What is the base peak in a mass spectrum?A) Peak with the highest mass-to-charge ratioB) Peak with the lowest mass - to - charge ratioC) Most intense peakD) Peak corresponding to the molecular ion

Step 1:The most intense peak which is tallest peak in the mass spectrum is called as base peak…

Answered: What is the base peak in a mass…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A.) How many signals does the HNMR of the unknown C6H14O have? B.)Whats the ratio between the number of different hydrogens in the unknown compound C6H14O? C.)Explain splitting patterns of all the signals (in depth if possible the lecture confused me). D.)Explain the chemical shifts of the signals based upon the locations of hydrogens relative to the desheilding groups if any are present in the compound. For A. I think there are 4 signals. For B. I think the ratio is 1:1:3:9 for the hydrogens on the HNMR spectrum. For the last 2 questions (C. and D.) the lecture confused me so an in depth of how you found the answer would be greatly appreciated. Also the unknown for the attached HNMR is C6H14O.
1. What is the molecular ion peak in a mass spec represent? 2. What is the base peak in the mass spec? 3. In the space below differentiate between a mass spec of a compound with one chlorine and a compound with one bromine. Chlorine Bromine
FOR EACH SPECTRUM BELOW, • IDENTIFY (ASSIGN) THE MOLECULAR ION PEAK AND THE MOLECULAR WT OF THE COMPOUND. ( KEEP IN MIND THAT SOMETIMES THE MOLECULAR ION MAY NOT BE PRESENT, ESPECIALLY FOR LARGE AND BRANCHED CHAIN MOLECULES WITH NO RINGS SINCE THEY CAN FORM STABLE CATION FRAGMENTS) • IDENTIFY THE BASE PEAK AND DRAW STRUCTURE FOR IT ( ASSIGNING THE PEAKS).) • ASSIGN STRUCTURES FOR OTHER PROMINENT FRAGMENTS IF POSSIBLE • BASED ON THIS, SUGGEST A STRUCTURE FOR THE COMPOUND THAT IS CONSISTENT WITH THE DEGREE OF UNSATURATION OF THE COMPOUND INDICATE THE BONDS THAT FRAGMENT, RESULTING IN THE OBSERVED MASS SPECTRAL FRAGMENTS
3.
1: Determine nominal m/z value peak 2: Assign the X+2 elements except oxygen (Br, Cl, Si, S) FIRST 3: Assign the X+1 elements (C & N) If N is known to be present, start with N remember to normalize X+1 to X, if necessary (when the X peak is not the base peak in the isotopic cluster) 4: Assign the atoms of oxygen after assigning number of C atoms because of the X+2 contribution from carbon6 can influence the assignment of the number of O atoms 5: Assign the X elements (hydrogen7 , F, P, I) 6: From the elemental composition, determine R+db 7: Propose a possible structure
FOR EACH SPECTRUM BELOW, • IDENTIFY (ASSIGN) THE MOLECULAR ION PEAK AND THE MOLECULAR WT OF THE COMPOUND. ( KEEP IN MIND THAT SOMETIMES THE MOLECULAR ION MAY NOT BE PRESENT, ESPECIALLY FOR LARGE AND BRANCHED CHAIN MOLECULES WITH NO RINGS SINCE THEY CAN FORM STABLE CATION FRAGMENTS) • IDENTIFY THE BASE PEAK AND DRAW STRUCTURE FOR IT ( ASSIGNING THE PEAKS).) • ASSIGN STRUCTURES FOR OTHER PROMINENT FRAGMENTS IF POSSIBLE • BASED ON THIS, SUGGEST A STRUCTURE FOR THE COMPOUND THAT IS CONSISTENT WITH THE DEGREE OF UNSATURATION OF THE COMPOUND INDICATE THE BONDS THAT FRAGMENT, RESULTING IN THE OBSERVED MASS SPECTRAL FRAGMENTS
1. What do you suppose is the molecular weight of the molecule that gives the mass spectrum below? 27 Hai 55 26 45 30 40 50 Rel Abund 100r 80- 60- 40- 20- 0- m/z0 10 Rel Abund = Relative Abundance Formula 1: 20 Formula 2: Formula 3: m/z = mass divided by charge 3. What is the base peak? 2. Provide three different molecular formulas (organic molecules, please) that are possible for a molecule with the molecular weight you have chosen. What are the degrees of unsaturation (SODAR) for each? Degrees of unsaturation: Degrees of unsaturation: Degrees of unsaturation: 60 4. Draw a possible molecule for each formula. based on Formula 1 5. Which structure do you think is correct? 72 70 based on Formula 2 80 What mass is lost from the molecular ion to get to the base peak? 90 100 based on Formula 3
For each chemical formula, determine the number of molecular ion peaks and the molecular ion height ratio.
Identify the compound that gives the mass spectrum and infrared spectrum shown here.
What peak pattern would you expect for the molecular ion of 1,1-dibromoethane?
Which compound is
#3) Using the following spectra and other information provided, identify the compound. Assign pertinent peaks in the spectra. Label the peaks on the spectrum and place the structure of the compound in the box on the right side of the spectrum - Identify correct compound - label proton spectrum - label carbon spectrum

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What is the base peak in a mass spectrum? A) Peak with the highest mass-to-charge ratio B) Peak with the lowest mass - to - charge ratio C) Most intense peak D) Peak corresponding to the molecular ion