UV-visible spectrum of a transition metal complex (d3 - d8) from internet . Assign the peaks and ...

Inorganic ChemistryFourth EditionPeter Atkins, Tina Overton, Jonathan Rourke, Mark Weller, and Fraser Armstrong848 pages | 1500 colour line drawings | 276x219mm978-0-19-926463-6 | Paperback | 26 January 2006Price:  £39.99

1. Exercises on page 489

•19.15 to 19.23

2. Find a UV-visible spectrum of a transition metal complex (d3 - d8) from internet . Assign the peaks and using the appropriate Tanabe –Sugano diagram calculate for the complex.

ASSIGNMENT.

Assigning transitions(blue arrow reproduces observed transitions)

Cr(NH3)63+

Two allowed, one forbidden transition

21550cm-1

28500cm-1

Analysis of Tanabe Sugano -Using Ruler to find ratio

Get the Ratio of v2/v1=28500/215500=1.32

Now,using a ruler.Find a y value by moving the ruler along the x axis and find the ratio approximately at 1.32

4T2g

4T1g

Approximately 1.30 at 33.0

4T2g 4A2g

4T1g 4A2g

From the Tanabe –Sugano diagram

It’s mean that

32.8B=21550cm-1

So B=657cm-1

cm-1