Please show the detailed steps! When examining a mass spectrum, the isotopes For
ID: 915765 • Letter: P
Question
Please show the detailed steps!
When examining a mass spectrum, the isotopes For example, carbon has three isotopes. The most abundant 12^C occurs with a natural abundance on 98.9%. 13^C occurs with 1.1% abundance and 14^C occurs only in trace amounts. In acetone, there is an overall 3.3% probability of one of the three carbon atoms of being 13^C. That means that compared ,to the molecular ion peak at 58, there will be a small peak at 59 (denoted M+1), with a relative intensity of around 3%. Sulfur also has three main isotopes; 32^S (94.9/0 abundant), (0.8% abundant) and 34^S (4.3% abundant). A sulfur-containing molecule will show a prominent M+2 peak because of the natural occurrence of 34^S. The fragmentation patterns of molecules have been well studied and would require an entire course to go through all the details. For this lab, the 'guess and check' method will suffice or any peak assignment Pre-Jab Questions What range of frequencies do you expect to find a P=0 and a P=S bond in the IR spectrum? For triphenylphosphine and triphenylphosphine oxide, indicate the mass to charge ratio (m/z) for the molecular ion. Experimental In order to complete this lab in a timely manner, each partner should work on one of the two compounds. Part A: Synthesis of Triphenylphosphine OxideExplanation / Answer
P=O IR frequency range = 1320-1140cm-1
P=S IR frequency range = 750-535cm-1
This is theoretical question, where values are obtained experimentally.SO, you can find the IR values in scientific literature.