First example of a trimeric metalloporphyrin. Synthesis, electrochemical, and spectroelectrochemical studies of [(P)Th(OH)2]3 where P is the dianion of octaethyl- or tetraphenylporphyrin. Crystal structure of a dihydrated trinuclear complex of dihydroxy(5,10,15,20-tetraphenylporphinato)thorium(IV) heptane solvate

Two Three‐Dimensional Actinide–Silver Heterometallic Coordination Polymers Based on 2,2′‐Bipyridine‐3,3′‐dicarboxylic Acid with Helical Chains Containing Dimeric or Trimeric Motifs

“…The Th1 and Th2 atoms are both connected with five carboxyl oxygen atoms from four different bpdc 2– ligands, two oxygen atoms from a nitrate anion, two µ 2 ‐OH bridging atoms, and one µ 3 ‐O bridging atom (µ 3 ‐OH group of O5 for Th1 and µ 3 ‐O group of O13 for Th2, Figure a–b). These two types of trimeric thorium secondary building blocks are rarely observed for actinides . In 2 , this trimeric thorium‐containing structure exists in very acidic solution (pH 1.32 after the hydrothermal treatment) and is stabilized by the bpdc 2– ligands and Ag I ions.…”

“…In general, uranyl and thorium(IV) carboxylates with condensed polynuclear units are often found at relatively high pH values, whereas mononuclear motifs tend to be observed in solids that crystallize at very low pH values. [3b], [7b], [8b], To construct UO 2 2+ and Th 4+ compounds with polynuclear motifs, some base or buffer solution may be employed in the reaction system. [3b], [8b], [8c], For example, Thuery reported the synthesis of [(UO 2 ) 2 (C 2 O 4 ) 2 (OH)Na(H 2 O) 2 ], which was obtained by neutralizing the carboxylic acid with NaOH.…”

“…[3b], [7b], [8b], To construct UO 2 2+ and Th 4+ compounds with polynuclear motifs, some base or buffer solution may be employed in the reaction system. [3b], [8b], [8c], For example, Thuery reported the synthesis of [(UO 2 ) 2 (C 2 O 4 ) 2 (OH)Na(H 2 O) 2 ], which was obtained by neutralizing the carboxylic acid with NaOH. [7d] Masci et al observed a pyrazine dicarboxylic acid stabilized uranyl dimer by employing an excess of CsOH.…”

Structural Diversity of F‐Element Monophthalocyanine Complexes

“…The three Pc rings have bowl‐shaped conformations, with dihedral angles between isoindolene quadrants of 12.64–28.73° and Dy III centres that sit 1.268, 1.273, and 1.360 Å out of their respective Pc planes. Although no such trinuclear PcM‐based clusters are known, a related porphyrin‐containing structure, [(TPP)Th(OH) 2 ] 3 , has been reported, as well as simpler dinuclear PcM‐based μ‐oxo derivatives of the form [(L)PcTM‐ O ‐TMPc(L)] (TM=Ti, Cr, Mn, and Fe) and Pc‐free clusters of lanthanide hydroxides . The CV of Li(PcDy) 3 (OH) 4 (H 2 O) in THF shows two irreversible reduction peaks at −0.6 and −0.95 V, assigned to ring reduction to Pc 3− and Pc 4− , respectively, lower than compared to PcDyCl (−0.2 V and −0.6 V), and a reversible ring‐oxidation peak at 0.6 V.…”

New thorium(iv)–arsonates with a [Th8O13]6+ octanuclear core

“…We will describe the octanuclear core in 1 as representative. As illustrated in figure 1, Th(1) is edge-sharing with three Th (2) 6 ] unit can be isolated as in 1, or interconnected by bridging sulfonate groups of the organic ligands via Th-O-S-O-Th bridges into 1D chain (as in 2) or 2D layer (as in 3). Also a number of aqua ligands are needed to fill the vacant coordination sites of the Th(IV) atoms in all three compounds.…”