NDLI: New Coordination Compounds of $Cu^{II}$ with Schiff Base Ligands—Crystal Structure, Thermal, and Spectral Investigations

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New Coordination Compounds of $Cu^{II}$ with Schiff Base Ligands—Crystal Structure, Thermal, and Spectral Investigations

Content Provider	MDPI
Author	Beata, Cristóvão Osypiuk, Dariusz Bartyzel, Agata
Copyright Year	2020
Description	The new mono-, di- and tetranuclear coordination compounds [Cu(HL1)]·H2O (1), [Cu2(L1)(OAc)(MeOH)]·2H2O·MeOH (2), [Cu4(L2)2(OAc)2]·4MeOH (3), and [Cu4(L2)2(OAc)2]·4H2O·4MeOH (4) were synthesized by the direct reaction of 2,2′-{(2-hydroxypropane-1,3-diyl)bis[nitrilomethylidene]}bis(4-bromo-6-methoxyphenol) (H3L1) or 2,2′-{(2-hydroxypropane-1,3-diyl)bis(nitriloeth-1-yl-1-ylidene)}diphenol (H3L2) and the Cu(II) salt. They were characterized by elemental analysis, X-ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, simultaneous thermal analysis and differential scanning calorimetry (TG/DSC), and thermal analysis coupled with Fourier transform infrared spectroscopy (TG-FTIR) techniques and the single crystal X-ray diffraction study. In the dinuclear complex 2, the copper(II) ions are bridged by an alkoxo- and a carboxylato bridges. The tetranuclear complexes 3 and 4 are formed from dinuclear species linkage through the phenoxo oxygen atoms of the fully deprotonated H3L2. Compounds 1–4 are stable at room temperature. During heating in air, at first, the solvent molecules (water and/or methanol) are lost and after that, the organic part undergoes defragmentation and combustion. The final decomposition solid product is CuO. The main gaseous products resulting from the thermal degradation of 1–4 in a nitrogen atmosphere were: H2O, MeOH, CH3COOH, CH4, C6H5OH, CO2, CO, and NH3.
Starting Page	1004
e-ISSN	20734352
DOI	10.3390/cryst10111004
Journal	Crystals
Issue Number	11
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-11-05
Access Restriction	Open
Subject Keyword	Crystals Inorganic Chemistry Schiff Base N,o-donor Ligand Complexes of Cu(ii) Crystal Structure Thermal Properties
Content Type	Text
Resource Type	Article

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