A carbocation is an ion with a positively charged carbon atom. Among the simplest examples are the methenium CH+3, methanium CH+5 and vinyl C2H+3 cations. Occasionally, carbocations that bear more than one positively charged carbon atom are also encountered (e.g., C2H2+4). Until the early 1970s, all carbocations were called carbonium ions. In the present-day definition given by the IUPAC, a carbocation is any even-electron cation with significant partial positive charge on a carbon atom. They are further classified in two main categories according to the coordination number of the charged carbon: three in the carbenium ions and five in the carbonium ions. This nomenclature was proposed by G. A. Olah. Carbonium ions, as originally defined by Olah, are characterized by a three-center two-electron delocalized bonding scheme and are essentially synonymous with so-called 'non-classical carbocations', which are carbocations that contain bridging CβC or CβH Ο-bonds. However, others have more narrowly defined the term 'carbonium ion' as formally protonated or alkylated alkanes (CR+5, where R is H or alkyl), to the exclusion of non-classical carbocations like the 2-norbornyl cation. (Wikipedia).
The Definition of a Linear Equation in Two Variables
This video defines a linear equation in to variables and provides examples of the different forms of linear equations. http://mathispower4u.com
From playlist The Coordinate Plane, Plotting Points, and Solutions to Linear Equations in Two Variables
#Cycloid: A curve traced by a point on a circle rolling in a straight line. (A preview of this Sunday's video.)
From playlist Miscellaneous
Metacognition and speaking | Introduction | Part 1
In this video, I provide an overview of metacognition and discuss its role in speaking.
From playlist Metacognition
What is the difference between convex and concave
π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is the difference between convex and concave polygons
π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What are four types of polygons
π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What are the names of different types of polygons based on the number of sides
π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
This organic chemistry video tutorial provides a basic introduction into the SN1 reaction mechanism. It explains how to identify the major product and It includes example problems with carbocation rearrangements such as the hydride shift and methyl shift. It discusses the stereochemistry
From playlist New Organic Chemistry Playlist
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This organic chemistry video tutorial provides a basic introduction into carbocation stability. It discusses hyperconjugation and the inductive effect of electron donating groups and electron withdrawing groups. It also discusses carbocation stability using resonance structures. SN1 SN2
From playlist New Organic Chemistry Playlist
carbocations and rearrangements
More free lessons at: http://www.khanacademy.org/video?v=fv9h29ZChfI
From playlist Substitution and elimination reactions | Organic Chemistry | Khan Academy
A Level Chemistry Revision "Markownikoff's Rule for Electrophilic Addition to Alkenes"
In this video, we look at Markownikoff's rule for electrophilic addition to alkenes. First we explore why we make two products when we add a hydrogen halide to an asymmetric alkene, looking at the major product and minor product. We then explore how the stability of the carbocation interme
From playlist A Level Chemistry "Organic Chemistry"
E/Z Alkenes, Electrophilic Addition, & Carbocations: Crash Course Organic Chemistry #14
Alkenes are an important type of molecule in organic chemistry that weβre going to see a lot more of in this series. But before we can really get into the many cool reactions alkenes do, we need to go over some of the basics. In this episode of Crash Course Organic Chemistry, weβll review
From playlist Organic Chemistry
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This organic chemistry video tutorial provides plenty of multiple choice practice problems on SN1, SN2, E1, and E2 reaction mechanisms. Get The Full 4 Hour Video on Patreon: https://www.patreon.com/MathScienceTutor/posts Direct Link to The Full Video: https://bit.ly/3Bt4ghw Organic Chem
From playlist New Organic Chemistry Playlist
Alcohol Dehydration Reaction Mechanism With H2SO4
This Organic Chemistry video tutorial discusses the alcohol dehydration reaction mechanism with H2SO4. It covers the E1 reaction where an alcohol is converted into an alkene. it explains how to determine the major product or the most stable zaitsev product. It also discusses the SN1 / S
From playlist New Organic Chemistry Playlist
This video provides a basic introduction into reactions of alkenes. It covers hydrohalogenation of alkenes with carbocation rearrangements. It also covers hydration of alkenes with methyl shifts and ring expansion as well as the hydroboration oxidation reaction and the oxymercuration dem
From playlist New Organic Chemistry Playlist
Hydrohalogenation | Alkenes and Alkynes | Organic chemistry | Khan Academy
Reaction of an alkene with a hydrogen halide, converting the double bond to a halogenated single bond. Created by Jay. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/alkenes-alkynes/alkene-reactions-tutorial/v/hydration?utm_source=YT&utm_medium=Desc&utm_campa
From playlist Alkenes and alkynes | Organic Chemistry | Khan Academy
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π Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
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This organic chemistry video tutorial provides a basic introduction into the hydration of alkenes. It explains how to convert alkenes to alcohols and ethers with the reaction mechanism included. Alkene Reactions 2Hour Review - Part 1: https://bit.ly/3kGvtGO Alkene Reactions 2 Hour Revie
From playlist New Organic Chemistry Playlist