
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
Lab Manual For Zumdahl/zumdahl's Chemistry, 9th
- Draw the major product of the following reaction. Do not draw inorganic byproducts. H3PO4 OHarrow_forwardPredict the major products of this organic reaction: HBr (1 equiv) Δ ? Some important notes: • Draw the major product, or products, of this reaction in the drawing area below. • You can draw the products in any arrangement you like. • Pay careful attention to the reaction conditions, and only include the major products. • Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. • Note that there is only 1 equivalent of HBr reactant, so you need not consider the case of multiple additions. Explanation Check X ©2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacyarrow_forwardFor the structure below, draw the resonance structure that is indicated by the curved arrow(s). Be sure to include formal charges. :ÖH Modify the second structure given to draw the new resonance structure. Include lone pairs and charges in your structure. Use the + and - tools to add/remove charges to an atom, and use the single bond tool to add/remove double bonds.arrow_forward
- Using the table of Reactants and Products provided in the Hints section, provide the major product (with the correct stereochemistry when applicable) for questions below by selecting the letter that corresponds to the exact chemical structures for the possible product. OH conc Hydrochloric acid 40°C Temp A/arrow_forwardUsing arrows to designate the flow of electrons, complete the reaction below and provide a detailed mechanism for the formation of the product OH conc Hydrochloric acid 40°C Temp All chemical structures should be hand drawn on a piece of paper Paragraph BI UAE +varrow_forwarddraw out the following structures plesearrow_forward
- Draw everything on a piece of paper outlining the synthesis from acetaldehyde to 2 cyclopentene carboxaldehyde using carbon based reagants with 3 carbons or fewers. Here is the attached image.arrow_forwardManoharan Mariappan, FR.D., 34) Complete the following reaction starting from hex-1-yne proceeding via different substitution reactions forming 2-heptanone. (25 pts). A Sia₂BH H₂O₂ NaOH Br D Mechanism for reaction D - ether-cleavage: 10 B Ph-MgCI, THF H₁₂O+ D HBr (XS) C TsCl, Py CH3-CH2-CH2-ONaarrow_forwardIn the table below, the correct structure for (2R)-3-methylpentan-2-ol (IUPAC name) can be represented by the letter OH OH HE > ' ÕH C B OH D A/ E OHarrow_forward
- Predict the major products of the following organic reaction: + A Δ ? Some important notes: • Draw the major product, or products, of the reaction in the drawing area below. • If there aren't any products, because no reaction will take place, check the box below the drawing area instead. Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. Check Click and drag to start drawing a structure. Save For Later 2025 McGraw Hill LLC. All Rights Reserved. Terms of Usearrow_forwardWhy is analysing salt content (using Mohr titration) in both regular & salt reduced tomato sauce important?arrow_forwardIn the image below, correctly name the glassware # _P ( Blank 1) and T ( Blank 2). 景 A W Blank # 1 Blank #2 1000 +19 E E D 0 0-0 G H A A K Π 12 R M N S 0-0-arrow_forward
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