orthonym.assembly.handlers.thiourea

Note

Internal API. Names and behaviour may change between releases.

Chalcogen-urea handler — retained parent thiourea/selenourea/tellurourea.

Residue R3. Mirrors handlers/urea.py exactly; the body lives in composer._try_name_thiourea for the same reason urea’s does.

IUPAC cite: “Chalcogen analogues of urea and isourea” (the Blue Book Blue Book), subsection (:33439): “Chalcogen analogues of urea are named by functional replacement nomenclature using the prefixes ‘thio’, ‘seleno’, and ‘telluro’. Preferred IUPAC names use the letter locants N, and N’.” Worked (PIN) examples: thiourea (PIN) (:33444) and N-(butan-2-yl)selenourea (PIN) (:33451).

Why the parent is the thiourea and not the ring the molecule also carries:

(:33320) ranks urea “as an amide of carbonic acid”; puts amides at class 11 (:18184) against carbon rings at class 40

(:18216); (:18875) selects on that order; and the “ring outranks chain” licence is gated on “Within the same heteroatom class” , :24096), which a class-40 ring does not share with an amide.

orthonym.assembly.handlers.thiourea.name_thiourea(features, mol=None, style='pin')

Tier-B chalcogen-urea retained-name handler.