Tricaesium dimolybdate(VI) bromide

Abstract

The title compound, Cs3(Mo2O7)Br, was synthesized by the reaction of CsNO3, MoO3 and 1-ethyl-3-methyl­imidazolium bromide. Its crystal structure is isotypic with K3(Mo2O7)Br and contains (MoO4)2− tetra­hedra which share an O atom to produce a [Mo2O7]2− dimolybdate(VI) anion with a linear bridging angle and m2 symmetry. The anions are linked by Cs atoms (site symmetry m2), forming sheets parallel to (001). Br atoms (site symmetry m2) are also part of this layer. Another type of Cs atom (3m site symmetry) is located in the inter­layer space and connects the layers via Cs—O and Cs—Br inter­actions into a three-dimensional array.

Supercubooctahedron (Cs6Cl)2Cs5[Ga15Ge9Se48] Exhibiting Both Cation and Anion Exchange

“…The elemental analyses also confirmed the presence of Br (see the Supporting Information, Figure S3b). Besides, the CsBr bond lengths of 2 3.461(1)–3.492(3) Å were close to those in Cs 3 (Mo 2 O 7 )Br (3.427(6)–3.694(3) Å)34 and Cs 2 Ru(NO)Br 4 (H 2 O)Br(H 2 O) 3 (3.464–3.890 Å) 35. The CsX bond lengths, which increased from 1 (3.398(3)–3.474(3) Å) to 2 (3.461(1)–3.492(3) Å), were similar as those found in Cs[Cu 3 (CN) 3 X] (X=Cl, Br; 3.462(1)–3.496(1 Å)36 and Cs 2 [Pt(CN) 4 X 2 ] (X=Cl, Br; 3.628–3.984 to 3.705–3.987 Å) 37.…”

Reactivity of FeMoO4 in CsCl Fluxes and Formation of the Salt-Inclusion Type of Compounds

“…Furthermore, we present insights into the formation and structural data of a mixed substitution series of the salt-inclusion type of dimolybdates, A 2 Mo 2 O 7 ·ACl (A = K, Rb, Cs). These compounds are isostructural with the reported potassium and cesium bromides , and confirm the existence of the chlorides, which have been reported without further structural characterization…”

“…The phase mixtures were evaluated by Rietveld refinements of ex situ X-ray diffraction data (see Figure ). The following reaction products were identified using referenced structural data: CsCl, Cs 2 Fe 2 (MoO 4 ) 3 , which crystallizes in the langbeinite structure type, and the salt-inclusion adducts Cs 2 FeCl 4 ·CsCl , and Cs 2 Mo 2 O 7 ·CsCl, which are isotypic with the corresponding bromide . The formation of a dimolybdate is unexpected and will be further discussed below.…”

Yttrium(iii) oxomolybdates(vi) as potential host materials for luminescence applications: an investigation of Eu3+-doped Y2[MoO4]3 and Y2[MoO4]2[Mo2O7]

“…These two values agree fairly well with those in Cs 3 Br[Mo 2 O 7 ] (d(Mo 6+ -O 2À ) = 173 pm and 187 pm), which also contains linear [Mo 2 O 7 ] 2À anions in staggered conformation. 25 In addition, a fifth oxygen ligand symmetries for both sites: 1), thus the magnetic dipole transition 5 D 0 -7 F 1 is observed to be much weaker. It is also important to note that oxomolybdate(VI) groups themselves can also exhibit emissions at around 600 nm, however, as this luminescence is relatively weak, 26 it is certainly covered by the strong red emission of the Eu 3+ cations in the studied compounds, if present at all.…”