Answer
Verified
377.4k+ views
Hint: The Crystal Field Theory is a paradigm for the bonding relationship between transition metals and ligands. Hans Bethe and VanVleck introduced the crystal field theory. The attraction between the metal cation’s positive charge and the negative charge of the ligand's non-bonding electrons is explained by the Crystal Field Theory.
Complete answer:
Crystal field theory discusses the destruction of degeneracies of electron orbital states, generally $d$ or $f$ orbitals, caused by a static electric field created by a surrounding charge distribution.
The arrangements of pentavalent coordination compounds are trigonal bipyramidal. The $CO$ group is a neutrally charged, heavy field ligand and it forces electron pairing. This produces a \[dsp3\] hybrid orbital by the hybridisation of one pair of d electrons from the $3d$ orbital, one pair of $s$ electrons from the $4s$ orbital, and three pairs of $p$ electrons from the $4p$ orbital. This explains the molecule's trigonal bipyramidal structure.
$Fe{\left( {CO} \right)_5}$ has a trigonal bipyramidal configuration with the $Fe$ atom being enclosed by five $CO$ ligands, three of which are equatorial and two of which are axially bound. Each of the \[Fe-C-O\] linkages are linear. The Berry mechanism results in a comparatively low rate of interchange between the axial $CO$ and equatorial groups in $Fe{\left( {CO} \right)_5}$ .
Note:
It must be noted that the Crystal Field theory excludes the existence of $p$ bonding. Which is a significant disadvantage since it is present in many complexes. The orbits of the ligands have little significance in the theory. As a result, it cannot justify any properties of ligand orbitals or their interactions with metal orbitals.
Complete answer:
Crystal field theory discusses the destruction of degeneracies of electron orbital states, generally $d$ or $f$ orbitals, caused by a static electric field created by a surrounding charge distribution.
The arrangements of pentavalent coordination compounds are trigonal bipyramidal. The $CO$ group is a neutrally charged, heavy field ligand and it forces electron pairing. This produces a \[dsp3\] hybrid orbital by the hybridisation of one pair of d electrons from the $3d$ orbital, one pair of $s$ electrons from the $4s$ orbital, and three pairs of $p$ electrons from the $4p$ orbital. This explains the molecule's trigonal bipyramidal structure.
$Fe{\left( {CO} \right)_5}$ has a trigonal bipyramidal configuration with the $Fe$ atom being enclosed by five $CO$ ligands, three of which are equatorial and two of which are axially bound. Each of the \[Fe-C-O\] linkages are linear. The Berry mechanism results in a comparatively low rate of interchange between the axial $CO$ and equatorial groups in $Fe{\left( {CO} \right)_5}$ .
Note:
It must be noted that the Crystal Field theory excludes the existence of $p$ bonding. Which is a significant disadvantage since it is present in many complexes. The orbits of the ligands have little significance in the theory. As a result, it cannot justify any properties of ligand orbitals or their interactions with metal orbitals.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
In Indian rupees 1 trillion is equal to how many c class 8 maths CBSE
Which are the Top 10 Largest Countries of the World?
How do you graph the function fx 4x class 9 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Why is there a time difference of about 5 hours between class 10 social science CBSE