7195-89-3Relevant academic research and scientific papers
Thermal behaviour of mandelic acid, sodium mandelate and its compounds with some bivalent transition metal ions
Gomes,Caires,Lima,Gigante,Ionashiro
, p. 16 - 21 (2012/05/07)
Characterization, thermal stability and thermal decomposition of transition metal mandelates, M(C6H5CH(OH)CO2)2 (M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), as well as the thermal behaviour of mandelic acid C6H5CH(OH)CO2H and its sodium salt were investigated employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), TG-DSC coupled to FTIR, infrared spectroscopy (FTIR), elemental analysis and complexometry. All the compounds were obtained in the anhydrous state and the thermal decomposition occurs in two or four consecutive steps. The final residue up to 320°C (Mn), 345°C (Fe), 400°C (Co), 405°C (Ni), 355°C (Cu) and 575°C (Zn) is Mn3O4, Fe2O3, Co3O 4, NiO, CuO and ZnO, respectively. The results also provided information concerning the ligand's denticity, thermal behaviour and identification of gaseous products evolved during the thermal decomposition of these compounds.
Syntheses, structures and magnetic properties of layered metal(II) mandelates
Beghidja, Adel,Hallynck, Sylvain,Welter, Richard,Rabu, Pierre
, p. 662 - 669 (2007/10/03)
A series of MnII, FeII, CoII, Ni II and CuII layered mandelates has been synthesised in the form of crystalline powders by a hydrothermal route. The five compounds are isostructural with the copper analogue, also obtained in a single crystal form, except that the latter shows a strong Jahn-Teller distortion of the coordination spheres around the CuII centres. The complexes crystallise in the monoclinic centrosymmetric space group P21/α and their structures consist of layers of six-coordinate metal(II) ions interconnected through carboxylato bridges in a diamond-like network. The magnetic data indicate very small antiferromagnetic in-plane couplings for 1, 2, 3 and 5, with J/kB = -0.122 K for 1. The NiII compound 4 exhibits ferromagnetic coupling within the layers (J/kB = +1.213 K) and ferromagnetic 3D ordering can be observed at Tc = 2.7 K. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.
