Microwave assisted solid state reaction synthesis of methionine complexes of iron (II)

Methionine complexes of iron (II) were synthesized by employing a simple and novel microwave assisted solid state route in a domestic microwave (MW) oven (2.45 GHz frequency, 700 W power) and six crucial reaction parameters were investigated on the basis of their individual effects on the yield of the synthesized compounds. Results suggest that optimal synthesis conditions are microwave irradiation time, 260 s; the airflow temperature, 100 °C; and the amount of reactant, 1.5 g. The synthesized compounds were characterized by infrared spectrometry. From the results of chemical analysis and infrared spectrometric analyses, the minimum molecular formula of the synthesized compounds could be determined as Fe(Met)2 · H2O, in which iron, nitrogen element and water account for 15.93%, 7.97% and 0.07%, respectively. The microwave method was found to be simple, fast and efficient, with high selectivity for the preparation of these compounds.