electron pair geometry: octahedral
molecular geometry: octahedral
SeF6 is a regular octahedron , all bond angles are 90 degrees
Selenium hexafluoride
BeCl2, SeF6 , CI4
becl2
Selenium fluorides are: SeF2, Se2F2, SeF4, SeF6.
F2ccf2
Selinium tetrafloride
All of the selenium fluoridesSeF4, SeF6, SeF2, and Se2F2 are covalent
7. Selenium hexafluoride is SeF6 , an octahedral molecule similar to SF6
The melting point of SeF6 is -34,6 oC, the boiling point is - 46,6 oC.
The elements in period 3 and above have d orbitals available for bonding which makes the "expansion" of the octet more likely. period 2 elements do not, the 2d shell has only s and p orbitals. P is in period 3, an example is PCl5 with 5 electron pairs. Se in period 4 can also expand its octet, an example is SeF6, with 6 electron pairs.
Sulfur hexachloride is an inorganic compound consisting of two different elements. The prefix hexa indicates that there are six chloride atoms. Thus, the formula is SCl6. Note that this compound does not obey the octet rule.