Comments on: Primary, Secondary, Tertiary, Quaternary In Organic Chemistry https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/ Wed, 22 Apr 2026 15:21:33 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: patrizio https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-737175 Sat, 26 Apr 2025 02:33:46 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-737175 I would not say that carbon is pentavalent in the molecular ion CH5+. There 1 carbon and 5 protons are bonded by 8 electrons, not 10. So, carbonis certainly pentacoordinated, but not hypervalent.

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-732765 Thu, 03 Apr 2025 14:47:30 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-732765 In reply to Yonatan Sukhran.

It would be considered tertiary. So your first listing is correct.

For more, see Note #3 in this post:
https://www.masterorganicchemistry.com/2018/10/08/nitration-baeyer-villiger/#notes

]]> By: Yonatan Sukhran https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-732701 Thu, 03 Apr 2025 07:04:31 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-732701 Is a tri-alkylated alpha to carbonyl is considered tertiary or quaternary?
For example, is Baeyer Villiger oxidation, is the rate of migration
H > 3 > 2 > 1 > Me
or
H > 4 > 3 > 2 > 1

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-645961 Wed, 11 Jan 2023 19:05:08 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-645961 In reply to hajar.

OK thanks hajar

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-638200 Fri, 16 Sep 2022 17:07:13 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-638200 In reply to Rob.

Secondary alcohol.

]]> By: Rasad https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-621587 Wed, 23 Feb 2022 12:58:44 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-621587 why can tertiary amines cross the blood-brain barrier but not quaternary amines?

]]> By: Rob https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-619570 Tue, 01 Feb 2022 16:00:39 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-619570 Cyclohexanol is a secondary alcohol. Is the hydroxyl carbon properly referred to as secondary (two carbons attached) or tertiary (one hydrogen attached)?

]]> By: Denise https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-619257 Wed, 26 Jan 2022 14:53:22 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-619257 Thank you !!!

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-605916 Mon, 27 Sep 2021 16:52:40 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-605916 In reply to Bot.

It is unique and belongs in its own category, like ammonia (NH3) for amines and methanol (CH3OH) for alcohols. The terms primary, secondary, tertiary do not apply.

]]> By: Bot https://www.masterorganicchemistry.com/2010/06/16/1-2-3-4/#comment-605859 Sun, 26 Sep 2021 02:44:00 +0000 http://masterorganicchemistry.wordpress.com/?p=520#comment-605859 What type of carbon is methane?(in the case of primary, secondary, tertiary or quaternary)
Or it called something else??
Can you help me plz!

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