Homework Answers
Answer is third option, Cd(II)
In a complex, the colour of the ions is mainly depends upon the electronic transitions. If the electronic transition does not occur, the ion appears colourless when placed in an octahedral crystal field.
The ion which has filled d-orbitals is colourless because the d-d transition does not occur.
Cd(II) is colorless when placed in octahedral crystal field, because the d-orbitals are completely filled and hence d-d transition does not occur.
Cu(II) - 3d 9
Cr(III) -3d 3
Cd(II) - 3d10 ( completely filled d-orbitals, hence d-d transition does not occur)
Co(III) - 3d 6
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Question 2 (4 points) Based on simple crystal field theory, which of the following metal ions...
From the following list of metal ions and ligands, construct metal complexes with properties which match...
From the following list of metal ions and ligands, construct metal complexes with properties which match that described in each part of the question and provide a brief explanation. (Only one example is required for each part of the question, e.g. [Fe(H20)6]21). Metal ions Ligands (in order of increasing ligand field strength) [ < Br< <C1° <NO3 <OH <ox?- <H2O< Ti(IV), V(III), V(IV), Cr(II), Cr(III), Mn(II), NH3 <en <bpy < PPh3< CN=CO Mn(III), Mn(IV), Fe(II), Fe(III), Co(II), Co(III), en =...
1. What distinguish a transition metal from a main group metal? 2. Why is zinc not...
1. What distinguish a transition metal from a main group metal? 2. Why is zinc not considered a transition metal? 3. Write the electronic configuration of the following ions; V". Cr, Mn, Fe, Ni, Ti" 4. What are basic assumptions of Crystal Field Theory? 5. Compounds containing the Scion are colorless whereas those containing Ti* ion are colored. Explain. 6. Predict the number of unpaired electrons in [Cr(en) ions. 7. What are spectrochemical series? 8. The compound hexaminecobalt(III) chloride is...
2. a. Draw and show the crystal field splitting of the d orbitals in an octahedral...
2. a. Draw and show the crystal field splitting of the d orbitals in an octahedral complex, a tetrahedral complex, and in a square planar complex.(clearly label the orbitals) b. Explain the difference in the following crystal field splitting values (1) Co(NH3).]2+ 10200 cm"! : [CO(NH3).]* 22,900 cm (ii) [Cr(H20).]** 17,400 cm. ; [Cr(CN).]3-26,600 cm (iii) [MnF6]?- 22,200 cm-"; [ReF.]?- 27,800 cm- (iv) [Co(NH3).]2+ 10,200 cm '; [Co(NH3)4]2+ 5,900 cm c. Draw and show the filling of 6 d electrons...
Question 5 1) In the crystal structure of CuF, the Cu2+ ion is six coordinate with four F ions at...
Question 5 1) In the crystal structure of CuF, the Cu2+ ion is six coordinate with four F ions at a distance of 1.93 A and two F ions at a distance of 2.27A. Explain. 2) Which of the following ligands F, CN, H20 and NO2 will form significantlhy distorted octahedral complexes with cobalt (II)? Explain 3) Which of the following octahedral complexes are expected to show very weak tetragonal distortion and why? (a) [Cr(CDl (b) [Mn(H20) (c)Cr(Ho and [Ti(H20...
1. Answer all parts to this question. From the following list of metal ions and ligands,...
1. Answer all parts to this question. From the following list of metal ions and ligands, construct metal complexes with properties which match that described in each part of the question and provide a brief explanation (Only one example is required for each part of the question, eg [Fe(H:01) Metal ions Ligands in order of increasing ligand field strength) I <Br <C<NO, <OHOXH.0 Ti(IV), V(III), V(IV), CHIT), CHIIT), Min(II). NH<em<bry<PPh<N =CÓ Mn(III). Mn(IV), Fe(II) Fe(III). CoII), COIIT) en = ethylenediamine...
Which one of the following octahedral complex ions is diamagnetic? Note: NH3 is a strong-field ligand....
Which one of the following octahedral complex ions is diamagnetic? Note: NH3 is a strong-field ligand. (a) [Fe(NH3)6] 3+ (b) [Fe(NH3)6] 2+ (c) [Cr(NH3)6] 3+ (d) [Cr(NH3)6] 2+ (e) [Co(NH3)6] 2+
Q1. The following species a)-c) all contain complex ions of transition metals, which you can assume...
Q1. The following species a)-c) all contain complex ions of transition metals, which you can assume take up an octahedral geometry. a) [RuCl3(H2O)3] b) [Ir(bpy)3]Cl3 ; bipy = 2,2'-bipyridine c) K2[Mo(NCS)6] For each species: i) draw all the possible isomers of the complex ions; ii) calculate the charge of the metal, and the dn configuration; iii) draw a diagram showing d orbital occupancy and, where high and low spin cases are possible, predict which will be favoured considering the spectrochemical...
1. What is the crystal field stabilisation energy (CFSE) of a d5 metal ion in an...
1. What is the crystal field stabilisation energy (CFSE) of a d5 metal ion in an octahedral ligand field surrounded by weak field ligands? +5Dq -20Dq 0Dq -5Dq -20Dq + P 2. The relative ordering of the d orbital energy levels for a complex such as [Cu(H2O)6]2+ which exhibits tetragonal elongation due to the Jahn-Teller Effect is: Group of answer choices xz = yz = xy < x2-y2 = z2 xy < xz = yz < x2-y2 < z2 xz...
Date: 1117 mework 10 - Ch. 21-23 A) CN B)NO c)r D) CO Name: E ) en 24. Place the ligands, CN-, Br., H2O, and OH-in o...
Date: 1117 mework 10 - Ch. 21-23 A) CN B)NO c)r D) CO Name: E ) en 24. Place the ligands, CN-, Br., H2O, and OH-in order from least to greatest according ability to split the d orbital energy level. A) CN-, OH, H2O, Br- C) Br,H20, CN-, OH- B) Br., OH, H2O, CN- D) None of the above 25. The charge on the central metal ion in (Cr(NH3)(CO3)2+ is A)-1. B) 0. C) 1. D) 3. E) 5 26....
Which dorbital configuration has the highest crystal field stabilization energy (CFSE) in a low spin octahedral...
Which dorbital configuration has the highest crystal field stabilization energy (CFSE) in a low spin octahedral crystal field? d4 d3 d6 ОООО g8 d? Predic whether the following complex is diamagnetic or paramagentic. 72+ paramagnetic need more information to answer this question diamagnetic The magnetic property of a transition metal complex can be predicted using crystal field theory. If we assume that the magnetic moment arises entirely from unpaired electron spins then the "spin only magnetic moment (us) is given...
From the following list of metal ions and ligands, construct metal complexes with properties which match that described in each part of the question and provide a brief explanation. (Only one example is required for each part of the question, e.g. [Fe(H20)6]21). Metal ions Ligands (in order of increasing ligand field strength) [ < Br< <C1° <NO3 <OH <ox?- <H2O< Ti(IV), V(III), V(IV), Cr(II), Cr(III), Mn(II), NH3 <en <bpy < PPh3< CN=CO Mn(III), Mn(IV), Fe(II), Fe(III), Co(II), Co(III), en =...
1. What distinguish a transition metal from a main group metal? 2. Why is zinc not considered a transition metal? 3. Write the electronic configuration of the following ions; V". Cr, Mn, Fe, Ni, Ti" 4. What are basic assumptions of Crystal Field Theory? 5. Compounds containing the Scion are colorless whereas those containing Ti* ion are colored. Explain. 6. Predict the number of unpaired electrons in [Cr(en) ions. 7. What are spectrochemical series? 8. The compound hexaminecobalt(III) chloride is...
2. a. Draw and show the crystal field splitting of the d orbitals in an octahedral complex, a tetrahedral complex, and in a square planar complex.(clearly label the orbitals) b. Explain the difference in the following crystal field splitting values (1) Co(NH3).]2+ 10200 cm"! : [CO(NH3).]* 22,900 cm (ii) [Cr(H20).]** 17,400 cm. ; [Cr(CN).]3-26,600 cm (iii) [MnF6]?- 22,200 cm-"; [ReF.]?- 27,800 cm- (iv) [Co(NH3).]2+ 10,200 cm '; [Co(NH3)4]2+ 5,900 cm c. Draw and show the filling of 6 d electrons...
Question 5 1) In the crystal structure of CuF, the Cu2+ ion is six coordinate with four F ions at a distance of 1.93 A and two F ions at a distance of 2.27A. Explain. 2) Which of the following ligands F, CN, H20 and NO2 will form significantlhy distorted octahedral complexes with cobalt (II)? Explain 3) Which of the following octahedral complexes are expected to show very weak tetragonal distortion and why? (a) [Cr(CDl (b) [Mn(H20) (c)Cr(Ho and [Ti(H20...
1. Answer all parts to this question. From the following list of metal ions and ligands, construct metal complexes with properties which match that described in each part of the question and provide a brief explanation (Only one example is required for each part of the question, eg [Fe(H:01) Metal ions Ligands in order of increasing ligand field strength) I <Br <C<NO, <OHOXH.0 Ti(IV), V(III), V(IV), CHIT), CHIIT), Min(II). NH<em<bry<PPh<N =CÓ Mn(III). Mn(IV), Fe(II) Fe(III). CoII), COIIT) en = ethylenediamine...
Date: 1117 mework 10 - Ch. 21-23 A) CN B)NO c)r D) CO Name: E ) en 24. Place the ligands, CN-, Br., H2O, and OH-in order from least to greatest according ability to split the d orbital energy level. A) CN-, OH, H2O, Br- C) Br,H20, CN-, OH- B) Br., OH, H2O, CN- D) None of the above 25. The charge on the central metal ion in (Cr(NH3)(CO3)2+ is A)-1. B) 0. C) 1. D) 3. E) 5 26....
Which dorbital configuration has the highest crystal field stabilization energy (CFSE) in a low spin octahedral crystal field? d4 d3 d6 ОООО g8 d? Predic whether the following complex is diamagnetic or paramagentic. 72+ paramagnetic need more information to answer this question diamagnetic The magnetic property of a transition metal complex can be predicted using crystal field theory. If we assume that the magnetic moment arises entirely from unpaired electron spins then the "spin only magnetic moment (us) is given...
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