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Two complex ions exhibit the following absorption maxima Complex A, 701 nm Complex B, 415 nm...
An octahedral metal complex absorbs light with wavelength 580 nm. a. What is the crystal field...
An octahedral metal complex absorbs light with wavelength 580 nm. a. What is the crystal field splitting A, in kJ/mol for the complex? (Hint: Energy is based on wavelength of light absorbed. See data sheet.) (3 marks) b. What color does the complex appear to the eye? (2 marks) 750 nm, 400 nm Red Violet 630 nm 430 nm Blue Orange 590 nm 480 nm Yellow Green 560 nm
(a) A spectrum of colours has the following wavelengths: violet, 415 nm: blue, 475nm. green 517...
(a) A spectrum of colours has the following wavelengths: violet, 415 nm: blue, 475nm. green 517 nm; yellow 575 mm; orange 620 nm; and red, 680 nm. Determine the frequencies of (i) green and (ii) red light (the speed of light = 3.00 x 10^8 m/s) (b) Calculate the energy of photons corresponding to (i) violet and (ii) orange light (Planck's constant is 6.63 x 10^-34 Js) (c) Ignoring curvature, calculate the angle of refraction for a light ray with...
The electronic absorption spectrum UI (Cr(NH3)6]3+ (aq) is shown in Figure 11.5. One of the...
The electronic absorption spectrum UI (Cr(NH3)6]3+ (aq) is shown in Figure 11.5. One of the observed peaks is centered at about 303 nm. 1.a. What is the approximate value of the wavelength for the two other peaks? Which one of these three peaks falls in the visible region of the electromagnetic spectrum? The wavelength at this peak is (Amax), and this transition accounts for the color of the complex ion in solution. The energy of the transition occurring at...
1. In testing the stabilities of complex ions of Ni2+, the following steps are performed. 2...
1. In testing the stabilities of complex ions of Ni2+, the following steps are performed. 2 mL of NH3(aq) are added to 2 mL 0.1 M Ni(NO3)2(aq), which contains [Ni(H2O)]2+. The green solution turns to a deep blue solution. Addition of 2 ml of 1 M NaOH(aq) to this blue solution results in the formation of a green precipitate. By using the treatment of the copper complexes in the introduction as a guide, answer the following questions: a. What is...
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...
Can you do Q6? EXERCISES 153 Woodward's rules, predict the absorption maximum for the 2-5 Using...
Can you do Q6?
EXERCISES 153 Woodward's rules, predict the absorption maximum for the 2-5 Using following compound: Ans: 349 nm 2-6 A 10- M solution of Cu(lI) in concentrated HCl is a pale green-blue. whereas Cu(II) in concentrated ammonia is an intense blue-violet color. (a) What is the mechanism of absorption which is responsible for cupric-ion solu- tions being colored? (b) Explain why ammonia gives Cu(II) solutions an intense blue-violet color whereas HCI imparts a pale green-blue color. (e)...
3. (7 points total) Hydrocarbon A, C10H14, has a UV absorption at Amax = 236 nm....
3. (7 points total) Hydrocarbon A, C10H14, has a UV absorption at Amax = 236 nm. Upon catalytic hydrogenation (H2, Pd/C), Hydrocarbon B, C10H18, is formed. Ozonolysis of A, followed by zinc/acetic acid treatment, yields the following diketo dialdehyde: a. (4 points) Propose two possible structures for hydrocarbon A: b. (3 points) Based on the UV data, which proposed structure for A is correct? Why? Justify your answer with Woodward-Fieser calculations.
20.38 (a) The values of Emer for the most intense absorptions in the electronic spectra of...
20.38 (a) The values of Emer for the most intense absorptions in the electronic spectra of CoCl4]- and (Co(OH).]2+ differ by a factor of about 100. Comment on this observation and state which complex you expect to exhibit the larger value of max- (b) In the electronic absorption spectrum of a solution containing V(OH))"+, two bands are observed at 17200 and 25 600 cm . No absorption for the A2, Tję(F) transition is observed. Suggest a reason for this, and...
1. Fill in the resistance values for the following color codes: a) blue gray red silver...
1. Fill in the resistance values for the following color codes: a) blue gray red silver b) yellow purple brown gold c) brown orange green gold d) white black orange gold e) green blue yellow silver f) red green black gold 2. Fill in the circle with the correct type of meter (V, A,2) a) b) c) 3. Which meter(s) will measure the total current in the circuit shown below? A C, D &E (circle correct answer) A & B...
can someone answer these please!! I NEED HELP!! Of the following events from the light reactions...
can someone answer these please!! I NEED HELP!!
Of the following events from the light reactions of photosynthesis, which would be expected to occur first? While being split, electrons are taken out of water. Acceptance of electrons by Pc from the cytochrome complex Donation of electrons from reduced Pq to the cytochrome complex Light-induced reduction of the primary elecetron acceptor in the reaction center of PS Il takes place. Question 2 (2 points) The following figure depicts the absorption spectra...
An octahedral metal complex absorbs light with wavelength 580 nm. a. What is the crystal field splitting A, in kJ/mol for the complex? (Hint: Energy is based on wavelength of light absorbed. See data sheet.) (3 marks) b. What color does the complex appear to the eye? (2 marks) 750 nm, 400 nm Red Violet 630 nm 430 nm Blue Orange 590 nm 480 nm Yellow Green 560 nm
(a) A spectrum of colours has the following wavelengths: violet, 415 nm: blue, 475nm. green 517 nm; yellow 575 mm; orange 620 nm; and red, 680 nm. Determine the frequencies of (i) green and (ii) red light (the speed of light = 3.00 x 10^8 m/s) (b) Calculate the energy of photons corresponding to (i) violet and (ii) orange light (Planck's constant is 6.63 x 10^-34 Js) (c) Ignoring curvature, calculate the angle of refraction for a light ray with...
The electronic absorption spectrum UI (Cr(NH3)6]3+ (aq) is shown in Figure 11.5. One of the observed peaks is centered at about 303 nm. 1.a. What is the approximate value of the wavelength for the two other peaks? Which one of these three peaks falls in the visible region of the electromagnetic spectrum? The wavelength at this peak is (Amax), and this transition accounts for the color of the complex ion in solution. The energy of the transition occurring at...
1. In testing the stabilities of complex ions of Ni2+, the following steps are performed. 2 mL of NH3(aq) are added to 2 mL 0.1 M Ni(NO3)2(aq), which contains [Ni(H2O)]2+. The green solution turns to a deep blue solution. Addition of 2 ml of 1 M NaOH(aq) to this blue solution results in the formation of a green precipitate. By using the treatment of the copper complexes in the introduction as a guide, answer the following questions: a. What is...
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...
Can you do Q6?
EXERCISES 153 Woodward's rules, predict the absorption maximum for the 2-5 Using following compound: Ans: 349 nm 2-6 A 10- M solution of Cu(lI) in concentrated HCl is a pale green-blue. whereas Cu(II) in concentrated ammonia is an intense blue-violet color. (a) What is the mechanism of absorption which is responsible for cupric-ion solu- tions being colored? (b) Explain why ammonia gives Cu(II) solutions an intense blue-violet color whereas HCI imparts a pale green-blue color. (e)...
3. (7 points total) Hydrocarbon A, C10H14, has a UV absorption at Amax = 236 nm. Upon catalytic hydrogenation (H2, Pd/C), Hydrocarbon B, C10H18, is formed. Ozonolysis of A, followed by zinc/acetic acid treatment, yields the following diketo dialdehyde: a. (4 points) Propose two possible structures for hydrocarbon A: b. (3 points) Based on the UV data, which proposed structure for A is correct? Why? Justify your answer with Woodward-Fieser calculations.
20.38 (a) The values of Emer for the most intense absorptions in the electronic spectra of CoCl4]- and (Co(OH).]2+ differ by a factor of about 100. Comment on this observation and state which complex you expect to exhibit the larger value of max- (b) In the electronic absorption spectrum of a solution containing V(OH))"+, two bands are observed at 17200 and 25 600 cm . No absorption for the A2, Tję(F) transition is observed. Suggest a reason for this, and...
1. Fill in the resistance values for the following color codes: a) blue gray red silver b) yellow purple brown gold c) brown orange green gold d) white black orange gold e) green blue yellow silver f) red green black gold 2. Fill in the circle with the correct type of meter (V, A,2) a) b) c) 3. Which meter(s) will measure the total current in the circuit shown below? A C, D &E (circle correct answer) A & B...
can someone answer these please!! I NEED HELP!!
Of the following events from the light reactions of photosynthesis, which would be expected to occur first? While being split, electrons are taken out of water. Acceptance of electrons by Pc from the cytochrome complex Donation of electrons from reduced Pq to the cytochrome complex Light-induced reduction of the primary elecetron acceptor in the reaction center of PS Il takes place. Question 2 (2 points) The following figure depicts the absorption spectra...
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