5k views

### Are the lone pairs in water equivalent?

I've read that the oxygen atom in water is $\mathrm{sp^2}$ hybridized, such that one of the oxygen lone pairs should be in an $\mathrm{sp^2}$ orbital and the other should be in a pure p atomic orbital....
9k views

### Why are DCM and chloroform so resistant towards nucleophilic substitution?

In the book Organic Chemistry by J. Clayden, N. Greeves, S. Warren, and P. Wothers I found the following reasoning: You may have wondered why it is that, while methyl chloride (chloromethane) is a ...
2k views

### What is Y-aromaticity? Is the trinitromethanide anion aromatic?

The wikipedia article on trinitromethane claims that: There is some evidence that the anion (which obeys the $4n+2$ Hückel rule) is aromatic. Unfortunately the citation is behind a paywall so I ...
10k views

### What is the molecular geometry of NHF₂?

I had to draw the molecular shape for $\ce{NHF2}$ as a Trigonal Planar like this But when I check to make sure it was right, I came across a source saying NHF2-difluoroammonia--tetrahedral, ...
13k views

### What is the hybridization of the carbonyl oxygen in a carboxylic acid?

My professor sent out a review guide. One of the questions on this guide is The carboxylic acid carbonyl oxygen is: 1. $\ce{sp^2}$ 2. $\ce{sp^3}$ 3. $\ce{H}$-bond donor 4. rapidly ...
13k views

### Are carbocations necessarily sp2 hybridized and trigonal planar?

My copy of Pearson's Organic Chemistry (7e), Morrison and Boyd, under the section "Reaction intermediates", accords a succinct description on the structure of carbocations: The central $C$-atom (of ...
22k views

### Why the bond angle of PH3 is lesser that that of PF3?

We can explain why the bond angle of $\ce{NF3}$ (102°29') is lesser than $\ce{NH3}$ (107°48') by the VSEPR theory, since lone pair lone pair repulsion is greater than lone pair bond pair repulsion. ...
28k views

So we have to find which of the follwing compounds has the smallest bond angle: $\ce{H2O}$, $\ce{H2S}$, $\ce{NH3}$, $\ce{SO2}$. So L $\propto \frac{1}{BA}$ where $L$ is the number of lone pairs and $... 1answer 5k views ### Is the phenyl cation or ethynylium more stable? I recently gave an exam and I received an interesting question to which I believe the answer is wrong. Given two compounds, a benzene molecule with carbocation at one of its constituting carbon atoms ... 4answers 11k views ### Why is the H−C−H bond angle in сhloromethane larger than 109.5°? Symmetrical tetrahedral molecules (like$\ce{CH4}$) have a bond angle of$109.5$. Those with lone pairs in place of one atom (like$\ce{NH3}$) have bond angles less than$109.5$. The standard ... 4answers 6k views ### What is the CNC bond angle in methyl isocyanate? Methyl isocyanate,$\ce{HC3NCO}$, is a toxic liquid which is used in the manufacture of some pesticides. What is the approximate angle between the bonds formed by the nitrogen atom in a molecule of ... 2answers 5k views ### What are the bond angles in cyclohexane? In the chair conformation of cyclohexane, what are the angles of the triangles defined by: a carbon atom, an axial hydrogen bonded to it, and the midpoint of a vicinal C-C bond ? a carbon atom, an ... 1answer 1k views ### Comparison of C-Cl bond length in CH3Cl and CF3Cl How can one compare the$\ce{C-Cl}$bond lengths in chloromethane ($\ce{CH3Cl}$) and chlorotrifluoromethane ($\ce{CF3Cl}$)? Bent's rule is also consistent with Gillespie's VSEPR model, and may ... 2answers 443 views ### Comparing bond angles in carbonyl dichloride and carbonyl dibromide Background I was studying VSEPR and hybridization theory and one of the popular questions in many textbooks was comparison of bond angle of$\ce{NH3}$,$\ce{NF3}$and$\ce{NCl3}$.$\ce{NF3}$had ... 1answer 88 views ### Negative s - orbital chatacter I am learning about how to calculate s-orbital character. While doing so, I came across a formula $$\cos\theta = \frac{s}{s-1}.$$ For cycloproprane, I used$\theta = 60^\circ,$and got$s = -1.\$ How ...

15 30 50 per page