Ascorbic acid decomposition into oxalate ions: a simple synthetic route towards oxalato-bridged heterometallic 3d–4f clusters

Abstract

Two types of oxalato-bridged heterometallic 3d-4f dodeca- and hexanuclear compounds have been obtained by connecting six bi- and, respectively, trinuclear moieties through oxalato bridges arising from the slow decomposition of the L-ascorbic acid.

Three Ln(III)-2,3,5-trichlorobenzoate coordination polymers (Ln = Tb, Ho and Er): Syntheses, structures and magnetic properties

“…The Tb-O bond lengths are in normal range [9]. As shown in [10,11]. Meanwhile, Further analysis of the crystal packing reveals that there is no inter-molecular weak interactions in the polymers 1-3.…”

Heterometallic Complexes Containing the NiII-LnIII-NiII Moiety—Structures and Magnetic Properties

“…The susceptibility data obey the Curie-Weiss law with negative Weiss constant θ = −5.01 K and Curie constant 7.34 cm 3 K mol −1 . Ligand H2L 24 (Scheme 3) was used to prepare the hexanuclear complex [{Ni2(L 24 )Gd(H2O)4}2(C2O4)3] (147) which is built by two almost linear Ni2Gd subunits (Ni-Gd-Ni = 178.6°) bridged by an oxalate ligand coordinated to the Gd III ions (Figure 17) [53]. The Ni II ions are hosted into the 1,3-diketonate compartments of the two ligands, in O6 octahedral coordination completed by two aqua ligands.…”

Vitamin C

“…Most of the vitamin C drawbacks were reported during oral uptake. They include diarrhea, abdominal pain [13], renal stones [123,124] and enamel erosion during chewing [160].…”