$ sudo apt-get update
$ sudo apt-get install debichem-semiempirical 

debichem-semiempirical is installed in your system.

Make ensure the debichem-semiempirical package were installed using the commands given below,

$ sudo dpkg-query -l | grep debichem-semiempirical *

You will get with debichem-semiempirical package name, version, architecture and description in a table

debichem-semiempirical package basic information: