resonance form

The various contributing structures should have the same arrangements of structures but may differ only in electronic arrangements. The number of unpaired of electrons in all the contributing structures should be the same. All contributing structures should have almost the same energy. T..

The currently accepted structure was developed by the application of the theory of resonance proposed in 1933. This theory states that benzene is a resonance hybrid of the following canonical forms. Resonance hyb..

Phenoxide - Phenoxide is more stabilised by resonance than phenol. In phenol, three contributing structures involve charge separation whereas in case of phenoxide ion there is no charge separatio..

All elements except hydrogen, which form positive ions by losing electrons during chemical reactions are called metals. Thus metals are electropositive elements. They are characterized by bright lustre, hardness, ability to resonate sound and are excellent conductors of heat an..

Structure of the Carboxyl Group - Electron and neutron diffraction studies show that carboxyl group has a planar structure. Thus the carboxylic carbon and the two oxygen atoms in carboxylic group are sp 2 hybridized. The carboxylic carbon forms are (sp 2 - sp 2 ) s - bond with two oxygen ..

Uses of Noble Gases - Argon is used mainly to provide an inert atmosphere in high temperature metallurgical processes (arc welding of metals or alloys) and for filling electric bulbs. It is also used in the laboratory for handling substances that are air-sensitive. Helium is a non-flammable and lig..

i) All elements (except Se) are monoxides. ii) All elements form dioxides of the formula MO 2 . SO 2 is a gas, SeO 2 is a volatile solid while TeO 2 and PoO 2 are non-volatile crystalline solids. Sulphur dioxide has angular structure. It is resonance hybrid of two. ..

Amides are feeble bases. The lone pair of electrons on the nitrogen atom is responsible for the basic character. This lone pair of electrons on nitrogen atom is involved in resonance with the carbonyl group (structure II). Thus the electron pair of nitrogen is not easily available for pr..

. This occurs when the sigma ( s ) electrons of the H-C bond that is attached to an unsaturated system, such as double bond or a benzene ring, enter into conjugation with the unsaturated system. The concept of hyperconjugation was developed by Baker and Nathan and is also known as Baker and Nathan ..