# Tag Info

### When 2-pentene reacts with HBr, what will be the major product?

This sort of reaction isn't investigated seriously anymore. But 80 years ago, Kharasch et al. (J. Am. Chem. Soc. 1939, 61 (6), 1559–1564) wrote that Both results agreed within the limit of error (3%...
• 69.5k
Accepted

### Why hydrogen bonding in some acids make them a stronger acid when it is present even before deprotonation?

Some of the conformers of salicylic acid are given below, all of which are planar in configuration.$\mathrm{^{[1]}}$ Although the compound can adopt several conformations the first conformer(in the ...
• 447
Accepted

### Acidic strength of nitrophenols

I have recently answer a question about some $\mathrm{p}K_\mathrm{a}$ value discrepancies on different hydroxytetralone derivatives. As Oscar Lanzi pointed out in his answer that the major reason why ...
• 37.9k

### Why don't we consider the attached hydrogens in inductive effect?

I will show you how I understand this effect. I like to think that partial positive charge on $\ce{C1}$ attracts the electrons from $\ce{C2}$ because of the electrostatic force. With this model your ...
• 477

### Acidic strength of nitrophenols

There may be hydrogen bonding between the hydroxyl hydrogen and a nitro group oxygen in the ortho isomer, which would stabilize the proton. But 0.09 $\pu{pK_a}$ unit could be within experimental error....
• 46.7k
Accepted

### How do steric effects affect inductive effect in compounds with tetravalent nitrogen?

Since you are asking for a theoretical explanation, I believe a theoretical calculation might be helpful. It is possible to calculate the partial charges on atoms using electronic structure programs. ...
• 5,507

### Why hydrogen bonding in some acids make them a stronger acid when it is present even before deprotonation?

The other answer has given the major conformer of the protonated form of the o-hydroxybenzoic acid, but I believe there is a part of your question that still remains to be answered. You asked why the ...
• 5,507

### When 2-pentene reacts with HBr, what will be the major product?

Your argument of inductive effect and hyperconjugation, made me to tell you a story about theory behind these two effects. I think after reading that you may able to understand how far we have come ...
• 37.9k

### Inductive effect of hydrogen isotopes

A $\ce{C-D}$ bond has a shorter distance, thus can be in a more favorable position to donate electron density towards an electron deficient center. The $\ce{D}$ has a greater mass, and would show a ...
Accepted

### Effect of phenyl and vinyl substituents on Acidity of carboxylic

When the cases of carboxilic acids are considered, we must note that the conjugation of $\ce{COO-}$ group is so strong in itself, that it's conjugation with the rest of the compound is rendered ...
• 195
Accepted

### Confusion in comparing the contribution of resonating structures to resonance hybrid

For $b$, you have equivalent resonating structures as the structures are identical. The structures $a'$ and $b'$ are not correct as nitrogen cannot expand it's octet. For $a''$ and $b''$, the first ...
• 1,221
Accepted

### Effect of distance on the mesomeric effect

According to the IUPAC goldbook, the definition of the mesomeric effect is as follows, The effect (on reaction rates, ionization equilibria, etc.) attributed to a substituent due to overlap of its p- ...
• 6,710
Accepted

• 37.9k