Question

please explain clearly every steps, especially (c)

3. The do complex [Ni(NH3)c]2+ (NHs is a strong field ligand) absorbs visible light of energy equal to 2.17 eV. (a) What is the value of the ligand field stabilization energy (LFSE) in terms of Ao? (b) What is the wavelength, in nm, of the light that is absorbed? (1 eV = 1.602 x 10-19 J, C = 3.00 x 108 m/s, h = 6.626 x 10-34 J.s, 10 nm = 1 m). (c) What color would you expect this complex to be?

Answer 1

A compound shows the color which is complementary to the color which is absorbed by it. Here the compound absorb in yellow range, so it will be of purple or blue color. Explained below

@ Niet is as system. The electronic configuration is - + I eg 4 At It tag LF5E = 6(-0.440) + 2 (0.6 m.) = -120.. 6 Absorbed energy = 2.17 er .3 2.17 X11602x16993 2 E-hea 1.0, 2.1.7x1602 x 10'9; los 2:1.7x19602x10. J D61626710347 * 3 * 10 m/s 6626*16*347 3 x 108 2 .09, da IZR1 6027 10-15 m 7.571.8x1679m → 5718 nm So, Wavelength of light absorbed = 571,8 mi ③ e The absorbed light is in yellow range (571.8mm) So, the compound will show complementary colour of yellow. So, the colopor of the compound is purple asblue,