What is mean by crystal field splitting?, Chemistry

The Crystal Field Theory experiment shows the effects on metal d orbital energies of moving a set of negative point charges close to a metal ion. As one would expect, the energies of the d orbitals rise as the negative charges approach the metal ion, owing to the repulsions among the d orbital electrons and the surrounding charge.

If the surrounding negative charge is spherically symmetric, all five d orbitals are equally affected. In practice, the surrounding negative charge is never spherically distributed, due to the charge is associated with specific ions that occupy specific positions. The consequence is each d orbital is affected differently, and how a particular d orbital is affected depends upon the geometry of the surrounding point charges. This effect is clearly seen in the splitting of the energy levels for the five d orbitals. When point charge enters a region of high electron density, the orbital energy rises significantly owing to the repulsion among the electron and the point charge. When the point charge approaches the ion along a nodal surface, the orbital energy does not increase as greatly.

The results from the Crystal Field Theory experiment are summarized in the chart shown below. Every geometry of point charges (linear, square planar, tetrahedral, or octahedral) makes a characteristic splitting pattern for the five d orbitals (xy, xz, yz, x2-y2, and z2). If you do not understand why the d orbitals split to form these specific patterns, revisit the previous experiment and carefully examine whether the point charges enter regions of high electron density or approach along nodal surfaces for a particular geometry and d orbital.

Posted Date: 3/12/2013 2:29:55 AM | Location : United States

Related Discussions:- What is mean by crystal field splitting?, Assignment Help, Ask Question on What is mean by crystal field splitting?, Get Answer, Expert's Help, What is mean by crystal field splitting? Discussions

Write discussion on What is mean by crystal field splitting?
Your posts are moderated
Related Questions
The oxygen of the hydronium ion The oxygen of the hydronium ion has approximately tetrahedral geometry and is therefore sp 3- hybridized. Two of the sp 3 hybrid orbitals conta

Consider a 2-component system of cyclooctane(1) and styrene(2) at 350 °C. Both component can be well described with the Soave-Redlich-Kwong equation of state in the mixed vapor and

The Carnot cycle consists of four processes in succession: 1. isothermal compression from T L , V 1 to T L , V 2 2. adiabatic compression from T L , V 2 to T H , V 3 3

The gas stream from a sulfur burner is composed of 15-mol% SO 2 , 20-mol% O 2 , and 65-mol% N 2 .  This gas stream at 1 bar and 680°C enters a catalytic converter, where the SO 2

Caesiurn chloride crystallises as a body centred cubic lattice and has a density of 4.0 g cm -3 . Calculate the length of the edge of the unit cell of caesium chloride crystal.

Experiment on Archimedes'  principle Solder a cycle valve to single half of a copper ball tap float. Load inside the other half with lead or lead shot unless the whole just flo

The table below gives intrinsic viscosity values explained by viscometry and weight- average molar mass values explained under the similar  conditions by static light scattering

The electronic configuration  1s 2 , 2s 2 , 2p 1 x , 2p 1 z : (1) Oxygen           (2) Nitrogen          (3) Hydrogen     (4) Fluorine Ans: Nitrogen

Draw C5H10O2 that has the following 1H NMR spectrum: 1.15 (t, 3 H), 1.25 (t, 3 H), 2.33 (q, 2 H), 4.13 (q, 2 H).

The set of quantum numbers n= 3, l=0, m=0, s= -1/2 belongs to the element: (1) Mg                   (2) Na        (3) Ne                (4) F Ans: Mg