In the title compound， [Cd(CHNO)Cl]， the coordination polyhedra around the Cd cations are distorted trigonal bipyramids. Two of the chloride ions (one axial and one equatorial) are bridging to the other metal atom， leading to a Cd⋯Cd separation of 3.9162 (4) Å. The O atom of the l-histidinium cation lies in an axial site. In the crystal， numerous N-H⋯Cl， N-H⋯O， C-H⋯O and C-H⋯Cl hydrogen bonds link the mol-ecules into a three-dimensional network. Theoretical calculations and spectroscopic data are available as supporting information.

X-ray diffraction，crystal structure，dinuclear cadmium compounds，electronic properties，hybrid materials，hydrogen b