Hybridisation of Chromate Ion Explained

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The discussion centers on the hybridization of the chromate ion, with participants expressing confusion about its structure. It is suggested that the chromate ion is better described using d3s hybridization rather than sp3, as the p orbitals in the highly charged chromium VI ion are at a higher energy level than the d orbitals. This hybridization leads to a tetrahedral shape when considering the unequal directions along the diagonals of a cube. The role of the inner 3s orbital is clarified, noting that it is too low in energy and fully filled to participate in bonding. Additionally, the chromate ion is confirmed to be a complex ion.
Karan Punjabi
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Can some one explain the structure of chromate ion on the basis of hybridisation cause I'm a bit confused I googled about it and there are posts like explaining it as sp3 hybridised ion. Explain please.
 
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Karan Punjabi said:
Can some one explain the structure of chromate ion on the basis of hybridisation cause I'm a bit confused I googled about it and there are posts like explaining it as sp3 hybridised ion. Explain please.
Guys please help me.
 
If you really want to describe transition metal compounds in terms of hybrids, I would rather go for ##d^3s## than ##sp^3##, as the p orbitals in a highly charged ion like chromium VI are energetically much higher than the d orbitals. The d3s hybrids are directed along the diagonals of a cube. If you allow for a small substitution of d for p, the two directions along the diagonal become unequal and you will get a more tetrahedral shape.
 
DrDu said:
If you really want to describe transition metal compounds in terms of hybrids, I would rather go for ##d^3s## than ##sp^3##, as the p orbitals in a highly charged ion like chromium VI are energetically much higher than the d orbitals. The d3s hybrids are directed along the diagonals of a cube. If you allow for a small substitution of d for p, the two directions along the diagonal become unequal and you will get a more tetrahedral shape.
The inner s orbital ie 3s would be affected by hybridisation or not? And how we are considering hybridisation between 2 orbitals of different shells?
 
The inner 3s orbital is way too low in energy and completely filled. Hence it won't participate in bonding. There is no prinicpal difficulty with hybridizing orbitals of different sub-shells as long as they are of comparable energy and size.
 
DrDu said:
The inner 3s orbital is way too low in energy and completely filled. Hence it won't participate in bonding. There is no prinicpal difficulty with hybridizing orbitals of different sub-shells as long as they are of comparable energy and size.
Got it. One more thing chromate ion is a complex right?
 

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