pa ired ▁orb ital ▁with ▁zero ▁bond ing ▁energy ▁( a ▁non - b ond ing ▁orb ital ). ▁For ▁this ▁orb ital , ▁the ▁coefficients ▁on ▁the ▁atomic ▁sites ▁can ▁be ▁written ▁down ▁without ▁calculation : ▁the ▁coefficient ▁on ▁all ▁the ▁orbit als ▁belonging ▁to ▁the ▁smaller ▁( unst ar red ) ▁set ▁are ▁ 0 , ▁and ▁the ▁sum ▁of ▁the ▁coefficients ▁of ▁the ▁( star red ) ▁orbit als ▁around ▁them ▁must ▁also ▁be ▁ 0 . ▁Simple ▁algebra ▁allows ▁the ▁assignment ▁of ▁all ▁coefficients ▁and ▁then ▁normal ize ▁them . ▁This ▁procedure ▁perm its ▁the ▁prediction ▁of ▁react ivity ▁patterns ▁and ▁can ▁be ▁explo ited ▁to ▁calculate ▁D ew ar ' s ▁react ivity ▁numbers ▁for ▁all ▁sites . ▁ ▁References ▁▁ ▁Category : The oret ical ▁chem istry ▁Category : M ole cular ▁physics <0x0A> </s> ▁X HR MO - FM ▁is ▁a ▁non com mer cial ▁radio ▁station ▁on ▁ 8 8 . 1 ▁FM ▁in ▁Herm os illo , ▁Son ora . ▁The ▁station ▁is ▁owned ▁by ▁Dem oc rac ia ▁y ▁D eli ber ación ▁Des ért ica , ▁A . C . ▁and ▁features ▁a ▁cultural ▁format ▁known ▁as ▁La ▁V oz ▁del ▁Pit ic . ▁ ▁History ▁X HR MO - FM ▁was ▁one ▁of ▁four ▁stations ▁awarded ▁simultaneously ▁by ▁the ▁I FT ▁in ▁Herm os illo ▁on ▁December ▁ 1 9 , ▁ 2 0 1 7 , ▁to ▁resolve ▁permit ▁applications ▁file d ▁prior ▁to ▁ 2 0 1 4 .