Complex sentence: The interactions required for complex formation are donor-acceptor interactions, their strength is highly dependent on the ability of the donor to provide π-electron density-the complexation is the stronger the stronger the π-electron donor is.
Split into simpler sentences: The interactions required for complex formation are donor-acceptor interactions, their strength is highly dependent on the ability of the donor to provide π-electron density. This complexation is the stronger the stronger the π-electron donor is.