Topic: IR Spectra
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Answers to Common Questions
What is UV-VIS-IR transmission spectra?
It is a spectra that shows how transparent a material can be. in scientific terms, it is incidence of electromagnetic radiation (from the UV, Visible, Infrared wavelength regions) from a source to a material, and there is a detector which r... Read More »
Source: http://wiki.answers.com/Q/What_is_UV-VIS-IR_transmission_spectra
What are the principle peaks in an IR spectra for benzoic acid?
Carbonyl around 1700 Carboxylic acid OH 2400-3000 C=C aromatic at 1600 & 1475 Read More »
Source: http://wiki.answers.com/Q/What_are_the_principle_peaks_in_an_IR_s...
How do you distingish strecched vibration in ir spectra?
i think in ir spectra the vibrations are common but what is the diffrerance between strecched and vibrational Read More »
Source: http://wiki.answers.com/Q/How_do_you_distingish_strecched_vibrati...
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IR Spectra
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In general, aromatic compounds give bands above 3000cm-1 (this is the C-H stretching). Aliphatic C-H bonds give bands solely below 3000cm-1.
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Source: http://wiki.answers.com/Q/How_do_you_distingwish_between_aliphati...
UV-visible absorption spectroscopy probes electronic transitions due to electronic excited states, where as absorption of IR radiation excites molecular vibrations and no electronic excited states. However, UV-visible radiation can also exc...
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Source: http://wiki.answers.com/Q/Are_st_lucia's_most_famous_peaks_called...
Best guess would be the Sadtler spectra; no idea what the number would be.
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Source: http://wiki.answers.com/Q/Where_can_you_find_an_IR_Spectra_for_Po...
Water will typically have a broad absorption around 3400 cm^-1, which is also the typical area you would look for an -OH peak for an alcohol in an IR spectrum.
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Source: http://answers.yahoo.com/question/index?qid=20081117004702AAhRGlS
the two peaks at 2750 and 2870 cm-1 appear to be an aldehyde peak. go here http://riodb01.ibase.aist.go.jp/sdbs/cgi… and click the "I agree" stuff and then enter acetaldehyde in the search bar and look at the IR spectra.
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Source: http://answers.yahoo.com/question/index?qid=20111023215333AAyJVuf
peak around 3300cm-1 a broad one. C-H stretch of an alkane around 1600cm-1
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Source: http://answers.yahoo.com/question/index?qid=20110920141410AAfI983
