I want to do some theoretical electronics calculation with the help of Gaussian. How should I start?? Please help me in this regard???

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Fernando Vallejos-Burgos Popular answer

Books are always a good start.

For example:

Foresman & Frisch "Exploring Chemistry With Electronic Structure Methods: A Guide to Using Gaussian" 2nd edition, 1996, ISBN: 0963676938 [amazon.com link: http://a.co/79tIAjg]
Foresman & Frisch "Exploring Chemistry With Electronic Structure Methods: A Guide to Using Gaussian" 3rd edition, 2015, ISBN: 1935522035 [amazon link: http://a.co/8PVtWsz]

The newer version is much better since due to updating functionals, use of color, and much more detailed/didactic explanations.

Other books (that I have knowledge of) are not focused in Gaussian.

Fernando Vallejos-Burgos

Himanshu Mishra

Thank You So much Fernando......

Andrea M. Oyarzún

"Exploring Chemistry With Electronic Structure Methods: A Guide to Using Gaussian is indeed a great start". Supplementary information is also available at http://expchem3.com/

Khidhir Alhameedi

Agree with Fernando Vallejos-Burgos and Andrea M. Oyarzún.

It is good in general for start and learning.

Ajay Khanna

In Addition to the above answers,

For Basics and Understanding Gaussian Software and On How to Start Gaussian Calculations Please follow the links below, hope this will help:

https://www.youtube.com/user/IaNuisha

https://www.youtube.com/watch?v=OgqK93uwW5c

https://www.youtube.com/watch?v=QHQTSSAtRDU

https://www.youtube.com/playlist?list=PLIb-QH4aa5VVZFqYTFtBXUg9IEpZ3DPnR

https://www.youtube.com/channel/UCAR-pk6675HSiNyZKN9cfqA/playlists

https://www.youtube.com/watch?v=EGhPsDjeTw0

Thank You

Thank You all for your generous help.