A novel M3L2 type cage-like compound, [Ag3(titb)2](BF4)3, was synthesized by diffusion method between the 1,3,5-tris (imidazol-1- ylmethyl)-2,4,6-trimethylbenzene (titb) in ethanol and aqueous solution of [AgCH3CN)4]BF4. The compound crystallizes in the monoclinic space group C2/c with a=2.1794(3)nm, b=2.0201(4)nm, c=1. 4813(2)nm, β=128.600(10)°, V=5.0967(14)nm^3, Z=4,Dc=1.701g/cm^3, F (000)=2592, R=0.0379, wR2=0.0964. One of the BF4^- anion locates inside of the cage like a 'bird' while the others are outside of the cage.

Key words: SILVER COMPLEX, CAGE STRUCTURE, SUPERMOLECULAR STRUCTURE, CRYSTAL STRUCTURE