- What is the meaning of n-Pr and i-Pr? - Chemistry Stack Exchange
Apologies in advance, I have a background in physics, so this question might seem awfully simple Anyway, I am interested in the chiral spin selectivity effect in organic molecules, and have read a
- nomenclature - What are the practices to naming organic chemicals by . . .
According to the 2008 IUPAC recommendations (see Table II on page 406), the structural abbreviations Me, Et, Pr, iPr, Bu, iBu, s -Bu, t -Bu, Ac, Ph, Ms, Ts, and Cp may be used freely without further explanation
- Which has higher priority according to Cahn-Ingold-Prelog priority . . .
For sBu and iPr this is easy The Roman numerals I, II, III, IV refer to the "spheres" that are talked about in the Blue Book, which denote the distance from the stereogenic centre Generally, this "distance" refers to the number of bonds: so Sphere I is one bond away from the stereogenic centre, and so on
- organic chemistry - Relationship between thermodynamics and steric . . .
I am investigating reactions with alkyl-substituted amines ($\\ce{R} = \\ce{Me}, \\ce{Et}, \\ce{^iPr}, \\ce{^tBu}$) and a second reagent, in which product Z is formed
- organic chemistry - Newman projections: how to tell which groups are . . .
The scenario Let's say we have a molecule where in the Newman projection the front carbon has a hydrogen, methyl and an ethyl, and in the back carbon there's a hydrogen, something like a S, Cl or
- Reaction of cyclohexene oxide with LDA - Chemistry Stack Exchange
8 Because of the steric hindrance of the two iPr groups, LDA is a very poor nucleophile It is, as you note, a very strong base The two products observed both arise from deprotonation of cyclohexene oxide Deprotonation of one of the methylenes alpha to the epoxide ring opens it to give the allylic alcohol
- nomenclature - Is the i prefix for iso- italicised? - Chemistry . . .
See in particular Table II on page 406, which gives the following forms: iPr, iBu, s -Bu, and t -Bu (which is in line with the Blue Book) It says that if you choose these abbreviations, then explicitly defining them is unnecessary
- analytical chemistry - What are quantifier and qualifier ions in mass . . .
This is a general "identification" rule which should not be restricted to mass spectrometry In chromatography you may be analyzing very closely related analytes whose masses are very close or even identical Think of structural isomers (low resolution MS is blind to enantiomers, isotopomers, isotopologues etc ) Structural isomers may very closely related mass spectra and their molecular ion
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