The UV-VIS spectrum of a CH3CN solution (2.0 x 10°5 mol dm 3) of an iron(II) complex is: λmax(ϵ) = 245 (48 200), 276 (74 J00), 284 (81 700), 324 (45 100), 569 nm (25 000 dm3 mol 1 cm-1). A quartz cuvette with path length 1 cm was used for the measurement,
(a) Explain why the compound is coloured. What colour do you cxpecl the compound to be?
(b) Which is the lowest energy absoiption? Rationalize your answer,
(c) The initial data were recorded as a plot of absorbance against wavelength. What was the value of Amax for the band at 245 nm?
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