Q1 A dye molecule can exist in one of three forms, shown below. Which of the three has the largest Amax value?HOOCH 3HO.LOCH 3OCH 3O a. Form BOb. They are all the sameO c. Form Ad. Form CQUESTION 3HOOc. Five ¹H-NMR signals and six 13³C-NMR signalsd. Four ¹H-NMR signals and six 13C-NMR signalsOOHow many signals does the aldehyde (CH3)3CCH2CH₂CH₂CHO have in its ¹H-NMR and 13C-NMR spectra?Oa. Six ¹H-NMR signals and six 13C-NMR signalsOb. Five ¹H-NMR signals and five 13C-NMR signals

Answered: Image /qna-images/answer/c95f5af7-75f4-4c3f-9dd4-f76ee10ddeb0.jpg

A dye molecule can exist in one of three forms, shown below. Which of the three has the largest Amax value? HO LOCH 3 HO LOCH 3 OCH 3 a. Form B Ob. They are all the same Oc. Form A Od. Form C QUESTION 3 OO HO How many signals does the aldehyde (CH3)3CCH2CH₂CH₂CHO have in its ¹H-NMR and 13C-NMR spectra? a. Six ¹H-NMR signals and six 13C-NMR signals b. Five ¹H-NMR signals and five 13C-NMR signals Oc. Five ¹H-NMR signals and six 13C-NMR signals Od. Four ¹H-NMR signals and six 13C-NMR signals

A dye molecule can exist in one of three forms, shown below. Which of the three has the largest Amax value? HO LOCH 3 HO LOCH 3 OCH 3 a. Form B Ob. They are all the same Oc. Form A Od. Form C QUESTION 3 OO HO How many signals does the aldehyde (CH3)3CCH2CH₂CH₂CHO have in its ¹H-NMR and 13C-NMR spectra? a. Six ¹H-NMR signals and six 13C-NMR signals b. Five ¹H-NMR signals and five 13C-NMR signals Oc. Five ¹H-NMR signals and six 13C-NMR signals Od. Four ¹H-NMR signals and six 13C-NMR signals

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL4: Proton (1h) Nmr Spectroscopy

Section: Chapter Questions

Problem 4CTQ

See similar textbooks

Similar questions

The Rf values for several dyes in an ink are listed below. Which dye has the greatest affinity for the stationary phase? Dye #1: Rf = 0.263 Dye #2: Rf = 0.551 Dye #3: Rf = 0.737 Dye #4: Rf = 0.882
13C NMR: Draw out the molecule associated with this graph:
what is the structure for this H NMR, C12H16O2 HDI = 5
From the proton spectrum given in Figure 19-45, determine the structure of this compound, a commc used painkiller; its empirical formula is C10H13NO2.
What is qrxn? -3661 J -146.4 J +146.4 J +3661 J
13C(1h) what is bracket mean in this case? is that mean carbon nmr proton nmr in same time?
Identify the remaining three fragments from the table. (m/z=22,16,12) (hint: for m/z=22, the value of Z isn't necessarily 1)
Fill in the following blanks. As the dye concentration increases, the absorbance of the light [linearly increases, linearly decreases, exponentially increases or exponentially decreases]. The dye concentration units are [molar (M), millimolar (mM) or grams per liter (g/L)] . Although most people wrongly conclude that absorbance has units nm, in fact, absorbance is unitless. This is because it results from a ratio of light through a colored sample relative to light intensity through a clear (blank) sample. The units for the slope of the graph would be [mM, 1/mM or nm] . Hint: the slope is the change in y values divided by the change in x values. The units for the y-intercept of the graph would be [nm, nM or unitless] . The value for the slope of the line that describes the absorbance data is [6.4597 or 0.0008] The value for the y-intercept of the line that describes the absorbance data is [6.4597 or 0.0008] .
Suppose you measure the absorbance of a yellow dye solution in a 1.00 cm cuvette (b=1.00 cm). The absorbance of the solution at 427 nm is 0.84 . If the molar extinction coefficient of yellow dye at 427 nm is 27400 M–1cm–1, what is the concentration of the solution in M?
A student uses visible spectrophotometry to determine the concentration of CoCl2(aq)CoCl2(aq) in a sample solution. First the student prepares a set of CoCl2(aq)CoCl2(aq) solutions of known concentration. Then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm510nm and constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown concentration. The original solution used to make the solutions for the standard curve was prepared by dissolving 2.60g2.60g of CoCl2CoCl2 (molar mass 130.g/mol130.g/mol) in enough water to make 100.mL100.mL of solution. What is the molar concentration of the solution? a.) 0.200M b.) 0.500M c.) 1.00M d.) 5.00M
A solution of concentration 23.27 g/L shows a certain absorbance when analyzed in a cuvette using a spectrophotometer. The solution is then diluted and absorbance re-measured. The new absorbance found to be 0.17 times the first value. What is the concentration of the diluted sample? Select one: A. 136.882 g/L B. 39.559 g/L C. 0.007 g/L D. 1.700 g/L E. 3.956 g/L
You are measuring the concentration of an unknown protein sample, and the absorbance at 595 nm (or A595) of your unknown is greater than that of the highest-concentration standard solution. It is not advisable to simply extrapolate the line of the standard curve to calculate the concentration of the unknown In this scenario, what would be the best strategy to measure the concentration of your unknown (instead of extrapolating from the standard curve)?