Please try to answer full ew pages, you are given several full sets of data, inc
ID: 550592 • Letter: P
Question
Please try to answer full ew pages, you are given several full sets of data, including MS, IR, spectra. Determine the structure for each unknown compound, 2. On the next f 'H. and CNMR Determine including the following in your analysis: (a) From the Mass Spectrum: i. What is the m/z value for the M+? ii. What is the compound's molecular weight? iii. Is there a N atom present? iv. How about Br or CI? v. What is the molecular formula? vi. What is the IHD? (how many bonds and/or rings are present?) (b) From the IR spectrum: what functional groups are present? terminal alkynes should be immediately obvious if they're present) Are there sp2 or sp carbons present? Does this match up with the IHD you calculated? i. (OH, NH, C=O, NO2, ii. (c) From the C NMR: i. How many signals are there? ii. How many unique carbon atoms does this correspond to, and how does that fit your molecular formula? ii. Is the molecule symmetric with respect to the carbon skeleton? ) From the 'H NMR spectrum: i. How many signals are there? ii. What do the signals look like (splitting) and what sort of connectivity gave rise to that splitting? What is the chemical shift value for each signal (how shielded o deshielded is each signal)? What is the approximate relative integration of each signal? iii. iv. IV.Explanation / Answer
(A) 1- m/z peak is 172
2- molecular weight 172
3- nitrogen not present
4- as M and M+2 peaks are equal thus bromine is present
5- C6H5OBr
6- it contains a benzene ring
(b) 1- OH functional group is present
2- YES there are sp2 carbon present.. as it is an aromatic ring
(c) 1- there are six signals in 13C
3- NO , this molecule is not symmetric
(d) 1- there are 5 NMR signals...... 3-bromophenol (compound)