This book gives the detailed information regarding metal complexes, metal complexes forming reagents and there different studies. Research of this field can use for their knowledge for literature review 2-Hydroxy-4-isobutoxy acetophenone oxime is a good chelating agent. Now a day complex forming (chelating) agents are becoming important in measurement. New type of complex and complex formatting agents is constantly under investigation for possible analytical and industrial application. The structure of the complexes is determined by various physico-chemical analysis as well as spectral analysis. From above analysis we can conclude that complexes can be used as a good analytical agent in gravimetric study and colorimetric study of few metal ions.