Question

please help me with #1-5. thisbis inorganic chemistry

1. Determine the number of Infrared and Raman active bands for the following compounds. с в с с A в с вв (a) (b) 2. a) Build the molecular orbital energy diagram for the following molecules, O2,0 2+ and O2.. b) Calculate the bond order for the three molecules, and justify which one is more stable. 3. How many unpaired electrons would you expect for the following complexes: (CoCl] [Cr(NH).] and (Cr(H2O) ? 4. KMnO, was expected to show no absorption bands at all. But, surprisingly potassium permanganate has a strong absorption band. Why? 5. Suggest a reason why zinc(II) compounds are often colorless. Spectrochemical series: CO = CN > phen > NO2 > en > NH3> NCS > H2O > F">RCOO > OH > C > Br >

Answer 1

| Trans / B B [cisi vibrational = 2(A1, B₂). Raman[AB] active mode Vibrational = 1 (Bu) Raman [A-cland (A -BL achve modes . MOT for 2 MOT for of O ovomez 0 1-767 Tu Ry 1 1 1 16 1 1 172 14 1 18 2P 767' 28 '1L 1L !! 2P L'.! 622 -16 7 oas 11, 6 Bond order = Bonding -Autibonding mot for at for 0 = 8 - 7 = 2 1111 1111 for on = 8-5 = 15 2p 12L 16, 2p for out = 9-3 = 215 1L - Higher value of B.o. higher will be the stability Hence > > 0 Stability order 23 1Lr

③ [colla 3 or [Co 3f] 60347 48°3d m11711 (1) | [ca(it) ] 3t or [6,3t] ( 3 ) 450 3d² (111717 3- unpaired electrons Tr (120)] or [co 3t] (734 -> 45° 30° hlad 2- unpaired elechons. 3d electrons. ed KMnO4 kt + Mn Oa MnO4 and mu+7 4 3 d 7 which have empty & and p orbitals. * it doen't have ele chons to show transition ( dd). * But Im not shows LMCT ( Ligend to Metal charge Transfer) which shows absorption band. mnt 7 OT 3d ↑ charge transfer 14711 2e 02- © According Zu(I) means zu 2+ = 45° 3do It has filled 3d orbitals, due to which no gap is present to promote an elechon, hence shows colourless and some of then absorbed in UV region.
​​​​​ Inorganic complexes show transitions.