Parallel orientation lower in energy than antiparallel orientation

1. Jun 16, 2006

asdf1

Why is the parallel orientation slightly lower in energy than the anitiparallel orientiation?

2. Jun 16, 2006

Staff: Mentor

What is the context of your question?

3. Jun 16, 2006

Gokul43201

Staff Emeritus
Because $-cos(0) < -cos(2\pi)$

4. Jun 17, 2006

arunbg

Slight typo there Gokul, because $-cos(0) < -cos(\pi)$

5. Jun 18, 2006

asdf1

thank you very much!

6. Jun 19, 2006

Gokul43201

Staff Emeritus
Gah, yes of course.

However, the point I was trying to convey was that the question needed to be more specific for the answer to be meaningful.

7. Jun 29, 2006

asdf1

ok~ sorry about that~

8. Jun 29, 2006

HallsofIvy

Don't just say you are sorry- be more specific! What is the context of the question? What is it that is "parallel" or "anti-parallel" and what energy are you talking about?