CHE4801 OCTOBER/NOVEMBER 2016 QUESTIONI (a) Refer to the Tanabe-Sugano diagram for a d'complex in an octahedral field given in Appendix A and answer the questions below (I) What is the ground state-free ion term (absence of a ligand field) for this configuration? (n Draw this d-electron configuration (ini) What is the ground term for the d' configuration in a weak O,land field? (iv) Draw this d-electron configuration (v) Give the spin-allowed transition(s) expected for a low-spin complex when Î0B-20 v) What is the ground term for the d'configuration in a strong O, lhgand field? (vn) Draw this d-electron configuration (vii Suggest two complexes, one with a strong field and the other with a weak field, whose electronic spectra could be explaned using this diagram (b) Consider the hypothetical UV-Vis absorption spectra of a d' octahedral complex given below Spectrum A is the expected spectrum whereas Spectrum B is the observed spectrum Provide an explanation for the observed peaks in the Spectrum B Ililustrate your answer with suitable orbital energy level diagrams Absorbance Absorbance Wavelength Wavelength Spectrum A Spectrum B 120]