Abstract: A Cu(hfac) allyl-derived ligand precursor has been provided. The ligand includes group consisting of alkyl, phenyl, trialkylsilane, trialkoxylsilane, halodialkylsilane, dihaloalkylsilane, trihalosilane, triphenylsilane, alkoxyl, halogen, chloroformate, cynanide, cycloalkyl, cycloalkylamine, alkyl ether, isocyanate, and pentafluorobenzene. Examples of the allyl-derived ligand precursors have proved to be stable at room temperatures, and sufficiently volatile at higher temperatures. Copper deposited with this precursor has low resistivity and high adhesive characteristics. A synthesis method has been provided which produces a high yield of the above-described precursors, including a Cu(hfac)(allyltrimethylsilane) precursor.