Actually the alkenes are the compounds that have a double bond between two carbon atoms. In the formulas given above in case of ethene we have two carbon atoms but in case of methene (just supposing actually it can’t even exist) there isn’t any second carbon atom with which it could make a double bond.
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Why are the noble gases chemically inert?
The outer or valence shell of these elements is complete. And they need not to make any bond. They do not share or transfer the electrons . Due to fully filled orbitals, Their ionisation enthalpies are also very high. So removing an electron from them is also very difficult. The examples of these are Helium,Continue reading “Why are the noble gases chemically inert?”
Why does phosphorus form P4 exists but P2 do not exists?
The P2 molecule of phosphorus is not found because of the larger size of the phosphorus atom. The phosphorus is so larger that the p-orbitals which are required to overlapp sideways , are unable to overlapp sufficiently to make a pie bond. Below is the structure of oxygen atom that is showing π-bond But phosphorusContinue reading “Why does phosphorus form P4 exists but P2 do not exists?”
[SiF6]2- exist but [CF6]2- does not, why?
A nice question both silicon and carbon belong to group 14 and have 4 electrons in the outermost shell. Their general valency is 4 , but silicon and other elements show higher oxidation states also. Only carbon is the element in group 14 elements that do not have vacant d-orbital. All other elements like siliconContinue reading “[SiF6]2- exist but [CF6]2- does not, why?”
Why is an ionic bond not double or triple like a covalent bond?
To understand this we have to go in depth , that how the ionic bond is formed? Ionic bond is a bond basically formed due to strong electrostatic forces of attraction which is totally different from the covalent bond. Ionic bond is formed between atoms with very different ionisation energy and electron affinity. This situationContinue reading “Why is an ionic bond not double or triple like a covalent bond?”
Why does a covalent bond not form a crystal lattice?
Covalent bond and ionic bond has a very basic difference that is presence of ions or not. The ionic bonds are not limited to one ion only, actually they keep on joining again and again because they are held together by basically the electrostatic forces, due to the oppositely charged ions. lets take example ofContinue reading “Why does a covalent bond not form a crystal lattice?”
Is Br2 an ionic or a covalent bond?
Br2 is a homoatomic molecule, a molecule with same kind of atoms. So here the electronegativity of both the atoms is same so the shared pair is equally attracted by the two atoms. There is not a chance of transfer of electrons from one atom to another. And thus they go for sharing of electronsContinue reading “Is Br2 an ionic or a covalent bond?”
Why the diastereomers of optically active compounds are optically inactive?
Firstly let us discuss what are optically active compounds? These are the compounds that rotate the plane of polarized light. Now Diastereomers are basically mirror images of two optically active compounds. They rotate the plane of polarized light, either to the left side or to the right. If they are present together, they cancel theContinue reading “Why the diastereomers of optically active compounds are optically inactive?”
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