Xiang Lin

A novel left-handed double helicate constructed from l-tartrate bridged molybdenum(vi) and gadolinium(iii) atomsElectronic supplementary information (ESI) available: crystallographic data, TGA, powder X-ray patterns, ORTEP structure and molar susceptibility plot for compound 1. See http://www.rsc.org/suppdata/cc/b3/b301542d/

The one-dimensional double helicate, [NH4][Mo2O4Gd(H2O)6(L-C4H2O6)2] x 4H2O (1), which was synthesized by the reaction of GdCl3, L-tartaric acid and ammonium molybdate in acidified water solution, is built up by two heft-handed single-helical chains, linked up further by eight-coordinated GdIII pieces in an enantiopure left-handed double helical configuration, of which each helix is formed by L-tartrate bridged six-coordinated MoVI atoms.

Two new β-octamolybdate supported rare earth metal complexes: [NH4]2[{Gd(DMF)7}2(β-Mo8O26)][β-Mo8O26] and [NH4][La(DMF)7(β-Mo8O26)]

Abstract Two novel β-octamolybdate supported rare earth metal complexes, [NH4]2[{Gd(DMF)7(β-Mo8O26)}][β-Mo8O26] 1 and [NH4][La(DMF)7(β-Mo8O26)] 2, were obtained from the reaction of (NH4)6Mo7O24·4H2O with LnCl3 (Ln=Gd for 1 and La for 2) at low pH values in the mixed solvents of H2O/DMF or H2O/DMF/CH3CN. The single X-ray diffraction studies reveal that 1 consists of discrete centrosymmetric heterometallic decanuclear [{Gd(DMF)7}2-β-Mo8O26]2+, [β-Mo8O26]4− and two amino cations. In each decanuclear [{Gd(DMF)7}2-β-Mo8O26]2+ cation, the β-octamolybdate moiety is linked to two eight-coordinated GdIII cations, which is coordinated by seven DMF ligands and one terminal oxygen atom of molybdenum center. Compound 2 is built up from DMF coordinated LaIII fragment and β-octamolybdate unit joined together through two terminal oxygen atoms of two molybdenum atoms. Ferromagnetic behavior is observed for 1 from the magnetic measurement, which might result from the exchange interaction through the bridging β-[Mo8O26]4− ligand or the presence of zero-field splitting.

[Na4(H2O)7][Fe(OH)6Mo6O18]: A new [12] metallacrown-6 structure with an octahedrally coordinated iron at the center

The reaction of an aqueous solution of sodium molybdate with iron powder at low pH (∼0.184) gives rise to the formation of a six-member Mo ring-shape cluster with an Fe (II) encapsulated at the center, [Na4(H2O)7][Fe(OH)6Mo6O18](1), which is further linked to a remarkable three-dimensional network via sodium ions.

Synthesis and crystal structures of new triangle tungsten telluride compounds containing a [W3(μ3-Te)(μ2-Te2)3]4+ cluster core: {W3Te7[(RO)2PS2]3}I (R=Et, Pri)

Abstract Two complexes, W 3 Te 7 [(EtO) 2 PS 2 ] 3 I ( 1 ) and W 3 Te 7 [(Pr i O) 2 PS 2 ] 3 I ( 2 ), were prepared via solid state reaction of (RO) 2 PS 2 K with a product of high temperature reaction of elemental W, Te and I 2 . The structures of the two compounds have been determined by X-ray crystallography. Crystal data are 1 : monoclinic, P 2 1 / c , Z =4, a =14.3862(3), b =16.2114(1), c =18.9766(2) A, β =111.655(1)°, V =4113.37(10) A 3 , Z =4, D c =3.435 Mg/m 3 ; 2 : monoclinic, P 2 1 / n , Z =4, a =14.6197(3), b =23.9630(1), c =15.1249(3) A, β =113.688(1)°, V =4852.28(14) A 3 , Z =4, D c =3.027 Mg/m 3 . The results of both the complexes present the first examples of a cluster containing a [W 3 (μ 3 -Te)(μ 2 -Te 2 ) 3 ] 4+ core.

A new defective derivative of a ring-shaped nanosize polyoxomolybdate: synthesis and structure of Na28[MoVI112MoV28O427H14(H2O)56]ca. 300H2O

Abstract A new defective ring-shaped polyoxomolybdate Na 28 [ Mo VI 112 Mo V 28 O 427 H 14 ( H 2 O ) 56 ]· ca . 300 H 2 O was synthesized from an acidified aqueous solution of Na 2 MoO 4 ·2H 2 O with Na 2 S 2 O 3 ·5H 2 O or NH 2 NH 2 ·2HCl acting as reducing reagents. Its giant tire-like anion, which is formally based on the reported {Mo 154 }-type ring with removal of seven {Mo 2 } 2+ units at certain positions, is built up by fourteen {Mo 8 } units fused with fourteen {Mo 1 } units and seven {Mo 2 } 2+ units.

Syntheses and structures of two complexes with incomplete cuboidal Mo3Te44+ and Mo3(μ3-S)Te34+cluster cores

Abstract The reaction of tributylphosphine, benzoic acid and Mo 3 Te 7 (S 2 P(OPr i ) 2 ) 3 I produced a new compound with triangular cluster skeleton Mo 3 Te 4 4+ , Mo 3 Te 4 [S 2 P(OPr i ) 2 ] 3 (μ-PhCO 2 )PBu 3 ( 1 ). An unexpected compound including an Mo 3 Te 3 S 4+ skeleton, Mo 3 (μ 3 -S)Te 3 [S 2 P(OPr i ) 2 ] 3 (μ-PhNH 2 CO 2 )PBu 3 ( 2 ), was obtained using aminobenzoic acid instead of benzoic acid. X-ray crystallographic analysis revealed that these complexes belong to the Mo 3 E 4 4+ (E=S, Se, Te) incomplete cuboidal cluster family and are dimeric through the Te⋯Te interaction. 1 H and 31 P NMR and IR spectroscopic data were also used to characterize these compounds.

A novel acetated 54-member crown-shapedpolyoxomolybdate with unprecedented structural features:Na26[{Na(H2O)2}6({μ3-OH)4MoV20MoVI34O164(μ2-CH3COO)4}]·≈120H2O

The EPR silent acetated 54-member crown-shaped polyoxomolybdate Na26[{Na(H2O)2}6( {μ3-OH)4MoV20MoVI 34- O164(μ2-CH3COO)4}] ·≈120H2O (1), constructed from two different but related building blocks in a new mode, is synthesized in high yield by reducing an acidified aqueous solution of Na2MoO4·2H2O and CH3COONa·3H2O.