http://webbook.nist.gov/cgi/cbook.cgi?ID=B6002039&Mask=80#IR-Spec ? I don't think so. Otherwise, plutonium hexafluoride is so common that you can find kilograms at every second universities and all the students are allowed to work with it :)
You are right, usually the question does not contain enough information (here: organic or inorganic, etc.) and many times the question is not only ill-posed but wrongly formulated.
Yes, unfortunately, many questions posted on RG are "ill-posed", and contain insufficient information. Therefore, those who truly wish to help the less experienced ones among us, are hampered in their effort to provide meaningful, high quality answers.
Hi Laszlo, the result is not hidden, what happened was that I corrected the background without ensuring proper removal of the previous sample as I'm working with a high pressure liquid ATR cell. Although I flush it with acetone, proper cleaning usually takes time. in this absorbance spectrum, there are small negative aliphatic hydrocarbon peaks visible. The cell was contaminated by oil, and at the time of the background correction, the oil level was higher than when the blank was run. This resulted in subtraction of the hydrocarbon peaks and the spectrum being inverted.