CHEMISTRY COMMUNITY

Karan Ishii 3E

Dihedral atoms of eclipsed conformations are 0 because they line up so there's no angle if you look at them from a Newman projection. You're comparing the angles between the 3 hydrogens of each carbon to the other hydrogens. If the hydrogen atoms arranged around the carbon were staggered then there ...

Karan Ishii 3E

Hydroxyl components are not part of organic molecules. OH acts differently depending on what it is attached to.
For example, compare KOH with H3COH.
They both have OH but in KOH OH is a bonded ionically to an alkali metal.

CH3COOH acts as a base but is an organic molecule so uses the alcohol name.

Karan Ishii 3E

Because even the bonds between the carbon atoms are still bent (banana bonds). The arrangement is slightly staggered but there's still high energy.

Karan Ishii 3E

Steric– strain between non bonded atoms that occupy the same space ex) flag pole hydrogens in the boat conformation Torsional strain– strain due to rotation where there is a lot of repulsion. a force opposes rotation of a part of a molecule about a bond ex) CH3-CH3 eclipsed bond strain- when a bond ...

Karan Ishii 3E

I would guess that it's because at high temperatures theres more kinetic energy where the molecules collide more, rotating the butane carbons to be in their conformations that are less stable. Gauche isn't as unstable as the other two eclipsed conformations which would revert more easily to a gauche...

Karan Ishii 3E

My Father is a Chemist my Mother is a Mathematician. They named me iron59.

Karan Ishii 3E

Yes. It is the easiest way to identify a nucleophile.

Karan Ishii 3E

Functional groups come before

ex) 2-chlorobutane is correct
2-butalchlorine or anything else is incorrect

ex) phenylalanine

ex) 2-methylbutane

Karan Ishii 3E

No, at least in this course even if there might be some wack rare compound that does that. Remember that negative charge or partial negative charge repels other negatively charged things. There would be little attraction between positive charges that would result in a reaction unless perhaps theres ...

Karan Ishii 3E

The one with the smallest overall number.

ex) 4-bromo-1-methoxy-2-nitrobenzene is correct
1-bromo-4-methoxy-3-nitrobenze is incorrect

Karan Ishii 3E

It helps to write out the electron configuration because you can clearly see when there are unpaired elctrons that would make the molecule paramagnetic meaning it's attracted to magnets. A bond order that has a .5 is also an indicator of paramagnetism.

Karan Ishii 3E

The reaction system favors the reverse reaction because the K value is very very low. I don't think this is due to the pressure of the system because initially there is the same pressure on both sides of the reaction so I don't think this would result in a favoring of a side (correct me if I'm wrong...

Karan Ishii 3E

Hybridization is part of the valence bond theory so is unrelated to the molecular orbital theory or even the VESPR theory. The Molecular Orbital Theory serves to show that atomic orbitals of bonding atoms combine to form molecular orbitals that aren't localized to one atom but the electrons are spre...

Karan Ishii 3E

Hi I was wondering if there is a place on the website that contains all of the videos that past and present students have made on topics or how to solve specific questions. I find them really useful because its as if I am solving the problems with them.

Karan Ishii 3E

Just wondering... would Kp and Kc be the same for a reaction?

Karan Ishii 3E

No. you just do the molecular orbital energy diagrams I think.

Karan Ishii 3E

Molecular orbitals can help explain periodic trends in electronegativity, ionization energy, and electron affinity in the same way as atomic orbitals and electron configuration. Incomplete molecular orbital = easier to pull off an electron while molecular orbital with two electrons is harder.

Karan Ishii 3E

Yeah some professors choose to have only audio recorded. It just depends on the prof. Some feel more comfortable without visuals but with Lavelle's lectures, all of what he puts up on the board is for the most part covered in the course reader. I mean honestly the best thing is to go to lecture but ...

Karan Ishii 3E

Both are technically correct but just go with [Ar] to save you and anybody else some time.

Karan Ishii 3E

Lecture 1 went up to page 22 in the course reader on Wednesday so that's where in studying up to

Karan Ishii 3E

I'm not really sure what you mean about 'energy status' but I'm guessing you mean what happens to the electron as n increases? So n increases only because the energy of the electron increases. It becomes "excited" and moves to a higher energy shell. This could be from n=1 to n=2, n=1 to n=...

CHEMISTRY COMMUNITY

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Re: Dihedral Angles

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Kp and Kc Same?

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