Finding STO3G Parameters for H,He,C,N,O

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Discussion Overview

The discussion centers around the search for parameters of the STO-3G basis set for the elements hydrogen, helium, carbon, nitrogen, and oxygen. The context includes computational chemistry and the use of basis sets in quantum mechanical calculations.

Discussion Character

  • Technical explanation, Homework-related

Main Points Raised

  • One participant requests parameters for the STO-3G basis set for specific elements.
  • Another participant provides a link to the EMSL basis set exchange for obtaining the parameters but critiques the STO-3G basis set as inadequate for realistic calculations.
  • The original requester acknowledges the limitations of STO-3G but states their intention to use it for writing a Hartree-Fock code.
  • A later reply expresses encouragement for the original requester's endeavor, framing it as a valuable exercise.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the utility of the STO-3G basis set; while one acknowledges its limitations, another expresses intent to use it for a specific purpose.

Contextual Notes

The discussion highlights the limitations of the STO-3G basis set, including its unsuitability for mimicking real molecules, but does not resolve the implications of these limitations for the intended use in coding.

aihaike
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Dear all,

I need the parameters for the STO3G basis set H,He,C,N,O.
Where can I get them?
Thanks,

Eric.
 
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at EMSL basis set exchange: https://bse.pnl.gov/bse/portal

But note that STO-3G is /NOT/ a real basis set, it cannot be used for any calculations which aim to mimic real molecules in some way or another (in other words: it is very very very bad, even for a minimal basis set). So unless you require it to debug an integral program or to reproduce some numbers from other people I would advice you to use a different one.
 
Yeah, I'm aware about that.
I'm just want to write a little HF code.
Thanks for the reply.
 
okay, great :]. Good luck, this is a great exercise.
 

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