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Who studied the x-ray spectra of the elements to reveal the ir periodicity?
mosely
How would you distinguish between the following pair of compounds using IR spectoscopy(benzyl alcohol and p-cresol)?
Absorption spectra are different.
What is the instrumental difference in IR and FTIR?
In FT-IR, an interferometer is used to collect a spectrum. This interferometer has a source, a beam splitter, two mirrors, a laser, and a detector. One part of the beam is transmitted to a moving mirror and the other is reflected to a fixed mirror. In Dispersive-IR, there is also a source and mirrors, but the source energy is sent though a sample and a reference path, through a chopper to moderate energy that goes to the detector, and directed to a diffraction grating. The diffraction grating separates light into separate wavelengths and each wavelength is measured individually.
Difference between FTIR and IR?
IR deals with spectra itself and almost without any processing. FTIR transforms IR spectra using Fourier transformation which allows to find very specific frequencies (each element has its own FTIR spectra).
Why does the broad band usually seen in the IR spectra of phenols and alcohols diminish significantly in the IR spectrum of the ortho or meta or para isomer of nitrophenol?
I think it is the ortho position that has a smaller band and this is due to van der waals interactions
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
Where can you find an IR Spectra for Potassium Oxalate monohydrate and what is the spectra number?
Best guess would be the Sadtler spectra; no idea what the number would be.
Who studied the x-ray spectra of the elements to reveal the ir periodicity?
mosely
What is the instrumental difference in IR and FTIR?
In FT-IR, an interferometer is used to collect a spectrum. This interferometer has a source, a beam splitter, two mirrors, a laser, and a detector. One part of the beam is transmitted to a moving mirror and the other is reflected to a fixed mirror. In Dispersive-IR, there is also a source and mirrors, but the source energy is sent though a sample and a reference path, through a chopper to moderate energy that goes to the detector, and directed to a diffraction grating. The diffraction grating separates light into separate wavelengths and each wavelength is measured individually.
How would you distinguish between the following pair of compounds using IR spectoscopy(benzyl alcohol and p-cresol)?
Absorption spectra are different.
Difference between FTIR and IR?
IR deals with spectra itself and almost without any processing. FTIR transforms IR spectra using Fourier transformation which allows to find very specific frequencies (each element has its own FTIR spectra).
Why does the broad band usually seen in the IR spectra of phenols and alcohols diminish significantly in the IR spectrum of the ortho or meta or para isomer of nitrophenol?
I think it is the ortho position that has a smaller band and this is due to van der waals interactions
Why Raman spectroscopy is prefered than other techniques?
Raman is used a lot as it is not sensitive to atmospheric water and CO2 usually won't stand out on the spectra. Its also useful in most settings as there is no sample prep needed, which is quite a difference to somthing like IR spectra which need nujol mulls or KBr plates. In comparison to IR the bands of the spectra are usually smaller and sampling is non-destructive. In an industrial setting raman can be used with fiber optic cables to remotely monitor reactions and product formation.
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
Is solar spectra a continuous spectra?
The Sun spectra is considered continuous.
How Many types of Infrared Spectra?
There are three main types of infrared spectra: absorption spectra, emission spectra, and reflection spectra. Absorption spectra are produced when a material absorbs infrared energy, emission spectra are produced when a material emits infrared radiation, and reflection spectra result from the reflection of infrared radiation off a material.
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 records the amount of radiation remaining after the transmission (these radiation that is gone is either reflected of the surface or absorbed by the material). The equipment that measures this is called UV-Vis-NIR spectrometer.
