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51 Cards in this Set
- Front
- Back
Fastest Reactor
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Strong Activators
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Ortho/Para Directors
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1. Strong Activators
2. Moderate Activators 3. Weak Activators 4. Weak Deactivators |
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Strong Activators
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NH2 ; NHR ; NR2 ; OH
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Moderate Activators
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NHCOCH3 ; NHCOR ; OCH3 ; OR
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Weak Activators
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CH3 ; CH2CH3 ; R ; C6H5
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Meta Directors
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1. Moderate Deactivators
2. Strong Deactivator |
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Moderate Deactivators
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CN ; SO3H ; COOH ; COOR ; CHO ; COR
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Strong Deactivator
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NO2 ; NR3+ ; CF3 ; CCl3
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Slowest Reactor
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Strong Deactivators
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NH2 ; NHR ; NR2 ; OH
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Strong Activators
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NO2 ; NR3+ ; CF3 ; CCl3
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Strong Deactivators
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Weak Deactivators
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F ; Cl ; Br ; I
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F ; Cl ; Br ; I
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Weak Deactivators
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CN ; SO3H ; COOH ; COOR ; CHO ; COR
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Moderate Deactivators
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CH3 ; CH2CH3 ; R ; C6H5
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Weak Activators
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NHCOCH3 ; NHCOR ; OCH3 ; OR
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Moderate Activators
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Mass Spectroscopy
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1. molecular weight
2. elemental composition 3. fragmentation |
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Nuclear Magnetic Resonance (NMR)
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1. number
2. nature 3. environment of hydrogen in the molecule * the more powerful the molecules, the more powerful the magnets |
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Can the solution of NMR use hydrogen?
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NO HYDROGENS can be used in the solvents on NMR
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Nuclei Spin
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odd numbered mass numbers and off atomic numbers have this _________
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NMR Parallel
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aligns with the magnetic field
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NMR Anti-Parallel
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does against the magnetic field
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Nucleus absorbing energy
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they need to to in order to move from one orbital to another
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NMR has _____ magnetic field & frequency
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BOTH
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NMR - number of hydrogens
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area under the peak is proportional to the number of hydrogens
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NMR - nature of hydrogens
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not all hydrogens are the same - shielding/deshielding
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NMR - environment of the hydrogen
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the higher the electronegativity is deshielding
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Silicon
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one of the MOST electronegative organic molecules
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CHNOPS
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found downfield of the electropositive
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Delta Scale
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small delta = observed shift (H2) x 10^6 / frequency of the generator (H2)
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Will the environment affect the hydrogen shift?
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YES
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Integrator
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Steps
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Chemical Shift
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peak shift depending on the surrounding environments
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Spin-Spin Coupling
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couple either spin against or with the molecule
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2N + 1 rule
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neighbors - add 1 to get the peak
deciphers the degree of unsaturation |
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Alkanes
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CnH2n + 2
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Alkenes
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CnH2n
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Alkynes
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CnH2n - 2
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Off Resonance Decoupling
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the carbons would NOT be split by the other carbons but BY the hydrogens
not commonly used |
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Electromagnetic Radiation
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exposing ion to energy to a molecule
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Absorb energy
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elevate the electron to an excited state
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Fluorescence
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absorb energy
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Phosphorescence
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absorb energy but then drops to an unfavorable level then bounces back but it takes hours
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Beer-Bougner-Lambert Law
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amount of absorbed radiation is directly proportional to the number of molecules in the pathway
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Chromophores
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color producers
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Ultraviolet
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movement of electron from one orbit to another HOWEVER they move to a different orbit than the visible
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Stretch Vibrations
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vibrate back and forth
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Bending Vibrations
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move side to side
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Frequency is related to....
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Mass & Bond Strength
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If the mass of bonded atoms increase.....
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there is an decrease of energy of vibration pressure
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As bond strength increases, frequency
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increases.....
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