Learning Objective: To study the common names of open-chain and closed-chain conformations and their stability.
Skill Level - Intermediate
Prerequisites:
An equimolar (1:1) mixture of a Lewis acid anhydrous ZnCl2 and concentrated HCl- Lucas Reagent, is used to identify and classify unknown alcohol (R-OH) as primary (1o), secondary (2o) or tertiary (3o). The Lucas test is based on the speed at which corresponding insoluble alkyl chlorides (R-Cl) are formed post reaction. The formation of alkyl chlorides solution appears as cloudiness/emulsion, and it is correlated with the reactivity of the alcohol, 3o alcohol being the most and 1o being the least.
Free radicals are generated due to the homolytic bond cleavage, a type of bond breaking where each atom holding the two-electron covalent bond gets one electron. Such a homolytic bond cleavage requires an input of energy, either in the form of heat or light.
Learning Objective: To learn about the intermolecular forces and how they impact an organic compound's physical properties.
Skill Level - Intermediate
Prerequisites:
Benzene | Benzyne | |
|---|---|---|
Identification | Alternating single and double bonds. | Alternating single and double bonds plus an extra pie bond (triple bond) between two adjacent carbons. |
Structure |