L-Unknown explanation.docx - Rachel Monken Unknown number:...

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Rachel MonkenUnknown number: L-025My unknown, L-025, had a boiling point range of 69 C, refractive index of 1.3960, and adensity of 0.87 g/ml. The unknown liquid I got was 2-chlorobutane (C4H9Cl) which has a CAS #of 78-86-4, a boiling point range of 68-70 which fit what bp range I was given, a refractive indexof 1.396, exactly was refractive index I was given, and a density of 0.873, which, again, wasexactly what I was given for my unknown. First, I used the IR spectra and looked at itsabsorptions to help determine what my unknown was. Most of the peaks in the IR spectra werelocated under the range of 1500 cm-1, the fingerprint region, so I did not look there to helpdetermine what my unknown was. There were peaks at 2850.84, 2880.31, 2938.71, and2972.51. These absorptions were all less than 3,000, and this range that was seen was a Csp3hybridized CH stretch of an alkane because it was a little less than 3000. Anything over thisrange could have been perceived as sp2 hybridized alkene or aromatic CH, so these absorptionsmade me conclude that there were sp3 hybridized C-H bond stretching in my unknown liquid.Next, I looked at the H-NMR spectra. The peak at 0.00 was overlooked and not taken into

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Term
Fall
Professor
Humason,A
Tags
P 2 peak

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