Uv-visible Spectrum Of A Transition Metal Complex (d3 - D8) From Internet . Assign The Peaks And Using The Appropriate Tanabe –sugano Diagram Calculate Do For The Complex.

ASSIGNMENT. Inorganic Chemistry Fourth Edition Peter Atkins, Tina Overton, Jonathan Rourke, Mark Weller, and Fraser Armstrong 848 pages | 1500 colour line drawings | 276x219mm 978-0-19-926463-6 | Paperback | 26 January 2006 Price: £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 ∆ο for the complex.

Cr(NH3)63+

Assigning transitions (blue arrow reproduces observed transitions)

21550cm-1 28500cm-1

Two allowed, one forbidden transition

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 T2g

4

Approximately 1.30 at 33.0 T1g

4

4

T2g ← 4A2g

4

T1g ← 4A2g

From the Tanabe –Sugano diagram ∆ο/Β =33.0 It’s mean that 32.8B=21550cm-1 So B=657cm-1 ∆ο=21700 cm-1