a. In the absorption spectrum of the complex ion Cr(NCS)63−, there is a band corresponding to the absorption of a photon of light with an energy of 1.75 × 104 cm-1. Given 1 cm−1 = 1.986 × 10−23 J, what is the wavelength of this photon?
b. The Cr—N—C bond angle in Cr(NCS)63− is predicted to be 180°. What is the hybridization of the N atom in the Ncs- ligand when a Lewis acid-base reaction occurs between Cr3+ and NCs- that would give a 180° Cr−N−C bond angle? Cr(NCS)63− undergoes substitution by ethylenediamine (en) according to the equation
Does Cr(NCS)2(en)2+ exhibit geometric isomerism? Does Cr(NCS)2(en)2+ exhibit optical isomerism?
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Chapter 21 Solutions
Chemistry
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