Jun 4th, 2016
Studypool Tutor
Price: $15 USD

Tutor description

Identifying formula mass from Mass Spectra and Molecular Structure

Word Count: 584
Showing Page: 1/6
SPECTROCHEMISTRYFORMULA MASS FROM MASS SPECTRAGiven a mass spectra and it is required that a formula mass is determined, the following proceduremust be followed.Step 1: Identify the number of Carbon atomsStep one requires that M, M+1, and M+2 be identified from the mass spectra.M is the mass charge ratio with the highest peaks also known as the base peaks.M+1 is the mass after the base peaks.M+2 is the mass after M+1 mass.Identify the corresponding relative abundance of the M+1 on the y-axis and let it be x%. Thenumber of carbon atoms can, therefore, be obtained using the formula below. =%1.107%Step 2 Identify M+2 contributionCheck on the M+2 spectrum, and if it exists then the following atoms are present, Sulfur, Chlorine,and Bromine.Obtain the relative abundance corresponding to about ( + )% such that if the relativeabundance is as illustrated in the table below then either of the following atoms are present.AtomsRelative abundance of (M+2) %Sulfur4.4%Chlorine31.9%Bromine97.2%Step 3: Identifying Molecular FormulaNitrogen RuleFor an even M, the number of Nitrogen atoms is even i.e. 0, 2, 4 and also that for an odd M, thenumber of nitrogen atoms is odd i.e. 1, 3, 5Limitation to the RuleThe compound we are determining must have the following atoms;Hydrogen, Carbon, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine and IodineHydrogen RuleUnder

Review from student

Studypool Student
" Only issue was the guy's response time which was a bit long, which made me a bit anxious. Reached out to the help desk and they helped me out, turns out the tutors aren't all from US which meant there was a time difference. No issues on the quality. "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1821 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors