NOVELTY - Composition comprises at least one metal complex comprising at least one metal, at least one first ligand and one second ligand, where: the first ligand is a sigma donor to the metal and volatilizes upon heating the metal complex; the second ligand is different from the first ligand and also volatilizes upon heating the metal complex; the metal complex has a solubility at 25 degrees C of at least 100 mg/ml in at least one polar protic solvent; and the metal complex is a silver containing complex (I).    USE - The composition is useful in an ink, which is useful for producing a metallic conductive film, which is: in the form of a line or metal grid (all claimed); and useful for forming semiconductor devices (including transistors and FETs), electronics, printed electronics, flexible electronics, solar cells (including inverted solar cells), displays, screens, light weight devices, LEDs, organic LEDs, organic electronic devices, and fuel cells; and in radio-frequency identification, catalysis and biomedical applications.    ADVANTAGE - The composition: can be stored at 25 degrees C for at least 100 hours without substantial deposition of metal(0); provides a metallic conductive film having a conductivity of at least 1000 S/m (preferably at least 100000 S/m), and a work function that differs from the work function of the native metal by less than 25% (preferably by less than 5%); is substantially free of nanoparticles (claimed) including metal nanoparticles, colloidal material and flakes; does not use toxic or carcinogenic solvents; utilizes the metal complex that is free of fluorine atoms, free from metal-carbon bonding and is uncharged as whole; and provides metallic conductive film having low resistivity in a low cost manner with high quality.    DETAILED DESCRIPTION - Composition comprises at least one metal complex comprising at least one metal, at least one first ligand and one second ligand, where: the first ligand is a sigma donor to the metal and volatilizes upon heating the metal complex; the second ligand is different from the first ligand and also volatilizes upon heating the metal complex; the metal complex has a solubility at 25 degrees C of at least 100 mg/ml in at least one polar protic solvent; and the metal complex is a silver containing complex of formula (I).    R1 = alkyl (optionally substituted);    R2 = alkylene (optionally substituted) that together with the Ag and the two amine groups, forms a 4-, 5- or 6-membered ring; and    R3-R6 = H or polar-terminated alkyl.    INDEPENDENT CLAIMS are also included for:    (1) a method (M1) for producing a metallic conductive film, comprising depositing an ink on a substrate (where the ink comprises the composition), and reducing the composition to produce a metallic conductive film; and    (2) a method (M2) for making the composition, comprising reacting the metal complex comprising the metal and the second ligand with the first ligand.