Structure and stability of common carbocations

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00:21 Fluoromethane (methyl fluoride)
00:50 Chloromethane (methyl chloride)
01:11 Bromomethane (methyl bromide)
01:29 Iodomethane (methyl iodide)
02:01 Polarity of halo-carbon bond
02:42 Methyl carbocation
03:29 Table
04:29 Ethyl carbocation
06:25 Ethyl carbocation (side view), showing hyperconjugation interaction
08:22 1-propyl (n-propyl) carbocation
10:37 2-propyl (iso-propyl) carbocation
11:45 tert-butyl (2-methyl-2-propyl) carbocation

Computed enthalpies of formation of carbocations from haloalkanes, and the relative stability, are demonstrated. Single point energies computed using MP4/6-311++G(2d,p). Figures created using ChemCraft program.

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00:21 Fluoromethane (methyl fluoride)
00:50 Chloromethane (methyl chloride)
01:11 Bromomethane (methyl bromide)
01:29 Iodomethane (methyl iodide)
02:01 Polarity of halo-carbon bond
02:42 Methyl carbocation
03:29 Table
04:29 Ethyl carbocation
06:25 Ethyl carbocation (side view), showing hyperconjugation interaction
08:22 1-propyl (n-propyl) carbocation
10:37 2-propyl (iso-propyl) carbocation
11:45 tert-butyl (2-methyl-2-propyl) carbocation

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