Naslov
Structural variety of isopropyl-bis(2- picolyl)amine complexes with zinc(II) and copper(II)

Autori
Pantalon Juraj, Natalija ; Muratović, Senada ; Perić, Berislav ; Šijaković Vujičić, Nataša ; Vianello, Robert ; Žilić, Dijana ; Jagličić, Zvonko ; Kirin, Srećko I.

Izvornik
Crystal growth & design (1528-7483) 20 (2020), 4; 2440-2453

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Cu(II) ; Zn(II) ; nitrogen ligands ; DFT calculations ; X-ray

Sažetak
A variety of structurally different complexes of the isopropyl-bis(2-picolyl)amine (iPr-bpa) ligand were prepared with ZnA2 and CuA2 salts (A = Br─, Br─/PF6─, BF4─/F─, ClO4─). The choice of different counterion affected the stoichiometry, coordination number, geometry and formation of geometrical isomers. Crystal structures of four Zn(II) complexes ; two monomers (mer-[Zn(iPr-bpa)Br2] and fac-[Zn(iPr- bpa)Br2]), one F─ bridged dimer ([Zn2(μ- F)2(iPr-bpa)2](BF4)2) and one ML2 complex ([Zn(iPr-bpa)2](ClO4)2) were determined, and their solution structures were studied by NMR spectroscopy. For the ML2 complex, relative stabilities of geometrical isomers were determined using DFT calculations. For Cu(II) complexes, five crystal structures were determined ; two monomers ([Cu(iPr-bpa)Br2] and [Cu(iPr-bpa)(ClO4)2(H2O)]), a Br─ bridged dimer ([Cu2(μ-Br)(Br)2(iPr-bpa)2](PF6) × CH3OH), a F─ bridged coordination polymer ([Cu(μ-F)(iPr- bpa)]n(BF4)n × nCH3OH), and a cyclic, CO32─ bridged trimer ([Cu3(tri-μ-CO3)(ClO4)3(iPr- bpa)3](ClO4)). The different crystallographic structures of Cu(II) complexes are reflected in their different magnetic properties investigated by ESR spectroscopy and magnetic susceptibility measurements.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA