Chemistry, asked by PCB123, 1 year ago

How to identify High Spin or Low Spin Complex ?

Answers

Answered by Milans88

A low spin would have used its inner d orbitals if you are asking about transitional metal ligands. Its caused due to the pairing up of electrons of orbitals and cancelling the electron spins. Its due to strong ligands as they have high electric field causing electron pairing up.
This is all reverse for High spin complex.

PCB123: So how to find hydridization ? like Ni(CO)4

Milans88: just draw 5 boxes and put electrons as in configuration and make them pair up if its strong ligand like CO

Milans88: here Ni will have sp3

Milans88: the e in the 4s will be transferred to 3d

Milans88: 4s will be empty

Milans88: ligand take or gives es to 4s and outer 5p orbitals

Milans88: sp3 hybridised orbitals are formed

Answered by Anonymous

One method to determine the spin of a complex is to look at its field strength and the wavelength of color it absorbs.
If the field is strong, it will have few unpaired electrons and thus low spin.
If the field is weak, it will have more unpaired electrons and thus high spin.

In terms of wavelength, a field that absorbs high energy photons (low wavelength light) has low spin and a field that absorbs low energy photons (high wavelength light) has high spin.

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