why among all the hexahalides formed by group 16 elements SF6 is more stable

 

Asked by Ritika Agrawal | 7th May, 2014, 06:08: PM

Expert Answer:

  • Among hexahalides, only hexahalides are stable compounds.
  • SF6 is extremely stable and chemically inert for stearic reasons.
  • In SF6, the six F atoms protect the sulphur atom from attack by reagents to such an extent that even thermodynamically most favourable reactions like hydrolysis donot occur.

            SF6   + H2O → No reaction

  • Hexahalides are not formed by chlorine, bromine and iodine.As the size of the halogen atom increases, the coordination numbner of the elements of this group decreases.
  • As a result, hexachlorides, hexabromides and hexaiodides are not known.

 

Answered by Vaibhav Chavan | 8th May, 2014, 09:28: AM

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