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• 2006-09-16 23:30 Deglr6328 3500×2441×8 (387879 bytes) transmittance
• 2006-09-10 01:02 Deglr6328 3500×2441×8 (385954 bytes) oops. missing numbers
• 2006-09-10 00:54 Deglr6328 3500×2441×8 (432400 bytes) Dichloromethane near IR spectrum. I took this spectrum using an Ocean Optics HR4000 spectrometer [http://www.oceanoptics.com/] with IR fiber optic light guide. This is a very rough spectrum and should not be used for any kind of quantitative data whatsoev

Unfortunately, this spectrum is quite inaccurate. Please do NOT trust it. The author claims it to be a NIR spectrum of dichloromethane, whereas it is in fact in the mid-IR region which is officiallly from 4000 cm-1 to 400 cm-1. There are many strange absorption bands in this spectrum that cannot be attributed to pure CH2Cl2. This may be a result of the author's use of a spectrometer and detector intended for the NIR which extends from approximately 12,500 cm-1 to 4000 cm-1. The author describes it as a "very rough spectrum", but it is in fact totally misleading as to the position and number of IR absorption bands. A true mid-IR spectrum of dichloromethane using a professional FTIR spectrometer, with or without an ATR accesory, produces much more reliable results that agree with literature data.