2. The [Ni(en)]+ complex contains the bidentate ligand ethylenediamine (en), HNCHCHNH2. (a) Chelating ligands are commonly...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
2. The [Ni(en)]²+ complex contains the bidentate ligand ethylenediamine (en), H₂NCH₂CH₂NH2. (a) Chelating ligands are commonly used in inorganic chemistry, including trace metal detection. (i) Explain the meaning of the term "chelating ligand". (ii) Explain the term "chelate effect". [2 marks] [3 marks] (iii) Explain the origin of the chelate effect by reference to the following reaction, with equilibrium constant K = 109.7 at 298 K. Calculate the change in Gibbs free energy during this reaction [Ni(NH3)]2+ (aq) + 3en(aq) = [Ni(en)]2+ (aq) + 6NH³(aq) [4 marks] (b) Crystal field effects play a key role in the stability and physical properties of transition-metal complexes. (i) Determine the oxidation state and d electron count of nickel in [Ni(en)]²+. [2 marks] (ii) Sketch the crystal field splitting diagram for the nickel ion in [Ni(en)]²+ and calculate the crystal field stabilisation energy in terms of Ao and P. [6 marks] (iii) Given they adopt the same coordination geometry why does [Ni(en)]²+ have higher energy d-d transitions than [Ni(acac)2(H₂O)2]? ("acac" refers to the bidentate ligand acetylacetonate, (CH3COCHCOCH3)'"). [3 marks] 2. The [Ni(en)]²+ complex contains the bidentate ligand ethylenediamine (en), H₂NCH₂CH₂NH2. (a) Chelating ligands are commonly used in inorganic chemistry, including trace metal detection. (i) Explain the meaning of the term "chelating ligand". (ii) Explain the term "chelate effect". [2 marks] [3 marks] (iii) Explain the origin of the chelate effect by reference to the following reaction, with equilibrium constant K = 109.7 at 298 K. Calculate the change in Gibbs free energy during this reaction [Ni(NH3)]2+ (aq) + 3en(aq) = [Ni(en)]2+ (aq) + 6NH³(aq) [4 marks] (b) Crystal field effects play a key role in the stability and physical properties of transition-metal complexes. (i) Determine the oxidation state and d electron count of nickel in [Ni(en)]²+. [2 marks] (ii) Sketch the crystal field splitting diagram for the nickel ion in [Ni(en)]²+ and calculate the crystal field stabilisation energy in terms of Ao and P. [6 marks] (iii) Given they adopt the same coordination geometry why does [Ni(en)]²+ have higher energy d-d transitions than [Ni(acac)2(H₂O)2]? ("acac" refers to the bidentate ligand acetylacetonate, (CH3COCHCOCH3)'"). [3 marks]
Expert Answer:
Related Book For
Posted Date:
Students also viewed these medical sciences questions
-
Explain the meaning of the term "non-financial liabilities" as it is used in IFRS.
-
Explain the meaning of the term double taxation as it applies to corporate profits.
-
Explain the meaning of the term documentation as it pertains to computers and an information systems department. How might a clients documentation be used by the auditors?
-
Find the dy/dx for the following 3 2x+1.2x+1 (x +1)4 1- y=-
-
Holding down operating costs is an ongoing challenge for managers. The lower the costs that a company incurs, the higher its profit will be. But two factors can make a target profit difficult to...
-
What is the importance of acetylcholinesterase in muscle cell contraction?
-
From the following accounts of Kurlz Salon, Inc., prepare the businesss statement of retained earnings for the year ended December 31, 2010: Retained Earnings Dividends Clo 95,000 Jan 1 188,000 Mar...
-
Amortization of Intangibles For each of the following intangible assets , indicate the amount of amortization expense that should be recorded for the year 2010 and the amount of accumulated...
-
The Riteway Ad Agency provides cars for its sales staff. In the past, the company has always purchased its cars from a dealer and then sold the cars after three years of use. The company's present...
-
As the newest BFM in the program office, you notice a disbursement for the X-86 Aircraft landing tail hook in the accounting system. You then notice that the disbursement is not matched to an...
-
It has been said that businesses and their attendant supply chains have become "too lean". Discuss this statement, using appropriate supply chain concepts to support your answer.
-
What are the factors that contribute to communication problems between men and women?
-
What are the dimensions of cross-cultural communication and how does it influence the effectiveness of cross-cultural communication?
-
Explain how the rational decision-making process works.
-
Distinguish between the various pay plans used to motivate teamwork. What are the advantages and disadvantages of them?
-
Will your new and improved civil service system require a revised hiring strategy? What changes in hiring will have to take place?
-
What is the p H of a solution of 0 . 0 2 M of N a 2 H P O 4 ? The stepwise dissociation of What is the pH of a solution of 0 . 0 2 M of N a 2 H P O 4 ? The stepwise dissociation of H 3 P O 4 ( a q )...
-
Solve for the equilibria of the following discrete-time dynamical systems Pr pt+1 = Pr+2.0(I-Pr)
-
Choose the substance with the larger positional probability in each case. a. 1 mole of H2 (at STP) or 1 mole of H2 (at 100oC, 0.5 atm) b. 1 mole of N2 (at STP) or 1 mole of N2 (at 100 K, 2.0 atm) c....
-
Give formulas for the following. a. Potassium terrachlorocobaltate(II) b. Aquatricarbonylplatinum(II) bromide c. Sodium dicyanobis(oxalato)ferrate(DI) d. Triamminechloroethylenediaminechromium(III)...
-
Using appropriate reactants, alcohols can be oxidized into aldehydes, ketones, and/or carboxylic acids. Primary alcohols can be oxidized into aldehydes, which can then be oxidized into carboxylic...
-
If the resultant of forces acting on a body does not pass through the centre of mass, then the inertia force and inertia couple is replaced by (a) Equivalent inertia force (b) equivalent inertia...
-
What is inertia force?
-
A slider crank mechanism is loaded as shown in Fig. \(11.35 . A B=400 \mathrm{~mm}, B C=600 \mathrm{~mm}, A D=200\) \(\mathrm{mm}, C E=300 \mathrm{~mm}\). Calculate the input torque for the static...
Study smarter with the SolutionInn App