The Crystal Structure of Rubidium Dichromate, Rb2Cr2O7(C2/c).

Löfgren, Percy; Rosenqvist, Einar; Åse, Kjell; Omfeldt, Marianne; Lagerlund, Inger; Ehrenberg, L.

doi:10.3891/acta.chem.scand.25-0035

Cited by 16 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The angles are all effectively tetrahedral, the differences probably not being significant. In these respects, the dichromate ions are identical to other dichromate ions whose structures have already been determined (Brandon & Brown, 1968;Panagiotopoulos & Brown, 1970;Kharitanov, Kuz'min & Belov, 1970;Lofgren & Waltersson, 1971;). The two bridging Cr-O-Cr angles are identical (131 o) and are well within the ranges of values (I 22-138 °) found in other dichromates.…”

Section: Discussionsupporting

confidence: 67%

The crystal structure of β-Na2Cr2O7

Panagiotopoulos¹,

Brown²

1972

Acta Crystallogr Sect B

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 67%

The crystal structure of β-Na2Cr2O7

Panagiotopoulos¹,

Brown²

1972

Acta Crystallogr Sect B

View full text Add to dashboard Cite

“…The Cr–O–Cr bridges in the Cr 2 O 7 2– ligands are not symmetric [Cr–O(CrO 3 ), 1.703(4) and 1.722(8) Å; O 3 Cr–O(Cr), 1.824(8) and 1.834(8) Å]. This is in contrast with the free dichromate anion that contains an essentially symmetrical Cr–O–Cr bridge [1.77(1) Å] . Therefore, two resonance forms, A and B (Scheme ), may be used to describe the bonding of the dichromate ligands in 6 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Structure of a Bismuth(III)/Chromium(VI) Oxo Cluster Containing a Bi₄Cr₄O₁₂Core

Wang

Williams

et al. 2011

Inorg. Chem.

View full text Add to dashboard Cite

Bismuth(III) compounds containing the Kläui's oxygen tripodal ligand [CpCo{P(O)(OEt)(2)}(3)](-) (L(OEt)(-)) have been synthesized, and their interactions with dichromate in aqueous media were studied. The treatment of Bi(5)O(OH)(9)(NO(3))(4) with NaL(OEt) in water afforded [L(OEt)Bi(NO(3))(2)](2) (1), whereas that of BiCl(3) with NaL(OEt) in CH(2)Cl(2) yielded L(OEt)BiCl(2) (2). Chloride abstraction of 2 with AgX afforded [L(OEt)BiX(2)](2) [X(-) = triflate (OTf(-)) (3), tosylate (OTs(-)) (4)]. In aqueous solutions at pH > 4, 4 underwent ligand redistribution to give the bis(tripod) complex [(L(OEt))(2)Bi(H(2)O)][OTs] (5). The treatment of 4 with Na(2)Cr(2)O(7) in acetone/water afforded the Bi(III)/Cr(VI) oxo cluster [(L(OEt))(4)Bi(4)(μ(3)-CrO(4))(2)(μ(3)-Cr(2)O(7))(2)] (6) containing a unique Bi(4)Cr(4)O(12) oxometallic core. Compound 6 oxidized benzyl alcohol to give ca. 6 equiv of benzaldehyde. The reaction between 2 and CrO(3) yielded [L(OEt)Bi(OCrO(2)Cl)](2)(μ-Cl)(2) (7). The crystal structures of complexes 4-7 have been determined.

show abstract

Chromium Compounds

Page¹,

Loar²

2000

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

Chromium compounds and their important uses are described. Chemical properties of the low valence compounds, Cr(‐II) through Cr(I), and those of Cr(IV) and Cr(V) are discussed as are those of the commercially important oxidation states of Cr(II), Cr(III), and Cr(VI). Sodium chromate and dichromate production from imported chromite ore, and the production of other chromates, dichromates, and chromic acid are summarized. The manufacture of water‐soluble trivalent compounds is also given. Regulations concerning shipments, specifications, and analytical test methods are discussed as are the health and safety factors of chromium compounds. The environmental impact and waste management practices of chromium compounds is also of importance. Chromium compounds of various oxidation states are used commercially as pigments, in metal finishing, leather tanning, drilling muds, and in wood preservation. Chromium compounds are also used in alloys, batteries catalists, photosensitive gels, and as reagent grade chemicals.

show abstract

The Crystal Structure of Rubidium Dichromate, Rb2Cr2O7(C2/c).

Cited by 16 publications

References 0 publications

The crystal structure of β-Na2Cr2O7

The crystal structure of β-Na2Cr2O7

Synthesis and Structure of a Bismuth(III)/Chromium(VI) Oxo Cluster Containing a Bi₄Cr₄O₁₂Core

Chromium Compounds

Contact Info

Product

Resources

About

The Crystal Structure of Rubidium Dichromate, Rb2Cr2O7(C2/c).

Cited by 16 publications

References 0 publications

The crystal structure of β-Na2Cr2O7

The crystal structure of β-Na2Cr2O7

Synthesis and Structure of a Bismuth(III)/Chromium(VI) Oxo Cluster Containing a Bi4Cr4O12Core

Chromium Compounds

Contact Info

Product

Resources

About

Synthesis and Structure of a Bismuth(III)/Chromium(VI) Oxo Cluster Containing a Bi₄Cr₄O₁₂Core