# P orbital notation

1. May 21, 2013

### Hypersphere

Hi,

Reading http://rmp.aps.org/abstract/RMP/v70/i4/p1039_1 I've run into a notational question of atomic p orbitals. The authors use symbols like $p_\sigma$ and $p_\pi$. From their fig. 3 (attached), they do look like $p_x$ and $p_z$ orbitals, respectively, rather than anything close to σ or π bonds.

Is this just a common notational convention that I've somehow missed? And if so, what is the symbol for the third p orbital?

2. May 22, 2013

### DrDu

Where's the figure?

3. May 22, 2013

### Hypersphere

Here it is, I hope...

#### Attached Files:

• ###### porbitals.png
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4. May 22, 2013

### Staff: Mentor

They are the indeed $p_x$ and $p_z$orbitals. My guess is that they are using this notation to signify that the bond formed will be a $\sigma$ or $\pi$ bond.

5. May 22, 2013

### Hypersphere

Ah! Now that makes some sense. Thank you.