1H,2H,3H,5H

English translation: OK as they are

10:43 Oct 14, 2005
English language (monolingual) [PRO]
Tech/Engineering - Chemistry; Chem Sci/Eng
English term or phrase: 1H,2H,3H,5H
5,5-Diethyl-1-methyl-1H,2H,3H,5H-pyrimidine-2-spiro- 9'-fluorene-4,6-dione

From:
http://bioinfo.weizmann.ac.il/iucr-top/journals/acta/tocs/ac...

I think H may mean isotope¡£ If so, should the numbers be superscripts ?

TIA!
Jianming Sun
Local time: 21:56
Selected answer:OK as they are
Explanation:
There are plenty of hits in Google that show this compound just as you have it in the body of your question (with capital letters, indicationg that this is the correct form of writing it. However, if you require a chemical explanation of what the components are... that's another kettle of fish...
Selected response from:

Arcoiris
Local time: 13:56
Grading comment
Now I remember that H's mean extra hydrogens or indicated hydrogens, to indicate the positions of double bond.
3 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 +4OK as they are
Arcoiris


Discussion entries: 2





  

Answers


5 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +4
1h,2h,3h,5h
OK as they are


Explanation:
There are plenty of hits in Google that show this compound just as you have it in the body of your question (with capital letters, indicationg that this is the correct form of writing it. However, if you require a chemical explanation of what the components are... that's another kettle of fish...


Arcoiris
Local time: 13:56
Native speaker of: Native in EnglishEnglish, Native in SpanishSpanish
PRO pts in category: 3
Grading comment
Now I remember that H's mean extra hydrogens or indicated hydrogens, to indicate the positions of double bond.

Peer comments on this answer (and responses from the answerer)
agree  Tracy Livesey: 3H means hydrogen in position 3, nothing to do with tritium
14 mins
  -> thank you for your explanation

agree  Ken Cox: with Tracy (just as '5,5-diethyl' means 'two ethyl groups at position 5')
46 mins
  -> thank you

agree  Will Matter
3 hrs

agree  Jörgen Slet: H's are indicated hydrogens
6 hrs
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