▁T ▁shape . ▁Ar 2 Cl 2 ▁has ▁a ▁dist orted ▁t etra hed ron ▁shape , ▁with ▁the ▁two ▁arg on ▁atoms ▁ 4 . 1   Å ▁from ▁each ▁other , ▁and ▁their ▁axis ▁ 3 . 9   Å ▁from ▁the ▁Cl 2 . ▁The ▁van ▁der ▁Wa als ▁bond ▁energy ▁is ▁ 4 4 7   cm − 1 . ▁Ar 3 Cl 2 ▁also ▁exists ▁with ▁a ▁van ▁der ▁Wa als ▁bond ▁energy ▁of ▁ 7 7 6   cm − 1 . ▁ ▁The ▁linear ▁Ar · Br 2 ▁mole c ule ▁has ▁a ▁continuous ▁spectrum ▁for ▁b rom ine ▁mole c ule ▁X   →   B ▁trans itions . ▁The ▁spectrum ▁of ▁b rom ine ▁is ▁blue - shift ed ▁and ▁spread ▁out ▁when ▁it ▁bind s ▁an ▁arg on ▁atom . ▁ ▁Ar I 2 ▁shows ▁a ▁spectrum ▁that ▁adds ▁satellite ▁bands ▁to ▁the ▁higher ▁v ibr ational ▁bands ▁of ▁I 2 . ▁The ▁Ar I 2 ▁mole c ule ▁has ▁two ▁different ▁is om ers , ▁one ▁shape ▁is ▁linear , ▁and ▁the ▁other ▁is ▁T ▁sh aped . ▁The ▁dynamics ▁of ▁Ar I 2 ▁is ▁complex . ▁Break up ▁occurs ▁through ▁different ▁routes ▁in ▁the ▁two ▁is om ers . ▁The ▁T ▁shape ▁under go es ▁intr am ole cular ▁v ibr ational ▁relax ation , ▁whereas ▁the ▁linear ▁one ▁directly ▁breaks ▁apart . ▁D ii od ine ▁clusters , ▁I 2 Ar n ▁have ▁been ▁made . ▁ ▁The ▁Ar Cl