▁g ases ▁with ▁their ▁negative ▁electron ▁aff inity . ▁However , ▁the ▁ 2 0 1 7 ▁discovery ▁of ▁" sup ere lect roph il ic ▁an ions ", ▁gas ▁phase ▁fragment ation ▁products ▁of ▁clos o - d ode c abor ates , ▁led ▁to ▁the ▁observation ▁of ▁stable ▁an ionic ▁comp ounds ▁containing ▁a ▁bor on - no ble ▁gas ▁bond ▁with ▁significant ▁degree ▁of ▁c oval ent ▁interaction . ▁The ▁most ▁re active ▁sup ere lect roph il ic ▁an ion ▁[ B 1 2 ( CN ) 1 1 ] -, ▁fragment ation ▁product ▁of ▁cy an ated ▁cluster ▁[ B 1 2 ( CN ) 1 2 ] 2 -, ▁was ▁reported ▁to ▁bind ▁arg on ▁sp ont ane ously ▁at ▁room ▁temperature . ▁ ▁Sol id ▁comp ounds ▁Arm and ▁G aut ier ▁noticed ▁that ▁rock ▁contained ▁arg on ▁( and ▁also ▁nit ro gen ) ▁that ▁was ▁liber ated ▁when ▁the ▁rock ▁was ▁dissol ved ▁in ▁acid ▁however ▁how ▁the ▁arg on ▁was ▁combined ▁in ▁rock ▁was ▁ignored ▁by ▁the ▁scientific ▁community . ▁ ▁Full er ene ▁sol v ates ▁Sol id ▁bu ck min ster full er ene ▁has ▁small ▁spaces ▁between ▁the ▁C 6 0 ▁balls . ▁Under ▁ 2 0 0   MP a ▁pressure ▁and ▁ 2 0 0   ° C ▁heat ▁for ▁ 1 2 ▁hours , ▁arg on ▁can ▁be ▁inter cal ated ▁into ▁the ▁solid ▁to ▁form ▁cry st all ine ▁Ar 1 C 6 0 . ▁Once