secondary Carbon
Structural formula of propane (secondary carbon is highlighted red)

A secondary carbon is a carbon atom bound to two other carbon atoms.[1] For this reason, secondary carbon atoms are found in almost (neopentane, for example, does not have any secondary carbon atoms) all hydrocarbons having at least three carbon atoms. In unbranched alkanes, the inner carbon atoms are always secondary carbon atoms (see figure).[2]

primary carbon secondary carbon tertiary carbon quaternary carbon
General structure
(R = Organyl group)		 frameless=1.0 frameless=1.0 frameless=1.0 frameless=1.0
Partial
Structural formula		 frameless=1.0 frameless=1.0 frameless=1.0 frameless=1.0

References

  1. ↑ Smith, Janice Gorzynski (2011). "Chapter 4 Alkanes". Organic chemistry (Book) (3rd ed.). New York, NY: McGraw-Hill. p. 116. ISBN 978-0-07-337562-5.
  2. ↑ Hans Peter Latscha, Uli Kazmaier, Helmut Alfons Klein (2016), Organische Chemie: Chemie-Basiswissen II (in German) (7. Auflage ed.), Berlin: Springer Spektrum, p. 40, ISBN 978-3-662-46180-8{{citation}}: CS1 maint: multiple names: authors list (link)
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