Why do polar molecules disassociate in an aqueous solution even though hydrogen bonds are weaker than the ionic or covalent bonds holding the molecule together?
Perkin reaction
Perkin reaction This reaction is used in the synthesis of β-aryl-acrylic acid. This reaction is mostly used for the prepration of cinnamic acid. Coumerin, a flavouring agent is also prepared by this method.
A chemical bond
Chemical bond may be defined as the force of attraction by which two atoms are held together. The chemical bonds lead to the formation of molecules and crystals. There are […]
The second electron affinity of oxygen is positive, what does that mean?
There are two major reasons for this:- The interelectronic repulsions are the major reason for this phenomenon. The inner electrons repell upcoming electrons due to high electron density. The size of oxygen is small due to this the atom becomes less stable on addition of 2nd electron.
What is the difference between stereoisomers, optical isomers and enantiomers?
Stereoisomers:- these are the compounds that have same molecular formula but different arrangement of atoms in the space. Optical isomers:- the compunds that have same molecular formula but they rotate the plane polarised light to the different side, right side-dextrorotatory and left levorotatory. Enantiomer:- these are the compounds that are mirror images of each other and if they are present […]
