43.2 4G 3G 8:51 AM O OT 91 K/S 1 k stream.massey.ac.nz BOTTEG... Assess... Untitled... fn Final ex... [Brand n... 250,000... Shoulde... Good co... Question 2 Not yet answered Marked out of 1.00 Flag question A pioneering article on coordination chemistry from 1951 describes the coordination chemistry of various ligands and gold(III). Draw on your knowledge of coordination numbers, coordination geometries, d electron counts and ligand field stabilization energy to answer the following questions. (a) [5 marks] H[AUCI] and [AUCI4] are used as starting materials. Draw these compounds and state their coordination numbers. (b) [5 marks] A yellow solid was obtained from the reaction of 1,2-diaminoethane (en) with K[AuCl 4]. It was stated that the "solid is diamagnetic and therefore is not a compound of Au(II)." Explain how the authors arrived at this conclusion. (c) [5 marks] Given that the product in (b) has an Au:en ratio of 1:2 and no redox processes are involved, draw its structure. State the geometry at the metal centre and justify your choice. (d) [5 marks] In another reaction, H[AUCI4] and 2,2'-bipyridine (bipy) produced diamagnetic [AuCl2(bipy)]*. However, the authors state that "We did not succeed in obtaining compounds with more than one 2,2'-bipyridine molecule per gold atom." Discuss the reason(s) for this Share ||| = Lens S 8:52 AM OT OT 20.5 4G 3G K/S 1 91 k [Brand n... 250,000... Shoulde... stream.massey.ac.nz Good co... I BOTTEG... Assess... Untitled... Final ex... draw its structure. State the geometry at the metal centre and justify your choice. (d) [5 marks] In another reaction, H[AuC] and 2,2'-bipyridine (bipy) produced diamagnetic [AuCl₂(bipy)]*. However, the authors state that "We did not succeed in obtaining compounds with more than one 2,2'-bipyridine molecule per gold atom." Discuss the reason(s) for this observation. (e) [5 marks] The authors did not use circular dichroism (CD) spectroscopy to characterise [AuCl2(bipy)]+. Was this an oversight or was there a valid reason? I have answered this question I have not answered this question Previous page Quiz navigation i 1 2 3 4 5 Finish attempt... Share ||| = Lens S Next page

43.2 4G 3G 8:51 AM O OT 91 K/S 1 k stream.massey.ac.nz BOTTEG... Assess... Untitled... fn Final ex... [Brand n... 250,000... Shoulde... Good co... Question 2 Not yet answered Marked out of 1.00 Flag question A pioneering article on coordination chemistry from 1951 describes the coordination chemistry of various ligands and gold(III). Draw on your knowledge of coordination numbers, coordination geometries, d electron counts and ligand field stabilization energy to answer the following questions. (a) [5 marks] H[AUCI] and [AUCI4] are used as starting materials. Draw these compounds and state their coordination numbers. (b) [5 marks] A yellow solid was obtained from the reaction of 1,2-diaminoethane (en) with K[AuCl 4]. It was stated that the "solid is diamagnetic and therefore is not a compound of Au(II)." Explain how the authors arrived at this conclusion. (c) [5 marks] Given that the product in (b) has an Au:en ratio of 1:2 and no redox processes are involved, draw its structure. State the geometry at the metal centre and justify your choice. (d) [5 marks] In another reaction, H[AUCI4] and 2,2'-bipyridine (bipy) produced diamagnetic [AuCl2(bipy)]. However, the authors state that "We did not succeed in obtaining compounds with more than one 2,2'-bipyridine molecule per gold atom." Discuss the reason(s) for this Share ||| = Lens S 8:52 AM OT OT 20.5 4G 3G K/S 1 91 k [Brand n... 250,000... Shoulde... stream.massey.ac.nz Good co... I BOTTEG... Assess... Untitled... Final ex... draw its structure. State the geometry at the metal centre and justify your choice. (d) [5 marks] In another reaction, H[AuC] and 2,2'-bipyridine (bipy) produced diamagnetic [AuCl₂(bipy)]. However, the authors state that "We did not succeed in obtaining compounds with more than one 2,2'-bipyridine molecule per gold atom." Discuss the reason(s) for this observation. (e) [5 marks] The authors did not use circular dichroism (CD) spectroscopy to characterise [AuCl2(bipy)]+. Was this an oversight or was there a valid reason? I have answered this question I have not answered this question Previous page Quiz navigation i 1 2 3 4 5 Finish attempt... Share ||| = Lens S Next page

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter26: Molecular Absorption Spectrometry

Section: Chapter Questions

Problem 26.30QAP

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Transcribed Image Text:43.2 4G 3G 8:51 AM O OT 91 K/S 1 k stream.massey.ac.nz BOTTEG... Assess... Untitled... fn Final ex... [Brand n... 250,000... Shoulde... Good co... Question 2 Not yet answered Marked out of 1.00 Flag question A pioneering article on coordination chemistry from 1951 describes the coordination chemistry of various ligands and gold(III). Draw on your knowledge of coordination numbers, coordination geometries, d electron counts and ligand field stabilization energy to answer the following questions. (a) [5 marks] H[AUCI] and [AUCI4] are used as starting materials. Draw these compounds and state their coordination numbers. (b) [5 marks] A yellow solid was obtained from the reaction of 1,2-diaminoethane (en) with K[AuCl 4]. It was stated that the "solid is diamagnetic and therefore is not a compound of Au(II)." Explain how the authors arrived at this conclusion. (c) [5 marks] Given that the product in (b) has an Au:en ratio of 1:2 and no redox processes are involved, draw its structure. State the geometry at the metal centre and justify your choice. (d) [5 marks] In another reaction, H[AUCI4] and 2,2'-bipyridine (bipy) produced diamagnetic [AuCl2(bipy)]*. However, the authors state that "We did not succeed in obtaining compounds with more than one 2,2'-bipyridine molecule per gold atom." Discuss the reason(s) for this Share ||| = Lens S

Transcribed Image Text:8:52 AM OT OT 20.5 4G 3G K/S 1 91 k [Brand n... 250,000... Shoulde... stream.massey.ac.nz Good co... I BOTTEG... Assess... Untitled... Final ex... draw its structure. State the geometry at the metal centre and justify your choice. (d) [5 marks] In another reaction, H[AuC] and 2,2'-bipyridine (bipy) produced diamagnetic [AuCl₂(bipy)]*. However, the authors state that "We did not succeed in obtaining compounds with more than one 2,2'-bipyridine molecule per gold atom." Discuss the reason(s) for this observation. (e) [5 marks] The authors did not use circular dichroism (CD) spectroscopy to characterise [AuCl2(bipy)]+. Was this an oversight or was there a valid reason? I have answered this question I have not answered this question Previous page Quiz navigation i 1 2 3 4 5 Finish attempt... Share ||| = Lens S Next page

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