Aldehydes, Ketones, and their Derivatives
Acyclic Aldehydes Rule C-303 303.1 - (a) The name of an acyclic polyaldehyde in which more than two aldehyde groups are attached to an unbranched chain is formed by
adding "-tricarbaldehyde", "-tetracarbaldehyde", etc., to the name of the longest chain carrying the maximum number of aldehyde groups. The name and numbering of the main chain do
not include the aldehyde groups, and numbering follows the general principles for unsaturation and substituents. (b) Alternatively, the name is formed by adding the prefix "formyl-" to the
name of the dial incorporating the principal chain.
303.2 - An aldehyde group in an acyclic compound is named by the prefix "formyl-" when a group having priority for citation as principal group is also present. (See, however, also Rules
C-415, and C-416.)
Examples to Rule C-303.1
303.3 - For an acyclic polyaldehyde, in which the aldehyde groups -CHO are attached to more than one branch of a branched chain, the name of the longest chain carrying the greatest
number of aldehyde groups is used together with a suffix "-dial" (see Rule C-302.1), "-tricarbaldehyde", etc. (see Rule C-303.1), and other chains carrying aldehyde
groups are named by use of "formylalkyl-" prefixes.
Example to Rule C-303.2
See Recommendations'93 R-5.6.1
Examples to Rule C-303.3
Aldehydes Rule C-304, Rule C-305
Ketones Rule C-311, Rule C-312, Rule C-313, Rule C-314
, Rule C-315, Rule C-316, Rule C-317, Rule C-318
Ketenes Rule C-321
Acetals and Acylals Rule C-331, Rule C-332, Rule C-333
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