▁energy , ▁and ▁ 3 A ″ ▁is ▁a ▁triple t ▁state ▁ 0 . 1 8   e V ▁higher . ▁The ▁Ar − O ▁bond ▁is ▁predicted ▁to ▁be ▁ 1 . 6 8 4   Å ▁long ▁and ▁to ▁have ▁a ▁force ▁constant ▁of ▁ 2 . 9 8 8 ▁m dy ne / Å 2 ▁( ). ▁ ▁Ar N H + ▁Ar N H + ▁is ▁a ▁possible ▁ion ic ▁mole c ule ▁to ▁detect ▁in ▁the ▁lab , ▁and ▁in ▁space , ▁as ▁the ▁atoms ▁that ▁compose ▁it ▁are ▁common . ▁Ar N H + ▁is ▁predicted ▁to ▁be ▁more ▁weak ly ▁bound ▁than ▁Ar OH + , ▁with ▁a ▁force ▁constant ▁in ▁the ▁Ar − N ▁bond ▁of ▁ 1 . 8 6 6 ▁m dy ne / Å 2 ▁( ). ▁The ▁angle ▁at ▁the ▁nit ro gen ▁atom ▁is ▁predicted ▁to ▁be ▁ 9 7 . 1 1 6 ° . ▁The ▁Ar − N ▁lengths ▁should ▁be ▁ 1 . 8 3 6   Å ▁and ▁the ▁N − H ▁bond ▁length ▁would ▁be ▁ 1 . 0 4 6   Å ▁ ▁Arg on ▁d init ro gen ▁c ation ▁The ▁arg on ▁d init ro gen ▁linear ▁c ation ic ▁complex ▁has ▁also ▁been ▁detected ▁in ▁the ▁lab : ▁Ar ▁+ ▁ ▁→ ▁▁ ▁Ar + ▁+ ▁N 2 . ▁The ▁dis soci ation ▁yields ▁Ar + , ▁as ▁this ▁is ▁a ▁higher - energy ▁state . ▁The ▁binding ▁energy ▁is