16. Which of the following compounds has the longest Imax (smallest HOMO LUMO gap)?
Question 9 Which of the following compounds has the longest Imax? COTO III IV V OI N O II O III IV
Which of the following compounds would show the Imax of longest wavelength in its UV-Vis spectrum?
Cyclobutadiene is an anti-aromatic molecule. What was your calculated HOMO-LUMO gap for cyclobutadiene? Would you expect this molecule to be paramagnetic or diamagnetic based on the calculated gap? The HOMO-LUMO gap I got using Webmo was 0.012 eV. 2. 11-cis-retinal plays a role in our vision. When an electron gets promoted it becomes easier to the cis-bond to rotate to the trans-isomer. What color light causes the promotion of an electron from the HOMO-LUMO for that molecule? 3. Pentacene has...
Report the HOMO/LUMO energy gap for each molecule. Calculate the corresponding wavelength for each energy difference. Arrange the dye molecules in order of increasing wavelength. Does this trend agree with the trend observed in Part 3 of this lab? What is the HOMO/LUMO gap dependent on ? Data and Results 1,1'-diethyl-4,4'-cyanine iodide 1,1'-diethyl-4,4'-carbocyanine iodide 1,1'-diethyl-4,4'-dicarbocyanine iodide HOMO (eV) -9.813 -9.133 -8.766 LUMO (eV) -2.339 -2.236 -2.189 respectively
14. Predict the major product of the following reaction? 15. Predict the major product of the following reaction? " " " " 16. Which of the following compounds has the longest (smallest HOMO LUMO gap)? 17. Predict the major product of the following reaction? 18. How many signals would you expect in "C NMR spectrum of the following compound? 1 و ا م
What does a small homo-lumo gap of transitonmetal have to do with its catalytic reactivity?
I just need help understanding question 4 and how structure affects homo-lumo gap. Dye - 1B 16 TT A T 28 2C Color Yollow Yellow ced Rod 476.35 Rod | 473.9 Rod | 461.77 Yollow 39.5 Amar (nm) 407.55 | 395.45 b. (0.5 points) How different are the colors of dyes 1A and 1B? (circle one) The same slightly different very different C. (0.5 points) How different are the colors of dyes 1A and 2A? (circle one) The same slightly...
Which of these compounds exhibits the longest wavelength Imax in the UV-vis spectrum? O A. OB. OC. What is the major product of this reaction? 1 equiv. HBr -80°C Br لد A. Br B. OC. Br Br OD. Rank these conformations from least to most stable (less stable < more stable). H Cl CI CH3 H CH3 Н H CH3 CH CI H CH 3 H CH 3 3 H H H - 11 A. II < III < B....
Give the product of the following reaction: Draw the HOMO of butadiene and the LUMO of ethene (ethylene); include orbital phases. An unknown starting material underwent an S_n^2 reaction with NaBr to give the following products. Based on the mass spectrum below, what is the unknown starting material? (1)
QUESTION 16 Which hydrogen would be removed in an E2 reaction? нь На . HC Hd о На о нь Не Hd QUESTION 17 QUESTION 17 Which compound has the highest lambda max (or the smallest HOMO-LUMO gap) in the UV-vis spectrum? 11 III IV 0 0 0 0 IV QUESTION 18 How many aldol products could result from the following reaction? Til NaOH heat 2 0 0 0 0 3 QUESTION 19 QUESTION 19 Which type of atom is...