The synthesis and properties of the new indium inorganic azides Cl2InN3 and Br2InN3 and corresponding adducts with common Lewis bases such as tetrahydrofuran (THF) and pyridine are presented. The solid-state molecular structure of the Cl2InN3(THF)(2) compound reveals a dinuclear [Cl2InN3(THF)(2)](2) complex which incorporates a cyclic In2N2 core formed by bridging azide ligands (see illustration).