Synthesis and Structural Characterization of Molecular Dy(III) and Er(III) Tetra-Carbonates

Abstract

Single crystal structures of lanthanide carbonate and hydroxy-carbonate compounds have been previously reported in the literature, with the majority of these compounds being extended one- to three-dimensional compounds. Very few lanthanide compounds have been isolated that contain molecular moieties, and none have been reported for either erbium or dysprosium. Single crystals of the tetra-carbonate complexes, [C(NH(2))(3)](5)[Er(CO(3))(4)].11H(2)O (I) and [C(NH(2))(3)](4)[Dy(CO(3))(4)(H(2)O)](H(3)O).13H(2)O (II), were isolated from concentrated guanidinium carbonate solutions and characterized by single crystal X-ray diffraction studies. Compounds I and II are the first reported molecular carbonate structures for Er and Dy to be characterized via single crystal X-ray diffraction studies. Crystallographic data for I: monoclinic, space group P21/n, a = 8.8160(6) A, b = 21.0121(14) A, c = 19.6496(14) A, Z = 4. Data for II: tetragonal, space group P4/n, a = b = 15.3199(11) A, c = 7.5129(11) A, Z = 2.

Lanthanide Carbonates

“…The Ln-O bond lengths are presented in Table 1. They are comparable to those previously reported in the literature; [7,15,17] the Y-O bond lengths are intermediate between those of the Ho and Er crystals. The rest of the details of the data collection and the structure refinement are given in Tables S1 and S2.…”

Controlling Electron Spin Decoherence in Nd-based Complexes via Symmetry Selection

“…The coordinated water molecule is located on the quasi-C 4 axis with a longest Nd-O length (2.63 Å ). For 2, four guanidinium and one H 3 O + cations behave as charge-balanced ions, arranged around the anion, forming the hydrogen bonding with other ten water molecules in the crystal lattice, which is similar to the reported complex Goff et al, 2010) as supported by thermogravimetric analysis (Figure S2). The crystal of 2 is unstable in the air at the room temperature but is quite stable below the ice point, which can be attributed to the large amount of lattice water molecules in the crystal lattice.…”

“…Complexes 1 and 2 were synthesized according to a modified method reported with different rare-earth salts (Runde et al, 2000;Goff et al, 2010). The single crystal XRD reveals that 1 and 2 crystallize in the orthorhombic Pna2 1 and tetragonal P4/n space groups, respectively (Table S1).…”

Trends in Structure and Thermodynamic Properties of Normal Rare Earth Carbonates and Rare Earth Hydroxycarbonates

“…Most carbonate salt precipitation processes are conducted at ambient conditions in relatively short amounts of time. However, if the rare earth carbonate is allowed to remain in contact with aqueous alkali carbonate/bicarbonate salt solution, the carbonate will either hydrolyze to create hydroxycarbonate [100] or, more likely, create a double carbonate [36][37][38][39][40][41][42][101][102][103][104].…”