Molecule X undergoes the photophysical processes listed below. Name each process (1) - (5) and represent them on a Jablonski diagram. So +hv → S, (1) →S, +hv (2) S - →T, +A (3) & »S, +hv (4) T - →S, +A (5)
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- (b) Molecule X undergoes the photophysical processes listed below. Name each process (1) - (5) and represent them on a Jablonski diagram. So +hv → S, (1) S >S, +hv (2) S, – >T; + A (3) T →S, +hv (4) k4 T,- > S, + A (5)Chemistry Arrange the following reactions in order of increasing DSrxn values--without any data besides the reactions. Briefly explain the reasoning behind the ordering of reactions. (a) N2 (g) + 3 H2 (g) --> 2 NH3 (g) (b) H2 (g) + I2 (g) --> 2 HI (g) (c) CO (g) + 2 H2 (g) --> CH3OH (l) (d) CH3OH (g) --> CO (g) + 2 H2 (g) (e) 2 H2 (g) + O2 (g) ® 2 H2O (g)5. Hence show that: OU (hv exp(-ẞhv)) hv exp(-2ẞhv) =-3Nhv + oß (1-exp(-ßhv)) (1-exp(-ẞhv)) Hint 1: you will need to use the quotient rule: yf'(x) xf'(y) f'(x) f'(y) (f'(y))² (f'(y))² Hint 2: the following identity will avoid you having to use the chain rule: d (1 − e√(x)) = − f'(x)e√(x) dx
- Calculate AS°; for the following compounds in J mol1 K-1. C2H4(g) AS°f= i J mol1 K1 HC2H3O2(1) AS°f = i J mol1 K1 CaSO4•2H2O(s) AS°f = i J mol1 K1Period # of Electrons Boiling Point Group Compound -162°C CH, -112°C SiH, 14 GeH, -90°C -50°C SnH, -33°C NH, PH, -87°C -60°C AsH, -25°C SbH, H,O 100°C H,S -65°C 16 H,Se -45°C H,Te -15°C HF 20°C HCl -85°C 17 HBr -69°C HI -35°C 15List the HOMO and LUMO for each of the following molecules. Please choose from one of these options for each assignment: nonbonding, o,o*,π, or T*. It's not necessary in this question to specify the specific atoms involved. (a) H3C. H₂C-N H3C CH3 HOMO: LUMO: (b) HOMO: LUMO:
- A student is interpretting Organic Chemical heiroglyphics and decides that the molecule must be “1,1-dimethylsomethingsomething”. Ignoring how clearly wrong the second part is, is “1,1-dimethyl” valid and, if not, why does it not work?будо (H) Ӧ. COOH (1) SOCl2 (2) NaN3, -20°С (3) PhH, 80ºc (4) HCl, H2O, 100°С н но д OHAccording to the conventions above, what is the sign ( + or ) of the P.E. change (H) for Rxn 3?
- 5. What are the spin system of the following compounds: (a) Cl₂CHCH2CHC₁₂ (b) CF3C=C-H (c) CI- H H H H -Br (d) H3C H CH3SE TF- R SF SF 0-R R-1-C (a) (b) (c) 5-1 For each of the following bond graphs, assign causality, predict the number of state variables, and write a set of state questions. All elements may be assumed to be linear with constant coefficients.7. Consider the C=O stretching data for the following cyclic ketones: cyclopropane 1813 cm³¹; cyclobutanone 1791 cm³¹; cyclopentanone 1740 cm³¹. (a) which ketone has the strongest bond? (b) where in the trend would you expect the C=O stretch of cyclopropenone? (Use the hybridization information in the same way we used hybridization for C-H stretching.)