5. Look at this figure from Blankenship's book, Molecular Mechanisms of Photosynthesis. You can see the structure for bacteriochlorophyll a, along with its absorption spectrum. a. What is the molecular shape around the labeled carbon atom? b. What is the hybridization around that same carbon? Based on this structure, would you expect this molecule to absorb light in the visible spectrum? Why or why not? C.

5. Look at this figure from Blankenship's book, Molecular Mechanisms of Photosynthesis. You can see the structure for bacteriochlorophyll a, along with its absorption spectrum. a. What is the molecular shape around the labeled carbon atom? b. What is the hybridization around that same carbon? Based on this structure, would you expect this molecule to absorb light in the visible spectrum? Why or why not? C.

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions

Section: Chapter Questions

Problem 20.25P

See similar textbooks

Similar questions

I don't know how to solve the problem attached to the file below.
Please create a caption for this table. Solution NaCl Conc. (%) Osmolality (mOsm) % transmittance Absorbance % hemolysis % crenation C distilled 0 0 0.001029 4.987584625 100 0.03354 1 0.177179111 54.61 0.001551 4.809388202 96.42720001 0.05837 2 0.297126222 91.58 0.01012 3.994819487 80.09527231 0.08444 3 0.442542222 136.4 3.849 1.414652089 28.3634704 0.134 4 0.590164444 181.9 64.8 0.188424994 3.777880643 0.2125 5 0.74752 230.4 95.64 0.019360433 0.388172513 0.3368 6 0.89644 276.3 99.56 0.001915112 0.038397585 0.5336 7 1.095648889 337.7 99.98 8.68676E-05 0.001741676 0.9834 8 1.336711111 412 100 0 0 2.1 9 1.755568889 541.1 100 0 0 7.9 10 2.674395556 824.3 100 0 0 57.83 11 4.490211111 1384 100 0 0 99.72
Xanthurenic acid stock solution Absorbance 25 0.052 50 0.128 75 0.202 100 0.310 150 0.448 200 0.621 Plot a graph, from graph, y=mx (force the trend line to pass through origin since the blank with no xanthurenic acid was set to be zero absorbance) in which, y: Absorbance, x concentration
What is the difference between optical activity/polarimetry vs. (R)/(S) configurations? (+) seems to be clockwise, while (-) seems to be counterclockwise. (R) seems to be clockwise when the lowest priority group is facing the back, while (S) seems to be counterclockwise. Does (R) match up with (+) and (S) match up with (-)? If not, what is the difference? Is it that (R) and (S) are just how we determine the priorities in space while (+) and (-) can be determined via labaratory experiments? How can (R)(-) or (S)(+) exist then? Would this show that the spatial arrangement is incorrect in comparison with what the polarimeter shows?
Identify the Brassicasterol peak of the GC-MS of Burn Morel mushrooms (Tomentosa) and the M (+/-) peaks that are present. Include the mass and signature intensities of the peaks main product.
The Rf of the major compound in the TLC shown below is
. Dilute alcohol shows sharp stretch for OH group while neat alcohol shows broad OH stretch band.
The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A hydrocarbon exhibits no bands above 3000 but gives weak absorption at 2200 cm-1.Relative absorption intensity: (s)=strong, (m)=medium, (w)=weak. What functional class(es) does the compound belong to? List only classes for which evidence is given here. Attach no significance to evidence not cited explicitly.Do not over-interpret exact absorption band positions. None of your inferences should depend on small differences like 10 to 20 cm-1. The functional class(es) of this compound is(are)fill in the blank 1.(Enter letters from the table below, in any order, with no spaces or commas.) a. alkane (List only if no other functional class applies.) b. alkene h. amine c. terminal alkyne i. aldehyde or ketone d. internal alkyne j. carboxylic acid e. arene k. ester f. alcohol l. nitrile g. ether
Given the information listed below, identify the compound. Physical description: This substance is a colorless but fragrant liquid that is oily in appearance. Chemical information: Observed Melting point: -78.5 °C Observed Boiling point: 138-142 °C Calculated MW: 130 g/mol Density: 0.876 g/cm3 Solubility in water: Minimally soluble, Other: Flash Point: 77 °F Spectroscopic information: IR bands indicate this compound contains C-H functionalities and the appearance of a strong stretch near 1700 cm-1 as well as several strong bands between 1500 and 1000 cm-1. The C-13 NMR spectrum for this compound indicates 6 unique carbon atoms and no cyclic structure. The proton NMR data indicate 5 sets of unique protons. C-13 NMR data of : PPM: 171.08, 63.13, 37.48, 25.18, 22.51, 20.96 Int: 222, 887, 645, 635, 1000, 473 Assign: 1, 2, 3, 4, 5, 6 H-1 NMR Assign: A, B, C, D, E Shift: 4.095, 2.037, 1.693, 1.521, 0.926
Which combination cannot be used as mobile phase in RPLC? A. Water-acetonitrile B. Acetonitrile-cyclopentane C. water-THF (tetrahydrofuran) D. Acetonitrile-THF (tetrahydrofuran)
The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A compound containing no nitrogen exhibits strong, broad absorption across the 2500-3300 cm-1 region, accompanied by 2200 (w) and 1715 (s) cm-1bands.Relative absorption intensity: (s)=strong, (m)=medium, (w)=weak. What functional class(es) does the compound belong to? List only classes for which evidence is given here. Attach no significance to evidence not cited explicitly.Do not over-interpret exact absorption band positions. None of your inferences should depend on small differences like 10 to 20 cm-1. The functional class(es) of this compound is(are)fill in the blank 1.(Enter letters from the table below, in any order, with no spaces or commas.) a. alkane (List only if no other functional class applies.) b. alkene h. amine c. terminal alkyne i. aldehyde or ketone d. internal alkyne j. carboxylic acid e. arene k. ester f. alcohol l. nitrile g. ether
Which combination cannot be used as mobile phase in RPLC? A. Acetonitrile-cyclopentane B. Water-acetonitrile C. Acetonitrile-THF D. Water-THF