INTRODUCTION. Crown compounds have formed a rapidly expanding field of chemistry and found application in many areas. Authors have studied the coordination chemistry of a series of crown compounds, such as 18-C-6, DB-18-C-6, DB-30-C-10, 15-C-5 and B-15-C-5 in thiocyanate systems with M and M’ cations (M=Na~+, K~+, NH_4~+, Ca~(2+), Sr~(2+), Ba~(2+); M=Ni~(2+), Co~(2+), Zn~(2+), Ag~+, Mg~(2+)[1,2] This paper reports the IR characteristic and crystal structure of the complex of 18-C-6 with ammonium thiocyanate and palladium chloride. Authors have studied the coordination chemistry of a series of crown compounds, such as 18-C-6, DB-18-C-6, DB- 30-C-10, 15-C-5 and B-15-C-5 in thiocyanate systems with M and M ’cations (M = Na ~ +, K ~ +, NH 4 ~ +, Sr2 +, Ba2 +, M = Ni2 +, Co2 +, Zn2 +, Ag +, Mg2 + 2] This paper reports the IR characteristic and crystal structure of the complex of 18-C-6 with ammonium thiocyanate and palladium chloride.