NaOH is a strong nucleophile and strong base. The substrate in this case is primary. Therefore, we expect SN2 (giving the major product) and E2 (giving the minor product). b) NaSH is a strong nucleophile and weak base. The substrate in this case is primary. Therefore, we expect only SN2. c) When a primary alkyl halide is treated with t-BuOK, the predominant pathway is expected to be E2. d) DBN is a weak nucleophile and a strong base. Therefore, we expect only E2. e) NaOMe is a strong nucleophile and strong base. The substrate in this case is primary. Therefore, we expect SN2 (giving the major product) and E2 (giving the minor product).<\/p>\n\n\n\n
The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n Your analysis of substitution and elimination reactions involving primary alkyl halides and different reagents is largely on track. Let\u2019s go through each case and then summarize the logic behind the expected mechanisms:<\/p>\n\n\n\n a) NaOH (Strong Nucleophile and Strong Base) + Primary Substrate<\/strong> b) NaSH (Strong Nucleophile, Weak Base) + Primary Substrate<\/strong> c) t-BuOK (Strong Base, Bulky) + Primary Substrate<\/strong> d) DBN (Strong Base, Poor Nucleophile) + Primary Substrate<\/strong> e) NaOMe (Strong Nucleophile and Base) + Primary Substrate<\/strong> For primary substrates:<\/p>\n\n\n\n This approach ensures accurate prediction of mechanisms based on the substrate and reagent nature.<\/p>\n","protected":false},"excerpt":{"rendered":" NaOH is a strong nucleophile and strong base. The substrate in this case is primary. Therefore, we expect SN2 (giving the major product) and E2 (giving the minor product). b) NaSH is a strong nucleophile and weak base. The substrate in this case is primary. Therefore, we expect only SN2. c) When a primary alkyl […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-13337","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/13337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=13337"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/13337\/revisions"}],"predecessor-version":[{"id":13338,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/13337\/revisions\/13338"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=13337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=13337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=13337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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Correct Prediction: Major SN2, Minor E2<\/strong>
Explanation: Primary substrates are sterically unhindered, favoring bimolecular substitution (SN2) with strong nucleophiles like NaOH. However, because NaOH is also a strong base, E2 can still occur as a minor pathway, especially under heat.<\/p>\n\n\n\n
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Correct Prediction: Only SN2<\/strong>
Explanation: NaSH is a good nucleophile but a poor base. It prefers substitution over elimination. Given the primary substrate\u2019s low steric hindrance, SN2 is highly favored, with negligible E2.<\/p>\n\n\n\n
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Correct Prediction: Predominantly E2<\/strong>
Explanation: Despite the substrate being primary, t-BuOK is a bulky base, disfavoring backside attack (required for SN2). As a result, elimination via the E2 mechanism dominates, yielding the less substituted (Hofmann) alkene due to steric hindrance.<\/p>\n\n\n\n
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Correct Prediction: Only E2<\/strong>
Explanation: DBN is a non-nucleophilic base, favoring elimination. Even with a primary substrate, E2 occurs efficiently, especially under heat or in aprotic solvents.<\/p>\n\n\n\n
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Correct Prediction: Major SN2, Minor E2<\/strong>
Explanation: Similar to NaOH, NaOMe is both a strong base and nucleophile. The primary substrate allows SN2 to proceed rapidly, but E2 remains possible under suitable conditions.<\/p>\n\n\n\n
\n\n\n\nSummary:<\/h3>\n\n\n\n
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