What is Elimination: Definition and 163 Discussions

An elimination reaction is a type of organic reaction in which two substituents are removed from a molecule in either a one- or two-step mechanism. The one-step mechanism is known as the E2 reaction, and the two-step mechanism is known as the E1 reaction. The numbers refer not to the number of steps in the mechanism, but rather to the kinetics of the reaction: E2 is bimolecular (second-order) while E1 is unimolecular (first-order). In cases where the molecule is able to stabilize an anion but possesses a poor leaving group, a third type of reaction, E1CB, exists. Finally, the pyrolysis of xanthate and acetate esters proceed through an "internal" elimination mechanism, the Ei mechanism.

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  1. A

    Understanding the Principle of Gauss-Jordan Elimination for Finding Inverses

    just wondering... why does that method work for finding A^(-1)? in other words, what's the principle behind that method?
  2. H

    Gauss-Jordan Elimination Method Help

    Gauss-Jordan Elimination Method Help! Hi, I'm having a problem solving the following using the Gauss-Jordan Elimination Method. I am wondering if someone can help me... i.e. [ [2 5 -1 -3] [1 -1 4 20] [3 2 -1 3]] I've tried solving it by... R1<-->R2, R2+(-1)R1, R3+(-3)R1...
  3. C

    Solve system of three equations using elimination

    How can I use elimination to solve a system of three equations that are 3-dimensional using elimination? When I do it the point I find doesn't work for all three equations.
  4. J

    Help with Gaussian Elimination

    S = Columns 1 through 3 1.0000 0 0 0 1.0000 0 0 0 1.0000 Columns 4 through 5 0.2750 -0.2786 -0.1750 0.5929 0.2250 0.1357 Which is the rref of A = 2 9 9 1 6 2...
  5. T

    Solution: Solve Gaussian Elimination | 2x1 + 1x2 = 4

    2 1 1 | 4 -1 2 1 | 3 7 6 5 | 19 Need a little help please
  6. M

    Identifying Inconsistent Systems of Linear Equations with Gaussian Elimination

    Any help on this one would be greatly appreciated. Due to that I can't find much of a connection (due to lack of inconsistent set of linear equations), and the fact that I'm unable to explain it properly, can someone please help me? Here's the question: If a system of linear equations is...
  7. Norman

    I love the TV show Most Extreme Elimination Challenge

    I love the TV show Most Extreme Elimination Challenge also known as MXC. It is horrible and has no redeeming social value, but I laugh my butt off. Anything that is voiced over in English I find funny, but this game is completely out of control. Anyone else a fan? My wife and I love to watch...
  8. A

    Solving Gaussian Elimination Algorithm Problems (Matrices)

    I tried to solve this Gaussian elimination algorithm problem (matrices) but for some reason when I plug in the x variables it doesn't work. The problem is: Alright so the first thing I did was divide the 1st row by 1/3 (scaling). Then I made the entries below the first pivot equal to 0...
  9. A

    Solving Gaussian Elimination Algorithm Problem (Matrices)

    I tried to solve this Gaussian elimination algorithm problem (matrices) but for some reason when I plug in the x variables it doesn't work. The problem is: Alright so the first thing I did was divide the 1st row by 1/3 (scaling). Then I made the entries below the first pivot equal to 0...
  10. E

    Solve System of Equations via Gaussian Elimination

    I am not sure how to solve this: Given an augmented matrix, find conditions on a, b, c for which the system has solutions: -1 -2 3 b -1 -6 23 c -3 2 4 a so by Gaussian elimination, the matrix I ended up with is 1 2 -3 -b 0 4 -20 b-c 0 0 -35...
  11. R

    How does the elimination method work for solving simultaneous equations?

    I need a math guru to explain why and how the elimination method of solving simultaneous equations works ? why do we add or subtract the two equations ?(I undertand in order to eradicate either term) but I need to know from the basics . For that matter, how/why does the substitution method...
  12. P

    Guassian elimination and Inverse Matrix

    I'm still having trouble with Guassian elimination and finding the Inverse of a Matrix. I tend to get confused with the switching of the rows or factoring out something. Example matrix 1 1 1 | 1 1 1 -2 | 3 2 1 1 | 2 so it's a system of linear equations and I...
  13. MathematicalPhysicist

    Is Gaussian Elimination Only Used for 3x3 Matrices?

    is this elimination used only in 3*3 matrix?
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