In the preparation of compounds of , Bartlett had taken
as a base compound. This is because
(i) both and
has the same size.
(ii) both and
has the same electron gain enthalpy.
(iii) both and
has almost same ionisation enthalpy.
(iv) both and
are gases
The answer is the option (iii). The ionization enthalpy of is nearly equal to that of
, because of which Barlett chose
compounds as base.