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Why IR carbonyl stretching frequency for an amide is shifted to lower frequencies compared to the carbonyl base value?
Wiki User
∙ 11y ago
The stretch frequency of a bond depends upon the constant force of the bond. In amides resonance structures, i.e. electron donating effect of the nitrogen, lower the force of the bond.
Wiki User
∙ 11y ago
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Differentiation polarity of acetone and ethanol?
as ethanol is an alcohol containing polar group in its structure that is OH it is a polar group.As acetone is a carbonyl compound containig two CH3 groups which are non polar and Carbonyl group is slightly polar compared to alcoholic group so ethanol is highly polar than acetone
What is inductive effect in organic chemistry?
The inductive effect is when atoms within molecules donate some of their charge throughout the molecule. For example, a strongly electron withdrawing group, such as a nitro group (NO2) or a carbonyl (CO), will draw electrons away from the rest of the molecule, making other atoms more positive. An electron donating group, such as a methoxide (OCH3) or just a methyl group (CH3) will donate their charges to other atoms within that molecule. A carbon with a methoxide group next to it will be delta positive (have a relative positive charge compared with a neutral carbon atom), whereas a carbon with a carbonyl next to it will be delta minus (have a relative negative charge compared with a neutral carbon atom).
How does quartz work in the temperature sensor inside the vial in freeze dryer?
A quartz temperature sensor inside a vial in a freeze dryer works by measuring the frequency of the quartz crystal. The quartz crystal is designed to vibrate at a specific frequency when it is exposed to a certain temperature. As the temperature inside the vial changes, the frequency of the quartz crystal changes as well. The frequency is then measured by the temperature sensor and compared to a reference temperature, allowing the freeze dryer to accurately measure and control the temperature of the vial.
Why pka for ethylacetate is 23 whereas that for ethyl acetoacetate is 11?
The most acidic proton in ethylacetoacetate is the methylene between the two carbonyl groups. The anion resulting from deprotonation of this methylene can be resonance stabilised onto both carbonyls, making it more stable and therefore easier to form. The net effect is the proton is more acidic compared to ethylacetate where only one resonance structure can be drawn.
What functional group are found in a monosaccharide?
Monosaccharides are classified by the number of carbon atoms and the types of functional groups present in the sugar. For example, glucose and fructose have the same chemical formula (C6H12O6), but a different structure: glucose having an aldehyde (internal hydroxyl shown as: -OH) and fructose having a keto group (internal double-bond O, shown as: =O). This functional group difference, as small as it seems, accounts for the greater sweetness of fructose as compared to glucose.
How does the frequency measured in front of the source appear to the observer compared to the frequency measured from behind?
The frequencies are the same, unless the source is moving relative to the observer.
What is extremely low frequency radiation?
Low frequency waves are waves with long wavelengths, by definition, since their cycle is slowly repeated. One example is AM radio waves compared to visible light waves. AM radio waves have a frequency of around 1 MegaHertz (1,000,000 s-1) and are around 500 meters long. In contrast, visible light waves have a frequency of around 500 TeraHertz (300,000,000,000,000 s-1) and are around 500 nanometers long (.000000500 meters).
What is the difference between frequency distortion and phase distortion?
A signal that suffers frequency distortion has one of its frequencies shifted higher or lower. A signal that suffers phase distortion has one of its frequencies shifted in time compared to others. Take, for example, a square wave. Shift the phase of the primary harmonic and you have a mess that sounds the same pitch but different. If you shifted the frequency, it would sound higher or lower.
If you compared the frequencies of UV light an visible light you and rsquod find that the UV light had a smaller frequency.?
UV has a HIGHER frequency than visible light. If you get such results, either you are not measuring the correct light, or something else is wrong with the measurement.
What is monochromatic light compared to white light?
Monochromatic light contains light of only one colour (or frequency), while white light contains light of different colours and frequencies.
Do radio waves have a high frequency?
Because the X-ray has a shorter wavelength (kuch shorter!) the energy is much greater in an X-ray. Therefore with a bigger energy, E = hv would calculate a higher frequency for x rays. As the eregy of a wave increases, so goes the frequency. Actually, it probably should be stated the other way, but I still have answered your question
How does the the frequency of a reflected wave compared to the frequency of a incoming wave?
It is double of the incoming wave.
What is the name of A graph used to organize and display data so that the frequencies can be compared?
line graph
Does xrays have a lower frequency?
Compared to most forms of electromagnetic radiation, X-rays have a high frequency. Only gamma rays have a higher frequency.
What is the graph used to organize and display data so that the frequencies can be compared called?
stem and leaf plot
Differentiation polarity of acetone and ethanol?
as ethanol is an alcohol containing polar group in its structure that is OH it is a polar group.As acetone is a carbonyl compound containig two CH3 groups which are non polar and Carbonyl group is slightly polar compared to alcoholic group so ethanol is highly polar than acetone
What is pre-emphasis and de-emphasis in FM?
In FM, the effect of noise is more on higher frequencies when compared with low frequencies. Therefore in order to have high signal-to-noise ratio(low noise), the high frequencies are amplified at the transmitter side and for compensation deemphasis(decreasing the amplitude of those boosted frequencies ) is done at receiver.
