Abstract: The present invention relates to metal complexes and electronic devices, in particular organic electroluminescent devices such as OLEDs, containing said metal complexes. The following compounds of formula (1) are claimed: M(L)n(L?)m, the compound of general formula (1) containing a sub-structure M(L)n of formula (2) and L representing a mono-anionic ligand. Formula (2). The variables are defined as follows: M represents Cu, Ag, Au, Ru, Zn, Al, Ga or In; A represents a co-ordinating group which co-ordinates with M and can be substituted with one or more substituents R; the other variables are defined as cited in the claims.