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D-metal complexes: Electronic structure and properties - Crystal field theory

10 important questions on D-metal complexes: Electronic structure and properties - Crystal field theory

How is the energy seperation of two sets of orbitals called?

Ligand-field splitting parameter delta O

What is referred to as strong field ligand?

A ligand that gives rise to a high-energy transition (Such as CO)

What is referred to as a weak ligand?

A ligand that gives rise to a low-energy transition.

If deltao>P, how is this called?

Low spin complex, species with the greater number of parallel electron spins (pared spins) Diamagnetic

What is known to be the Jahn-Teller effect?

If the ground electronic configuration of a nonlinear complex is orbitally degenerate, and symmetrically filled, then the complex distorts so as to remove the degeneracy and achieve a lower energy.

D8 metal complexes of the second and third row transition metals have a strong preference for obtaining a square planar geometry, explain why.

Metal complexes with coordination number of 4 can have two geometry's, the sterically favourable geometry of the favourable square planar form. A d8 metal complex with a tetrahedral geometry would result in two unpaired electrons in the dsigma orbitals. In a square planar geometry 8 electron can be spin paired in the four low energy orbitals.

Determine of [(Co(NH3)6]3+ the configuration, the number of unpaired electrons and the LFSE. Use the spectrochemical series to decide if it is likely to be high or low spin.

NH3= neutral --> charge of Co is therefore 3+, ground state of Cobalt = 9 --> 3d6. NH3 is a strong field ligand --> Low spin(Electrons are filled parallel) configuration is therefore t2g^6 --> -0.4 * 6 + 3P = -2,4 deltao + 3P

How are complexes with a lower than ideal electron count called? And what does it result in?

Electron deficient/ coordinately unsaturated --> Makes them electrophilic susceptible to attack by nucleophiles

What is the difference between paramagnetic and diamagnetic

Paramagnetic: Unpaired electrons, diamagnetic: Paired electrons

What do we talk about, then talking about the energy of an orbital?

We talk about the amount we have to pay to to put electrons into an empty ortbital

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Inorganic Chemistry | 9780199641826

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D-metal complexes: Electronic structure and properties - Crystal field theory

10 important questions on D-metal complexes: Electronic structure and properties - Crystal field theory

How is the energy seperation of two sets of orbitals called?

What is referred to as strong field ligand?

What is referred to as a weak ligand?

If deltao>P, how is this called?

What is known to be the Jahn-Teller effect?

D8 metal complexes of the second and third row transition metals have a strong preference for obtaining a square planar geometry, explain why.

Determine of [(Co(NH3)6]3+ the configuration, the number of unpaired electrons and the LFSE. Use the spectrochemical series to decide if it is likely to be high or low spin.

How are complexes with a lower than ideal electron count called? And what does it result in?

What is the difference between paramagnetic and diamagnetic

What do we talk about, then talking about the energy of an orbital?

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