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"O,O-" and "S-" and "-1H-"

21:24 Aug 29, 2023
English language (monolingual) [PRO]
Science - Chemistry; Chem Sci/Eng
English term or phrase: "O,O-" and "S-" and "-1H-"
Would you please clarify the meaning of "O,O-" and "S-" and "-1H-"?
Please see text below

Phosphorodithioic acid, mixed O,O-bis(2-ethylhexyl and iso-Bu and iso-Pr) S-[3a,4,5,6,7,7a-hexahydro-4,7-methano-1H-inden-5(or 6)-yl] esters

Many thanks!
Ali Al awadi
Türkiye


SUMMARY OF ALL EXPLANATIONS PROVIDED
3 +1O = ortho; S- = S enantiomer, ("Sinister" → Latin= "left"); 1H is the position of the H atom on
Neil Ashby
5 -1O,O- and S- are locants / 1H refers to indicated hydrogen
CisTrans


Discussion entries: 3





  

Answers


12 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +1
"o,o-" and "s-" and "-1h-"
O = ortho; S- = S enantiomer, ("Sinister" → Latin= "left"); 1H is the position of the H atom on


Explanation:
O = ortho; S- = S enantiomer, ("Sinister" → Latin= "left" (direction of rotation of light at a given stereocentre); 1H is the position of the H atom on carbon atom number 1.

Good luck!

Neil Ashby
Spain
Local time: 19:45
Specializes in field
Native speaker of: English

Peer comments on this answer (and responses from the answerer)
agree  Clauwolf
2 hrs
  -> Thanks!
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1 day 13 hrs   confidence: Answerer confidence 5/5 peer agreement (net): -1
O,O- and S- are locants / 1H refers to indicated hydrogen


Explanation:
O,O- and S- are locants.
These locants designate the sulfur and oxygen atoms to which the ester groups are linked in phosphorodithioic acid.

References:
https://www.acdlabs.com/iupac/nomenclature/79/r79_578.htm
https://de.wikipedia.org/wiki/Lokant (Kursiv gesetzte lateinische Großbuchstaben part)

1H refers to indicated hydrogen.

References:
https://iupac.qmul.ac.uk/BlueBook/P1.html#1407
https://iupac.qmul.ac.uk/hetero/HW2t5.html#16
https://www.acdlabs.com/iupac/nomenclature/93/r93_176.htm


CisTrans
Switzerland
Local time: 19:45
Specializes in field
Native speaker of: Native in FrenchFrench

Peer comments on this answer (and responses from the answerer)
disagree  Neil Ashby: Locants? Locants are numbers or Greek letters (https://en.wikipedia.org/wiki/Locant). S marks a chiral centre and its direction of rotation (definitely not a locant). What is the "indicated hydrogen" - that doesn't mean anything at all.
2 days 22 hrs
  -> There are many types of locants (https://iupac.qmul.ac.uk/BlueBook/P1.html#1403) - For O,O- and S-, see https://www.acdlabs.com/iupac/nomenclature/93/r93_74.htm (R-0.1.6.2) + Kursiv gesetzte lateinische Großbuchstaben - For 1H, see IUPAC def. in response.
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