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The 8th edition of Organic Chemistry by Paula Bruice suggests that secondary alkyl halides do not undergo SN2 reactions. However, many other sources state the opposite. So, what is the correct answer?

Tertiary alkyl halides undergo SN1 solvolysis reactions with poor nucleophiles such as water and alcohols, but methyl halides and primary alkyl halides do not. A recent investigation of Huges and Ingold's data showed that secondary alkyl halides also do not undergo SN1 solvolysis reactions.* Thus, methyl halides, primary alkyl halides, and secondary alkyl halides undergo only SN2 reactions.

The textbook refers to Murphy, T.J. J. Chem. Ed. 2009, 86, 519-524.

I'm curious as to whether this assertion has been upheld or disproved by other members of academia.

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    $\begingroup$ Possible duplicate of SN2 vs SN1 in Secondary Alkyl Halides $\endgroup$ – Mithoron Apr 3 '18 at 15:43
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    $\begingroup$ @Mithoron That seems to be a way more generalized question. I think analysing this specific quote from Paula Bruice may be of help to future readers of this book. Also, that "Hughes and Ingold's" data seems interesting, and isn't covered in that other post. So, I think Leave Open is a better option here. $\endgroup$ – Gaurang Tandon Apr 3 '18 at 15:56
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    $\begingroup$ There seems to be the general understanding that it has to be one or the other, which is truish only for the most extraordinary cases. The truth lies somewhere in between and is heavily dependent on all parameters of the reaction, to name a few: solvent, temperature, pressure, nucleophile. I don't think this question should be closed, but I would like to lower your expectations as to what kind of answer you'll get. $\endgroup$ – Martin - マーチン Apr 3 '18 at 16:40

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