![]() ![]() Hyrdogen-Bonded Hydroxyl Groups" in the Introduction to IR Spectra for more information Phenols MUST have Aromatic Ring Absorptions too.Alkane C-H bonds are fairly ubiquitous and therefore usually less useful in determining structure.Ībsorption peaks above 3000 cm -1 are frequently diagnostic of unsaturation The absorptions can be seen a several distinct peaks in this Principal IR Absorptions for Certain Functional Groups above 1400Ībsorption in these regions unless stated otherwise.] Click the Delete icon to clear the screen for the next user, or if nobody is waiting, please Exit the program.įollowing is an example data table which you should use to displayįrequency absorptions were taken from Table 1 below) Then, use damp ethanol KimWipes to thoroughly clean the sample area and pressure arm. CLEAN UP!Remove your liquid sample with KimWipes or use the vacuum to remove your solid sample from the sample area. (If you must print your spectrum, click on the Print icon to print a copy of your spectrum.)ħ. Save your spectrum as a jpeg file on your USB drive. Open the Paint program (if it isn’t already open) and Paste in your spectrum.Ĭ. Save your spectrum to your USB flash drive.ī. You have control of the font, and you can drag the text to a new position after it is written.Ħ. To add text to your spectrum, click on the Text (ABC) icon. Double click on the green line to remove the line. To label peaks that are still unlabeled, click on the vertical cursor icon, Vcursr, then drag the green line over the peak and double click. Clicking a second time removes the labels. To label peaks, click on the Peaks icon to automatically label your peaks. For a liquid, click the Scan button to start your scan.į. Click the Stop button and then click the Scan button to start your scan.Į. Adjust the pressure until the green bar almost fills the window. You will see a green bar appear in the Force Gauge area. Then choose the Sample icon (the middle of the three blue-ringed icons) and adjust the pressure by turning the knurled knob on the pressure arm. For a solid, click on the Monitor icon (it looks like a fuel gauge) in the upper left corner of the window. Fill in the description and comments as you choose. Choose the Sample tab and enter a filename for your sample in the Name line. The Spectrum One Scan and Instrument Setup window will open. Swing the pressure arm over the sample and adjust until it touches the sample. Place a small quantity of your sample on the center of the sample plate. The background scan is not lost, just stored!Ī. Click the Delete icon to clear the spectrum window. When the scan is complete, you may be asked if you want to overwrite the old background scan. A bar in the lower left corner of the screen shows the progress of the scan. The window will refresh, and soon you will see your background scan as it is running. Click the Apply button and then the Scan button. All other settings can be left with their default values.ĭ. Next click on the Scan tab and, under Options in the middle of the page, select Background as the Scan type. Choose the Sample tab and type the name background for Name. ![]() It has several pages accessed by clicking on the tabs. A window titled Spectrum One Scan and Instrument Setup will open. Choose Scan from the Instrument menu drop down list.Ĭ. Make sure the sample area is clean and empty and DRY (from cleaning with ethanol).ī. If you are not the first user and there is a spectrum already displayed, click on the Delete icon to clear the window for you and skip to step 4 below.Ī. Then you will see a message, which is titled “Accessory Ready Check”. The program will open and check the hardware. IR SPECTRUM FUNCTIONAL GROUPS PASSWORDWhen prompted, log in as chem212 with the password org212. IR SPECTRUM FUNCTIONAL GROUPS SOFTWAREIf the software is not already running, double click on the Spectrum icon to start the acquisition program. The web tutorial Infrared Spectroscopy and Organic Functional Groups has more information.ĬHEM 211 students may run IR spectra only during their regularly scheduled laboratory time.ġ. To the literature absorptions of various functional groups, you canĭetermine a list of possible identities for the bonds present. ![]() By comparing the absorptions seen in an experimental spectrum Present in a compound, you can establish the types of functional groups By identifying the different covalent bonds that are Through the identification of different covalent bonds that are present Technique used to identify various functional groups in unknown substances ![]()
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