Is there any Open Babel binary packages ready to be installed with DNF/YUM on CentOS systems?

The answer is yes and no, depending on which release of CentOS you are running.

If you are running CentOS 8.0, Open Babel binary packages are available:

fyicenter$ more /etc/system-release
CentOS Linux release 8.3.2011

fyicenter$ dnf search openbabel
openbabel.x86_64 : Chemistry software file format converter
openbabel-devel.x86_64 : Development tools for programs which will use the Open Babel library
openbabel-doc.noarch : Additional documentation for the Open Babel library
openbabel-gui.x86_64 : Chemistry software file format converter - GUI version
openbabel-libs.x86_64 : Chemistry software file format converter - libraries
perl-openbabel.x86_64 : Perl wrapper for the Open Babel library
python3-openbabel.x86_64 : Python wrapper for the Open Babel library
ruby-openbabel.x86_64 : Ruby wrapper for the Open Babel library

If you are running CentOS 7.0, no Open Babel binary packages are available:

fyicenter$ yum search babel 
  
=================================================== Name Exactly Matched: babel 
babel.noarch : Tools for internationalizing Python applications

================================================== Name & Summary Matched: babel 
libbabeltrace.i686 : Common Trace Format Babel Tower
libbabeltrace.x86_64 : Common Trace Format Babel Tower
texlive-babel-english.noarch : Babel support for English

======================================================= Name Matched: babel 
python2-babel.noarch : Library for internationalizing Python applications
python3-babel.noarch : Library for internationalizing Python applications
texlive-babel.noarch : Multilingual support for Plain TeX or LaTeX
texlive-babelbib.noarch : Multilingual bibliographies

So you need to find another way to install Open Babel on CentOS systems.

⇒ "DNF/YUM install" - Open Babel Binary Packages

⇐ Open Babel Installation Options on CentOS

⇑ Running Open Babel on CentOS

⇑⇑ Open Babel Tutorials