Speaker
Description
Our recent research focuses on the reactions of the Schiff base
2-(diphenylphosphino)benzaldehyde with 3-nitrophenylhydrazine, yielding the condensation product L, and its coordination behaviour with different transition metals. In an initial try we reacted L with CuBr2 (1:1 molar ratio) in a warm MeOH solution of CuBr2 and a warm CH2Cl2 solution of L. Upon cooling to room temperature dark orange crystals were obtained. Their analysis (FT-IR and single-crystal X-ray diffraction) confirmed a oxidation of L to Lox had occurred (Figure 1). The purity of the product was verified by elemental analysis (C, H, N). Although coordination was not achieved, the obtained results allow for a comparative structural analysis of the unoxidized and oxidized ligand form, contributing to a better understanding of structure–property relationships. These insights will support the design of further ligands and their metal complexes with tailored characteristics.
Crystallographic data: monoclinic crystal system, C2/c, a = 30.7578(6), b = 9.2135(2), c = 21.2589(4) Å, β = 129.030(1), V = 4679.92(17) Å3, Z = 8. Refinement based on F2 (316 parameters): R1 = 0.0423, wR2 = 0.1004, S = 1.095, for all data, and R1 = 0.0370 for 4776 reflections with I ≥ 2σ(I).
Keywords: synthesis, single crystal X-ray study, FT-IR, elemental analysis, oxidation
