The electronic absorption spectrum of [Co(OH 2 ) 6 ] 2+ exhibits bands at 8100, 16000 and
Question:
The electronic absorption spectrum of [Co(OH2)6]2+ exhibits bands at 8100, 16000 and 19400 cm–1.
(a) Assign these bands to electronic transitions.
(b) The value of Δoct for [Co(OH2)6]2+ listed in Table 20.2 is 9300 cm–1. What value of Δoct would you obtain using the diagram in Fig. 20.23b? Why does the calculated value not match that in Table 20.2?
Table 20.2.
Figure 20.23(b).
Transcribed Image Text:
Complex [TiF6³- [Ti(OH₂)6]³+ [V(OH₂)6]³+ [V(OH₂)]²+ [CrF6³- 13+ [Cr(OH₂)6]³+ [Cr(OH₂)6]²+ [Cr(NH3)6]³+ [Cr (CN)6]³- [MnF²- [Fe(OH₂)6³ [Fe(OH₂)6]²+ 12+ 13+ A/cm-¹ 17 000 20 300 17 850 12 400 15 000 17 400 14 100 21 600 26 600 21 800 13 700 9 400 Complex [Fe(ox) 3³- 13- [Fe(CN)6]³- [Fe(CN)6]¹ [CoF6³- [Co(NH3)6]³+ [Co(NH3)6]2+ [Co(en)3]³+ 13+ 12+ [Co(OH₂)6] [Co(OH₂)6] [Ni(OH₂)6]²+ [Ni(NH3)62 [Ni(en)3]²+ 12+ A/cm-¹ 14100 35.000 33 800 13 100 22900 10 200 24000 18 200 9300 8 500 10 800 11 500
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