Recent content by Steven Hanna

Is it possible to create something like a circuit powered by the strong nuclear force rather than the electromotive force of a battery? If so, what would be examples of some conductors and resistors that could go in such a circuit?

Not sure if I'm posting in the wrong place.

Which is the correct verb to describe the act of making a solution basic?

Try this table. https://labs.chem.ucsb.edu/zakarian/armen/11---bonddissociationenergy.pdf For maingroup elements, E-H BDE's are fairly predictable: decrease down the periodic table, and increase across the periodic table. For transition metals, M-H BDE's increase down the periodic table (1st...

First, this is not a good strategy to determine if a reaction is therodynamically favorable. A reaction is thermodynamically favorable if all of the products are more stable than all of the reactants. So in your example, you should compare the stability of R3COH + F- to that of R3CF + OH-...

Thanks for your quick reply! Two followup questions: 1) Is this formula just an approximation, i.e. could a nuclear magnetic moment weakly interact with that of a p-electron through space? 2) Is the expectation value of this dot product necessarily zero for p electrons?

I'm having a hard time understanding the mechanism of J coupling in NMR. Why is coupling information only transmitted through bonding electrons with nonzero s-character? For example, why can't coupling information be transmitted through a bond with no s-character, e.g. a retrodative bond...

that's true I didn't consider that. but then why is V_g always positive?

So I was actually wondering about that for H2+. Isn't the bond length of H2+ longer than that of H2 simply because a second electron is not delocalized into the internuclear region? Attached is a figure from Anslyn & Dougherty that shows how the kinetic and potential energies of the first two...

Sorry about the exaggeration. At any rate, this explanation is taken from Anslyn & Dougherty's Modern Physical Organic Chemistry (p 812-813).

This is an excellent question! Unfortunately, the explanation given in most gen/org chem classes is a lie. This explanation says that when electrons get to be in between the two nuclei, they are stabilized by attraction to the nuclei. However, you're right, the electrons being next to each...

I agree with TeethWhitener. I don't think a hyperconjugative interaction qualifies as a bond in the first place. But you likely learned in gen chem that a coordinate (or dative) covalent bond is a bond that was formed from a 2 e- interaction between a lewis acid and a lewis base. However, if...

OK I think I get it. If I differentiate the Morse equation twice I get dV/dx = 2D[1-exp(-ax)]*a = 2aD -2aD*exp(-2ax) dV2/dx2 = 4a2D*exp(-2ax)=4(μω2/2D)D*exp(-2ax) = 4μω2exp[-2x*sqrt(μω2/2D)] This final result is not simply equal to μω2, contains an additional mu term, and decreases...

k Sorry to dredge up an old thread, but I'm taking a physorg class and we're talking about isotope effects. So anyway, I understand why the ZPE of DCl is lower than that of HCl, but I'm not quite sure how anharmonicity causes k to not be constant. As I understand it, the series expansion of...

can you explain how it is possible for the units to work out to cm^3 in CGS but not to m^3 in SI?