Dear Tarek Hammad
You can easily build a molecular structure with the Avogadro GUI

https://avogadro.cc/

and preoptimize it with its built-in force field.

If your molecule has a lot of conformers/rotamers you should find and sort them to identify the global minimum. An excellent and easy to use tool is CREST

https://crest-lab.github.io/crest-docs/

which uses a semiempirical tight-binding engine

https://xtb-docs.readthedocs.io/en/latest/

to perform the task.

HTH
Giuseppe

Quoting Tarek Hammad <[email protected]>:

Dear all

How can I obtain the atomic coordinates for single molecules??? for solid state, It is well known for me.

Thanks a lot in advance.

Tarek Hammad.

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GIUSEPPE MATTIOLI
CNR - ISTITUTO DI STRUTTURA DELLA MATERIA
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_______________________________________________
The Quantum ESPRESSO community stands by the Ukrainian
people and expresses its concerns about the devastating
effects that the Russian military offensive has on their
country and on the free and peaceful scientific, cultural,
and economic cooperation amongst peoples
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Quantum ESPRESSO is supported by MaX (www.max-centre.eu)
users mailing list [email protected]
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