Wydział Chemii

Beata Cristóvão

Julia Kłak

Barbara Miroslaw

2014

Journal of Coordination Chemistry

67

2728-2746

10.1080/00958972.2014.948432

Naukowa

Angielski

Artykuł

The heterodinuclear complexes [CuLnL(NO₃)₂(H₂O)₃MeOH]NO₃·MeOH (Ln = Ho (1), Tm (2), Yb (3), and Lu (4); L = N,N′-bis(5-bromo-3-methoxysalicylidene)propylene-1,3-diamine) have been synthesized and characterized by elemental analysis, FTIR, thermogravimetric (TG)/differential scanning calorimetry (DSC), TG-FTIR, single crystal X-ray diffraction studies, and magnetic measurements. The isostructural compounds crystallized in the monoclinic space group P2₁/n. The rare earth(III) cation is nine coordinate, whereas the coordination number for copper(II) is six. The complexes were stable at room temperature. The thermal decomposition products were mainly CH₃OH, H₂O, CH₃Br, NO_x (x = 1 or 2), CO₂, and CO. The magnetic properties of 1–3 were dominated by the crystal field effect on the Ln^III site, masking the magnetic interaction between the paramagnetic centers. The Cu^II–Lu^III pair in 4 showed no significant interaction, which is in accord with the diamagnetic nature of the ground state for lutetium(III).

The heterodinuclear compounds [CuLn(L)(NO₃)₂(H₂O)₃MeOH]NO₃·MeOH (where Ln = Ho (1), Tm (2), Yb (3), and Lu (4)) have been synthesized and characterized by elemental analysis, FTIR, TG/DSC, TG-FTIR, single crystal X-ray diffraction studies, and magnetic measurements. The complexes are isostructural and crystallize in the monoclinic space group P2₁/n. The magnetic properties of 1, 2, and 3 are dominated by the crystal field effect on the Ln^III site, masking the magnetic interaction between the paramagnetic centers.

http://dx.doi.org/10.1080/00958972.2014.948432