Abstract:

A comprehensive chemistry experiment was designed. In this article, the synthesis process of 2-hydroxy-1-naphthalene formaldehyde o-phenylenediamine Schiff base and its copper(Ⅱ) complex was successfully optimized. The composition of the above complex was determined by chemical and instrumental analysis, while the structure was characterized by FTIR and ¹H NMR. All of the experimental results are excellent. In general, this experiment could make up for the shortage in teaching synthesis of organometallic coordination compounds. From this experiment, students could consolidate and improve their basic experimental skills such as reflux, purification and centrifugation. They could master the principle and method of the molar ratio method to determine the coordination number and stability constant of complexes. Meanwhile they could understand how to characterize the molecule structure by spectroscopy. It is beneficial for cultivating students' ability to comprehensively apply organic chemistry, inorganic chemistry, chemical analysis and instrumental analysis knowledge to solve specific problems. Besides, it is also helpful for students to understand the properties and research trends of the Schiff base and its metal complexes, stimulating students' enthusiasm for scientific research, cultivating a systematic scientific thinking and research ability.

Key words: Schiff base, Organometallic complex, Complex composition, Comprehensive experiment