substitué à

12:23 Jun 17, 2017 

You're welcome. I agree that 'nitrogen-substituted derivatives' works well in this case.

10:22 Jun 17, 2017 

Many thanks to all for your assistance and taking the time to explain things in detail, particularly herbalchemist.

19:55 Jun 16, 2017 

Yes, you're right. The grammar is not a sufficent explanation in context.

11:33 Jun 16, 2017 

Marco and dwt2's interpretations are correct. In the field, 'nitrogen-substituted' means that substitution occurred at the N atom, either actually or in comparison to a simpler reference compound. Following the English language, 'nitrogen-substituted' means 'substituted with nitrogen', but this interpretation is wrong in this context. The term is a shorthand for 'substituted at the nitrogen atom'.

10:11 Jun 16, 2017 

The nitrogen is not replaced nor does replace anything in the derivatives. The phrase means that in the derivatives (of aminobenzene or aminotoluene), a group has replaced a hydrogen atom bound to the nitrigen (both aminobenzene and aminotoluene have two hydrogens bound to the nitrogen). The full phrase suggested by dwt2 ("nitrogen -substituted derivatives" is right).

09:27 Jun 16, 2017 

From a grammar point of view, the aminbenzo/tolu-ènes are replacing the nitrogen. The former subsitutes the latter.

09:09 Jun 16, 2017 

If I remember my chemistry, I think that means derivatives that contain nitrogen substitutions (certain groups or elements are replaced by nitrogen), so "aminobenzene and derivatives with nitrogen substitutions, as well as their salts," but you'd better check with a chemist.

08:42 Jun 16, 2017 

that replace