Explain the following : Silicon forms SiF_6^(2-)ion whereas corresponding fluoro compound of carbon is not known.

Explain the following : Silicon forms SiF_6^(2-)ion whereas correspon

1.	Explain the following : Silicon forms SiF_6^(2-)ion whereas corresponding fluoro compound of carbon is not known.
Answer» Solution :Silicon has vacant d-orbital in its valence shell due to which it can accommodate 6 electrons from 6 FLUORINE ATOMS whereas carbon does not have d orbital and cannot EXPAND its COVALENCE beyond four.