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Syamala Devi Nukella 8 years, 4 months ago
An inductive effect is an electronic effect due to the polarisation of σ bonds within a molecule or ion. This is typically due to an electronegatvity difference between the atoms at either end of the bond.
Posted by Nick Agrawal 8 years, 4 months ago
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Syamala Devi Nukella 8 years, 4 months ago
Pyridine is a basic heterocyclic organic compound with the chemical formula C₅H₅N. It is structurally related to benzene, with one methine group replaced by a nitrogen atom
<a href="https://www.google.co.in/search?rlz=1C1CHBD_enUS750US750&q=pyridine+formula&stick=H4sIAAAAAAAAAOPgE-LQz9U3MK0yytBSz0620k_OSM3NLC4pqoSwkhNz4pPzcwvyS_NSrNLyi3JLcxIB5kGBYjUAAAA&sa=X&ved=0ahUKEwj3utCfldfXAhUIrY8KHfInD1IQ6BMIrwEoADAP">Formula</a>: C5H5N
<a href="https://www.google.co.in/search?rlz=1C1CHBD_enUS750US750&q=pyridine+density&stick=H4sIAAAAAAAAAOPgE-LQz9U3MK0yytBSz0620k_OSM3NLC4pqoSwkhNz4pPzcwvyS_NSrFJS84ozSyoBnXMYxTUAAAA&sa=X&ved=0ahUKEwj3utCfldfXAhUIrY8KHfInD1IQ6BMIsgEoADAQ">Density</a>: 982 kg/m³
<a href="https://www.google.co.in/search?rlz=1C1CHBD_enUS750US750&q=pyridine+boiling+point&stick=H4sIAAAAAAAAAOPgE-LQz9U3MK0yytDSzU620k_OSM3NLC4pqoSwkhNz4pPzcwvyS_NSrJLyM3My89IVCvIz80oA48FBAjsAAAA&sa=X&ved=0ahUKEwj3utCfldfXAhUIrY8KHfInD1IQ6BMItQEoADAR">Boiling point</a>: 115.6 °C
<a href="https://www.google.co.in/search?rlz=1C1CHBD_enUS750US750&q=pyridine+molar+mass&stick=H4sIAAAAAAAAAOPgE-LQz9U3MK0yytDSyk620k_OSM3NLC4pqoSwkhNz4pPzcwvyS_NSrHLzcxKLFHITi4sBqw147DgAAAA&sa=X&ved=0ahUKEwj3utCfldfXAhUIrY8KHfInD1IQ6BMIuAEoADAS">Molar mass</a>: 79.1 g/mol
<a href="https://www.google.co.in/search?rlz=1C1CHBD_enUS750US750&q=pyridine+pubchem+cid&stick=H4sIAAAAAAAAAOPgE-LQz9U3MK0yytDSzCi30k_Oz8lJTS7JzM_TT85Izc1MTsyJT87PLcgvzUsptiooTQKJAgDVcnhtNwAAAA&sa=X&ved=0ahUKEwj3utCfldfXAhUIrY8KHfInD1IQ6BMIuwEoADAT">PubChem CID</a>: 1049
Posted by Priyanka Deora 8 years, 4 months ago
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Syamala Devi Nukella 8 years, 4 months ago
The following points will clearly state the limitations of crystal field theory:
- The assumption that the interaction between metal-ligand is purely electrostatic cannot be said to be very realistic.
- This theory takes only d-orbitals of central atom into account. The s and p orbits are not considered for study.
- The theory fails to explain the behavior of certain metals which cause large splitting while others show small splitting. For example, the theory has no explanation as to why H2O is a stronger ligand as compared to OH–.
- The theory rules out the possibility of having p bonding. This is a serious drawback because p bonding is found in many complexes.
- The theory gives no significance to the orbits of the ligands. Therefore it cannot explain any properties related to ligand orbitals and their interaction with metal orbitals.
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