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Video descriptions

 

Document descriptions

 

Physics: trigonometry--how to break an overall vector into components, and how to determine an overall vector from its components

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Physics: how to solve kinematics problems about general one-dimensional motion

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Kinematics equations

Systematic five-step kinematics method

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Physics: how to solve kinematics problems about one-dimensional projectile motion

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Physics: how to solve kinematics problems about general two-dimensional motion

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Physics: “Torque”.  Torque and rotational motion.

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Rotation

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Physics: “Conservation of energy with rotation”.  Conservation of energy applied to rotational motion.

video

Work and energy

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Rotation

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Physics: “Energy, momentum, torque”.  Conservation of momentum, conservation of energy, Newton’s Second Law for translation and rotation. Springs, inclined planes

video

Work and energy

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Rotation

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Physics: “Statics”.  Translational and rotational equilibrium

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Rotation

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Physics: “Waves and oscillations”.  Period, frequency, angular frequency, wavelength, amplitude. Simple harmonic motion; springs; conservation of energy.

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Physics: “Ideal gas law. Heat, temperature, phase”.  Pressure; gauge pressure. Ideal gas law. Heat, temperature, and phase changes; specific heat and heat of transformation

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Physics: “First Law of Thermodynamics”. First Law of Thermodynamics; internal energy, heat, work. P-V curves. Special processes: isobaric (constant pressure); isochoric (constant volume); cyclic; isothermal (constant temperature); adiabatic (zero heat exchange). State functions

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Physics: “A problem involving electric current”

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Problem discussed in the video

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Physics: “Introduction to lenses and mirrors”.  Introduction to the optics of lenses and mirrors. Concave, convex, converging, diverging; real, virtual; upright, inverted, magnified, shrunk. Sign conventions for focal length, image distance, object distance, magnification. The lens/mirror equation; the magnification equation. Introduction to ray tracing.

video

Problems discussed in videos

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Optics

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Physics: “Lenses and mirrors. Snell’s law”. Radius of curvature. Plane mirrors; ray tracing. Magnification. Special cases--object distance = infinity; object distance = f; object distance = 2f; object distance = 0. Reflection. The speed of light and index of refraction. Refraction; Snell’s law.

video

Problems discussed in videos

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Optics

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Physics: “Lenses, mirrors, the eye”.  Lenses and mirrors. Magnification. Ray tracing. Optics of the eye—normal vision

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Optics

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Physics: “Lenses, mirrors, reflection, refraction”.  Lenses, mirrors, ray tracing. Reflection. Refraction; Snell's Law; the index of refraction; n=c/v

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Optics

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Problem discussed in video (1)

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Physics: “Huygens’ principle; mirrors; the eye”. Huygens’ principle. A lens/mirror problem. An eye problem.

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Optics

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Problems discussed in videos

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Physics: “Light, lenses, mirrors; relativity”.  Light and waves. Lenses and mirrors. A relativity problem.

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Optics

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Problems discussed in videos

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Physics: “Interference and diffraction”.  "In phase" vs. "out of phase". Constructive vs. destructive interference. Double-slit interference. Multiple slit interference / diffraction gratings. Single-slit diffraction; Huygens' principle. Thin films

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Physics: “Thin films”. Thin films. Double-slit interference

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Problems discussed in this video series

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Physics: “Thin films; the eye; lenses and mirrors”. A relativity problem. A problem involving the Doppler effect and diffraction gratings. Thin films. Optics of the eye and of corrective lenses. Lenses and mirrors

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Problems discussed in this video series

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Optics

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Physics: “Intensity of EM waves. Multiple lenses”. Power, intensity, and radiation pressure from electromagnetic waves; the Poynting vector. A multiple lens problem. An eye problem. A contact lens problem

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Problems discussed in this video series

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Optics

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Physics: “Polarization. Total internal reflection”. Polarization of light; the law of Malus. CDs, DVDs, and the diffraction limit. A glasses problem. Refraction, Snell's law, total internal reflection. The Brewster (polarizing) angle.

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Problems discussed in this video series

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Physics: “Intensity. Multiple lenses. Polarization”. Electromagnetic waves—intensity, power, peak electric and magnetic fields. Ray tracing for multiple lenses. Polarization. The Brewster (polarizing) angle. A camera problem.

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Problems discussed in this video series

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Optics

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Physics: “De Broglie wavelength. Bohr atom”. Quantum mechanics--wave/particle duality and quantization. Photons: wavelength, energy, frequency (E=hf). Electrons and other particles with mass: de Broglie wavelength, momentum, energy. The Bohr model of the atom

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Problems discussed in this video series

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Physics: “De Broglie wavelength. Photon energy”. Power and intensity of electromagnetic wavefronts. Blackbody radiation. Photons (E=hf). The de Broglie wavelength. The Bohr atom

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Problems discussed in this video series

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Physics: “Photoelectric effect”. Quantum mechanics. Photoelectric effect. De Broglie wavelength. Heisenberg’s uncertainty principle.

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Physics: “Quantum numbers. Intensity, photons”.  Quantum mechanics. Quantum numbers and the periodic table; allowed quantum numbers. Problems about intensity, photon energy (E=hf), de Broglie wavelength, and the Bohr model of the atom.

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Problems discussed in this video series

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Physics: “Particle in a box. Quantum numbers”. Quantum mechanics. Infinite square well (“particle in a box”)—how to calculate probabilities using the wave function; electron energy-level transitions via photon absorption. Quantum numbers and the periodic table; allowed quantum numbers

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Problems discussed in this video series

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Physics: “Some quantum number problems”. Some quantum number problems, involving possible quantum numbers and ground-state electron configurations

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Problems discussed in this video series

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Physics: “Nuclear physics”. Nuclear physics. Protons, neutrons, and electrons. Mass number (A) and atomic number (“charge number”, Z); conventional symbolism for nuclei. Alpha, beta, and gamma particles; alpha, beta, and gamma decay. Mathematics of radioactive decay; decay constant; half-life. Radioactive dating (carbon-14)

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Problems discussed in this video series

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Physics: “More nuclear physics”. Nuclear physics. Protons, neutrons, and electrons. Mass number (A) and atomic number (“charge number”, Z); conventional symbolism for nuclei. Alpha, beta, and gamma particles; how decay particles behave in magnetic fields. Mathematics of radioactive decay; decay constant; half-life. Biological effects of radiation; rads, RBE (relative biological effect), rems.

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Problems discussed in this video series

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Chemistry: “Buffers. Logarithms”.  Qualitative introduction to buffer solutions (acid/base chemistry). How to approximate logarithms and pHs without a calculator.

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Organic chemistry: how to draw resonance structures

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Organic chemistry: R and S naming

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Stereochemistry

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Organic chemistry: “R and S naming problems”.

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Stereochemistry

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Organic chemistry: electron-pushing arrows

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Organic chemistry: “SN2—‘ionically bonded’ nucleophiles”. How to use electron-pushing arrows and numbering to draw the product of an SN2 reaction. How to recognize “ionically bonded” nucleophiles.

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Organic chemistry: Three types of SN2 reaction

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Organic chemistry: “SN2, SN1, E2, E1”

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Reactivity and arrow-pushing

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SN2, SN1, E2, E1

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Organic chemistry: “E2”.  Introduction to the E2 mechanism. E2 stereochemistry--cis vs. trans, determined by anti-periplanar transition state. Protic vs. aprotic solvents. SN2 stereochemistry

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SN2, SN1, E2, E1

(this revised handout differs somewhat from the older version discussed in the video)

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Organic chemistry: “More SN2, SN1, E2, E1”

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Stereochemistry

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SN2, SN1, E2, E1

(this revised handout differs somewhat from the older version discussed in the video)

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Organic chemistry: “Some SN2, SN1, E2, and E1 topics”.  Polar protic vs. aprotic solvents. Carbocation rearrangements. E2 and E1 regiochemistry (Zaitsev vs. Hofmann). Antiperiplanar transition state for E2; E2 and cyclohexane

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SN2, SN1, E2, E1

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Organic chemistry: “Introduction to Grignards”.  Reaction of Grignards as bases with protic solvents. Reaction of Grignards as nucleophiles with aldehydes and ketones. Introduction to synthesis with Grignards.

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SN2, SN1, E2, E1

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Organic chemistry: “Alcohols, oxidation, and reduction”. Oxidation of alcohols (PCC). Reduction of aldehydes and ketones with Grignards to form alcohols. Synthesis with Grignards. Reduction of aldehydes with NaBH4 or LiAlH4 to form alcohols.

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Reduction and oxidation with alcohols

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Organic chemistry: “Alcohols”.  Reaction of alcohols with acids and bases. Oxidation and reduction involving alcohols—PCC, Grignard reagents.

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SN2, SN1, E2, E1

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Reduction and oxidation with alcohols

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Organic chemistry:  Grignards”.  How to make Grignards and alkyl lithiums (organometallics). Reactions of Grignards and alkyl lithiums (with protic solvents, aldehydes and ketones, and epoxides/oxacyclopropanes). Synthesis problems—using radical halogenation, E2, SN2, oxidation (PCC), and Grignards for synthesis. The “retrosynthesis” technique for solving synthesis problems.

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Radical halogenation

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SN2, SN1, E2, E1

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Reduction and oxidation with alcohols

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Organic chemistry: “Organometallics”. Halogenation of alcohols (PBr3, SOCl2). Organometallics (Grignards, alkyl lithiums, organocuprates). Using the retrosynthesis technique to solve synthesis problems involving organocuprates.

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SN2, SN1, E2, E1

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R- and H-

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Reduction and oxidation with alcohols

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Organic chemistry: “Intro to proton NMR”. Introduction to proton NMR (nuclear magnetic resonance) spectroscopy. Equivalent vs. nonequivalent hydrogens; chemical shift; integration; spin-spin splitting.

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Organic chemistry: “Introduction to proton NMR”. Introduction to proton NMR (nuclear magnetic resonance) spectroscopy. Equivalent vs. nonequivalent hydrogens; chemical shift; integration; spin-spin splitting. Degrees of unsaturation

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Organic chemistry: “Addition to alkenes: H2, HX, H2O”.  Alkene addition reactions. Addition of H2 (hydrogenation). Electrophilic additions: addition of HX (hydrohalogenation); addition of H2SO4, H2O (hydration); addition of H2SO4, ROH. Addition of HX in presence of ROOR (radical addition using peroxide initiator). Regiochemistry: Markovnikov vs. anti-Markovnikov

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Alkenes

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SN2, SN1, E2, E1

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Reactivity and arrow-pushing

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Organic chemistry: “Alkenes: hydrogenation; addition of HX”. Addition reactions with alkenes: addition of H2 (hydrogenation); electrophilic addition of HX (hydrohalogenation). Markovnikov vs. anti-Markovnikov.

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Alkenes

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Organic chemistry: “Addition to alkenes: H2, HX, X2”. Addition to alkenes. Electrophilic addition of HX (halohydrogenation). Addition of H2 (hydrogenation). Addition of HBr with ROOR (radical addition). Addition of Br2 or Cl2 (halogenation).

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Reactivity and arrow-pushing

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Alkenes

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Organic chemistry: “Alkenes: addition of HBr, BH3, X2”. Alkene addition reactions. Addition of H2 (hydrogenation). Addition of HBr, with or without peroxides. Addition of BH3 to get alcohols (hydroboration-oxidation). Addition of X2.

video

Alkenes       

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Reactivity and arrow-pushing

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Organic chemistry: “Hydrogenation and halogenation”. Alkene addition reactions. Problems involving degrees of unsaturation and hydrogenation (addition of H2). E/Z naming of alkenes. Problems involving addition of X2 (halogenation). Forming alkenes from alcohols via E1 (dehydration with H2SO4) or E2.

video

Problems discussed in this video series

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SN2, SN1, E2, E1

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Organic chemistry: “Synthesis of alcohols from alkenes”. Alkene addition reactions. Addition of HX, with or without peroxides. Addition of sulfuric acid and water (hydration). Addition of BH3 (hydroboration-oxidation). Oxymercuration-demercuration. Addition of X2 in alcohol. Creation of expoxides (oxacyclopropanes): from alkenes using MCPBA; from vicinal haloalcohols with base. Ozonolysis.

videos

Alkenes       

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Reduction and oxidation with alcohols

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Organic chemistry: “Dihydroxylation of alkenes”. Alkene addition reactions. Addition of OsO4 (osmium tetroxide) to achieve syn dihydroxylation. Using epoxides to achieve anti dihydroxylation. A synthesis problem. The synthetic toolbox. When does steric hindrance block one face of a trigonal planar intermediate?

videos

Synthetic toolbox

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Organic chemistry: “Synthesis using addition to alkenes”.  Some synthesis problems involving alkenes and electrophilic addition.

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Organic chemistry: using Huckel’s rule to determine whether a molecule is aromatic, antiaromatic, or nonaromatic

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Organic chemistry: “Aldehydes and ketones”. Nucleophilic attack on aldehydes and ketones; the three main categories of nucleophilic attack. A category 1 reaction: attack by a Grignard to form an alcohol. A category 2 reaction: attack by alcohol in acidic conditions to form an acetal or ketal. A category 2 “reverse” reaction: reaction of an acetal or ketal with aqueous acid to form an aldehyde or ketone. How treatment of reagents with acid or base affects reactivity

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Nucleophilic attack on aldehydes and ketones

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Organic chemistry: “More on aldehydes and ketones”. Nucleophilic attack on aldehydes and ketones; the three main categories of nucleophilic attack. Two category 1 reactions: attack by a Grignard to form an alcohol; attack by LAH to form an alcohol. A category 2 reaction: attack by alcohol in acidic conditions to form an acetal or ketal. A category 2 “reverse” reaction: reaction of an acetal or ketal with aqueous acid to form an aldehyde or ketone

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Nucleophilic attack on aldehydes and ketones

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Organic chemistry: “Aldehydes, ketones, enolates”.  Nucleophilic attack on aldehydes and ketones; acetals and ketals. Enolates. Ylides; Wittig reaction. Mechanism problems.

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Organic chemistry: “Carboxylic acid derivatives”. Nucleophilic attack on carboxylic acid derivatives, including hydrolysis, saponification, transesterification.

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Organic chemistry: “More on carboxylic acid derivatives”. Nucleophilic attack on carboxylic acid derivatives, including transesterification, ester hydrolysis, attack by Grignards on esters, amide hydrolysis

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Organic chemistry: “Amino acids”. Biochemistry—amino acids. How to draw amino acids. Acid/base properties of amino acids.

video

 

 

 

 

These videos are offered on a “pay what you like” basis. You can pay for the use of the videos, via PayPal, by clicking this button:

 

 

I offer tutoring via Skype. Click here for more information.

 

 

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