*(Fig.1) Unreal spin is really involved in hydrogen molecule bond ?*

Textbooks in quantum mechanics often argue that "up" and "down" spins **form** molecular bonds. But in fact it's physically **impossible**.

Because spin-spin magnetic interaction (= only 0.001 eV ) is too weak to cause any molecular bonds (= 3-4 eV ). So spin has **nothing** to do with molecular bonds !

*(Fig.2) Point-like electron ( radius r → 0 ), rotation v → ∞*

Angular momentum is given by mv × r ( v = velocity, r = radius ).

Electron spin also has angular momentum 1/2ħ, they claim

The problem is an electron is very tiny, point-like.

The point-like particle means its radius r is almost **zero**.

So to get the angular momentum 1/2ħ, the electron spinning must far exceed light speed ( this p.5, this )

So the electron spin lacks reality.

Even Pauli ridiculed the idea of "spinning electron".

But in "s" orbital of Schrodinger's hydrogen, this electron spin is the **only** generator of magnetic moment.

So they had **no** choice but to accept this strange spin ( **Not** as real spinning and speed ).

*(Fig.3) The magnitude of electron spin is just equal to Bohr magneton*

In Stern-Gerlach experiment, they got some atoms through magnetic field to measure the magnitude of magnetic moment of each electron.

Surprisingly, the experiments showed that the magnitude of magnetic moment of electron spin is just **equal** to Bohr magneton in Bohr's classical orbit ( this p.4 )

We can safely say Stern-Gerlach experiment proved the magnetic property in Bohr's orbit ( **Not** unreaslitic spin ! )

*(Fig.4) Spin-spin magnetic energy (= 0.0001 eV ) vs. bond energy (= 4.5 eV )*

You may hear spin is tiny magnet with the magnitude of Bohr magneton.

We **cannot** see unreal spin itself, we just measure its magnetism by experiments.

We can *replace* unrealistic spin by real orbital motion causing the **same** magnetic field. "Spin" without other motions **cannot** explain actual phenomena.

Spin-spin *magnetic* interaction is too weak to explain actual ferromagnet.

See this p.6 this p.7. So spin model **failed** from the beginning.

Hydrogen molecular bond energy is known to be as large as **4.5** eV which electrons spin's magnetic energy (= only **0.0001** eV ! ) can **NEVER** reach.

*(Fig.5) ↓ Spin magnetism has nothing to do with molecules !*

Electron spin was originally defined as "tiny **magnet**", though its "spinning" speed far exceeds light speed c.

Its spin-spin *magnetic* interaction is **too weak** to explain actual phenomena such as Pauli exclusion principle and ferromagnetism.

So too weak spin has nothing to do with molecular bond ! In fact, spin is used only as "mark"
to distinguish different spectra, **ignoring** its actual magnetic property.

*(Fig.6) Directions of magnetic field are the opposite in different places. *

Here we explain why spin-spin magnetic interaction is **impossible**.

Because the total magnetic energy by spin-spin is always **canceled** out to be **zero**.

Magnetic source always includes a pair of N and S poles, which generates magnetic field lines around it.

To retuen from N to S pole, the magnetic field must include two **opposite** directions ( upward and downward ).

Suppose two spins are always "*up*" and "*up*". In Fig.6 left, spin direction is the **same** as magnetic field caused by another spin, but the **opposite** in Fig.6 right.

So total magnetic energy in spin-spin always becomes **zero**, in any spin directions.

*(Fig.7) Ethene carbon double bond ( H2-C=C-H2 ) is NOT "pi" bond !*

Quantum mechanics claims that carbon double bond ( C=C ) is caused by pi bond between two **parallel** electrons.

But in fact, this "pi bond" model in quantum mechanics **cannot** form actual stable bond, because two *negative* electrons **repel** and avoid each other !

So orbitals of these two repulsive electrons tend to **avoid** lining up side by side parallel to each other ! This model **doesn't** describe reality.

*(Fig.8) Huckel method in pi bond is "empirical" using experimental data.*

Huckel theory is famous as calculating method in molecular double ( pi ) bond. But in fact, this Huckel theory invented in 1930s is **useless**, *cannot* predict any values.

Huckel method just adjusts free parameters artificially to fit experimental data. So Huckel is empirical, NOT ab-initio method.

**Choosing** parameters as we like means this Huckel method has **NO** ability to predict any values useful for us. Quantum mechanics remains useless.

*(Fig.9) So they just choose "fake" trial function, NOT predicting values.*

Schrodinger equation cannot be solved in multi-electron atoms except for one-electron hydrogen atom.

So all physicists can do is choose approximate trial function. The problem is there is **NO** restriction in choosing this trial function as candidate.

We can **choose** convenient form of trial wavefunction out of **infinite** choices. So it's impossible to compare infinite possible trial functions giving the lowest energy.

This is the reason why Schrodinger equation is useless, has **NO** power to predict physical values forever, also in DFT and Nobel prize.

*(Fig.10) Choosing approximate wavefunction from "infinite" choices !*

Here we explain why Schrodinger equation in quantum mechanics is **useless** forever. First, there is **NO** exact solution in multi-electron atoms.

So they just *pick up* some approximate wavefunction from **infinite** candidates, and **adjusting** their parameters to lower energy.

To find the lowest energy, we have to compare all possible (= **infinite** ) trial functions ! It's impossible ( this last ).

So after all, they just **choose** convenienet approximate functions ( ~ only 6 terms, this p.13 ), which is far from **unknown** "exact" values.

These trial wavefunctions are NOT true solution, because they cannot satisfy total energy conservation law in any positions.

*(Fig.11) No exact solution → just choose "fake" wavefunction → endless guess.*

Quantum mechanics is **deadlocked**, remains useless forever, because it **cannot** escape from the **old** process of "solving Schrodinger equation".

But Schrodinger equation in multi-electron atoms **cannot** be solved. Physicists just **choose** approximete (= fake ) solution function out of **infinite** candidates.

Of course, it's impossible to try all possible forms of wavefunctions, so this quantum mechanical method is *deadlocked*, forever.

Furthermore, quantum trial functions have **NO** clear orbital **picture** in multi-electron atoms.

What can we do, if we can use clear orbital picture in atoms based on two postulates of Coulomb force and de Broglie wave ?

It will be much easier for us to develop and find more effective and useful new computational ways, which **old** quantum mechanics prevents !

*(Fig.12) We must use experimental data to predict "real concept" !*

In the present quantum mechanics, even when we get some new experimental **data**, we **cannot** use them to clarify real mechanisms !

Instead, quantum mechanics forces us to use these data to create **artificial** quasiparticle, effective mass .. So our science stops its progress.

This is a very *serious* problem. We must address it immediately not to increase more educational victims under **false** science.

*(Fig.13) Coulomb energy conservation and an integer times de Broglie wavelength.*

It's quite natural that if we **keep** basic postulates, we **can** predict any physical values ( with the help of modern *computer* ).

These two postulates are Coulomb energy conservation ( in **any** electrons' positions ) and an **integer** times de Broglie wavelength generating Pauli force.

There is **No** way other than computing each Coulomb force and changing electrons' position in orthodox way to *keep* the single **common** ground state energy.

Of course, to obey an integer times de Broglie wave rule, this computing method using concrete orbits is the **only** one.

So the first thing for researchers to do is determine the more precise electronic motion model step by step, **comparing** experiments and the model's prediction.

I'm sure this realistic model based on two postulates will contribute to **curing**
fatal diseases such as cancer, ALS, dementia someday.

2016/6/24 updated. Feel free to link to this site.