Synthesis and Spectroscopic Studies of 4-butanoyl-3-methyl-1-phenylpyrazol-5-one and its Manganese (II), Lanthanum (III), Zirconium (III), Vanadium (V) and Tungsten (VI) Complexes

Ehirim, A.I.C., Elenwoke, U.E., Ogwuegbu, M.O.C.