Talk:Isobutylidenediurea

Soil Low‑importance

	Earth sciences portal Isobutylidenediurea is within the scope of WikiProject Soil, which collaborates on Soil and related articles on Wikipedia. If you would like to participate, you can choose to edit this article, or visit the project page for more information.SoilWikipedia:WikiProject SoilTemplate:WikiProject SoilSoil
Low	This article has been rated as Low-importance on the project's importance scale.

Chemicals Low‑importance

	This article is within the scope of WikiProject Chemicals, a daughter project of WikiProject Chemistry, which aims to improve Wikipedia's coverage of chemicals. To participate, help improve this article or visit the project page for details on the project.ChemicalsWikipedia:WikiProject ChemicalsTemplate:WikiProject Chemicalschemicals
Low	This article has been rated as Low-importance on the project's importance scale.

IUPAC PIN

Latest comment: 6 months ago2 comments2 people in discussion

@LegionMammal978: Two primes in the claimed IUPAC preferred name added might be incorrect. Regards, —Mykhal (talk) 10:01, 23 September 2025 (UTC)Reply

There are two levels of prime marks: primes to differentiate the nitrogen atoms within the urea components, and primes to differentiate between the urea components. The primes within the components take precedence. For urea using N and N′, see P-66.1.6.1.1. For handling primed N locants in multiplicative nomenclature, see P-15.3.2.2.1, which has an example of an N′,N′′′ locant set.

In this case, the N and N′ atoms are symmetrical in the urea components, so technically we have a choice between N,N′′; N,N′′′; N′,N′′; or N′,N′′′. But we always want to choose the lowest possible attachment locants for the multiplied parent components, see P-15.3.1.3. So our final locant set is N,N′′.

(Incidentally, this name is a good example of why I don't trust any software in existence to reliably generate PINs. PubChem's software has no clue about multiplicative nomenclature, while ChemSpider's software thinks urea uses arabic numerals instead of N,N′.) LegionMammal978 (talk) 04:28, 3 December 2025 (UTC)Reply

Add topic