Fill in the table for Methyl acetylacetate
2. (2 pts) Give the structure and name of the major product of the reduction of methyl acetylacetate with sodium borohydride
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Fill in the table for Methyl acetylacetate 2. (2 pts) Give the structure and name of...
Fill in the box for Methyl acetylacetate Mass spectrum (5 pts): m/z value Charged Fragment Fragment Lost 116 N/A 85 43
Indicate structure of unknown, structure of alcohol product, an percent yield based upon IR spectrum and information provided. Therefore, multiply the calculated amount of sodium borohydride in grams by two to this. Before starting the experiment, show the instructor all of your calculations, Table 1 - Possible assigned unknown aldehyde/ketone. Structure Name benzaldehyde H octanal (octyl aldehyde) CH3(CH2).CH hexanal H 3-methyl butanal (isoamyl aldehyde) H 3-methyl-2-butenal (isopentenyl aldehyde) Н. 3,7-dimethyl-2,6-octadienal (citral) H camphor acetophenone 100 mm 6 TRANSHUTTANCE D 4000...
11. The mass spectrum below is that of benzyl 3-methylbutanoate (see structure below). Provide a structure for the fragments at m/z 144, 129, 116, 115, 101, 99, 73, 71 and 43 (You must show the fragmentation pattern) (0.5x84 pts) 100 43 80 71 115 60 99 40 101 88 144 116 20 125 100 75 50 25 m/z 11. The mass spectrum below is that of benzyl 3-methylbutanoate (see structure below). Provide a structure for the fragments at m/z 144,...
SPECTROSCOPY PROBLEM SET (Homework Assignment 2) [2 pts] Due November 18, 2019 Score: Name: 1. Propose a structure for a hydrocarbon whose mass spectrum shows a parention at m/z 100, a base peak at m/z 43 which gave the following 'H NMR spectrum. PPM 2. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 86 with a base peak at m/z 29, an IR peak at 1720 cm' and which gave the following 'H...
Name: Starting with the mass spectrum of n-heptane What is the molecular ion? What fragment is lost to generate the ion with m/z =71? What cation does the peak at m/z = 43 represent? What group does the spacing between each set of ions represent? Why is the peak at (M-15), corresponding to loss of -CH3 so small? Draw the structure of 2,4-dimethylpentane What is the structure of the ion responsible for m/z = 85? Relative Intensity What is the...
14. (6 pts) Please fill in the blanks in the table below. Chemical Formula Name CrCO3 aluminum sulfate P214 15. (6 pts) How many oxygen atoms are there in 3.00 g of sodium dichromate, Na2Cr2O7? 16. (8 pts) Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.
1. Give the fragment at m/z 42 in the mass spectrum of propan-1-ol. a) CH3CH=CH2+ b) CH3CH=CH2• c) CH3CH=CH2— d) CH3CH=CH2 2. Identify a possibility for a fragment at m/z 43 in the mass spectrum. a) CH3CH2CH2+ b) CH3CH2CH3+ c) CH2=C=CH2+ d) CH3CH=CH2+
Unknown 315-S20-2 Can someone help me fill out the table on the right side please IR Spectrum: Unknown # 315-S20-2 Mol. Wt. = 181.0 g/mol C-33.17% H=5.01% 0 = 17.68% Molecular Formula Degree of Unsaturation = Mass Spectrum IR spectrum (liquid film) 100- Relative Intensity 150 175 25 50 75 100 125 m/z Based on the M.W., circle & label the molecular ion peak (M). Spectrum Region Frequency (cm ) Peak Shape (sharp, broad) MAVUTO Peak Intensity (strong, med., weak)...
Name: Experiment 9: Synthesis of Benzhydrol pre-lab (4 pts) 1) ( pu) Why must the sodium borohydride solution be added slowly to the benzophenone solution? 2) (1 pt) How is the excess sodium borohydride neutralized? 4) (2 pts) The reduction of benzophenone by sodium borohydride is shown below: OH 1. NaBH O 2. HCI 3. H,0 -I MM = 182.22 g/mol MM = 184.24 g/mol A student starts with 4.0 g of benzophenone and adds a sufficient amount of sodium...
5. Draw a structure for and name a compound that is consistent with compound that is consistent with the following MS. abundance 73 M 80 90 100 110 120 130 140 150 160 10 20 30 40 50 60 70 m/z Question 5: Structure and name: Mass Spectrum (include the molecular ion) Observed Fragment & MW Expected MW Fragmentation type Explanation: