The structure of a cysteine complex of molybdenum(V): Na2Mo2O4[SCH2CH(NH2)CO2]2.5H2O

Knox, J. R.; Prout, C. K.

doi:10.1107/s0567740869004845

Cited by 84 publications

(11 citation statements)

References 2 publications

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“…However, as observed previously (Spence & Lee, 1965), this compound is silent in electron paramagnetic resonance, which may be attributed to the formation of an Mo-Mo bond (Spence & Lee, 1965;Melby, 1969). In general, the molecular structure of (I) is similar to that of the previously reported dinuclear molybdenum l-cysteinate (Knox & Prout, 1969).…”

Section: Commentsupporting

confidence: 83%

Di-μ-oxo-bis[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

Meng

et al. 2005

Acta Cryst E

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In the title dinuclear complex, [Mo2(C6H8N3O2)2O4]·3H2O, the Mo atoms, bridged by two μ‐oxo atoms, have a distorted octahedral coordination environment. Besides the two bridging O atoms, the coordination of each Mo atom is completed by a terminal oxo atom and a tridentate histidinate ligand. The short Mo⋯Mo distance of 2.5458 (4) Å may indicate the existence of an Mo—Mo metal bond. Intermolecular hydrogen bonding between the uncoordinated carboxylate O atoms and amino groups leads to a layer‐like arrangement of the molecules. The uncoordinated water molecules link these layers via O—H⋯O hydrogen bonds and help to stabilize the crystal packing.

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Section: Commentsupporting

confidence: 83%

Di-μ-oxo-bis[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

Meng

et al. 2005

Acta Cryst E

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“…6). Mo-O bond lengths in oxidized samples (Table 5) at 1.74-1.78 Å compare well with the double bonds in hexavalent molybdate at 1.78 Å , and they are distinctly shorter than both tetravalent Mo(IV)O 2 at 2.0 Å and pentavalent single bonded Mo-cysteine at 1.93 Å (Knox and Prout, 1969) (Fig. 7; Table S1).…”

Section: Oxidation Experiments With Reduced Mo Compoundsmentioning

confidence: 62%

Molybdenum reduction in a sulfidic lake: Evidence from X-ray absorption fine-structure spectroscopy and implications for the Mo paleoproxy

Dahl

Chappaz

Fitts

et al. 2013

Geochimica et Cosmochimica Acta

123

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“…The bonding to Mo may be described as sevencoordination, for there is a direct Mo--Mo bond (2.602 /~), not unlike the Mo-Mo distances ranging from 2.552 to 2-569 ~ in related di-g-oxo-complexes (Cotton & Morehouse, 1965;Knox & Prout, 1969;Delbaere & Prout, 1971;Drew & Kay, 1971).…”

Section: Di-g-oxo-bis[oxo(r/5-cyclopentadienyl)molybdenum(v)] Scattermentioning

confidence: 99%

Di-μ-oxo-bis[oxo(η⁵-cyclopentadienyl)molybdenum(V)]

Couldwell¹,

Prout²

1978

Acta Crystallogr Sect B

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Abstract. (rIs-CsHs)2Mo204, Cl0H1004Mo2, M r = 386.1, orthorhombic, a = 18.500 (3), b = 8.993 (2), c = 6.731 (1) A, U = 1119.8 A 3. Systematic extinctions: Okl, k + l = 2n + I; hk0, h = 2n + 1. Space group Pnma or Pn2~a; Pnma from structure analysis. D c = 2.29 g cm -3 for Z = 4, Mo Krt radiation, 2 = 0.71069 A, /t = 22 cm-k The structure contains discrete molecules of crystallographic point group symmetry C s, the mirror plane passing through the two cis terminal oxo ligands, the two Mo atoms and the centroid of each r/5-cyclopentadienyl ring. The two bridging O atoms complete the distorted octahedral coordination of each Mo atom.Introduetlon. Small brown hexagonal plates of (r/5-CsHs)zMo204 were kindly supplied by Dr M. L. H. Green and Mr M. Bunker. They were sensitive to air and moisture and were sealed under dry nitrogen in glass capillary tubes. It was not possible to measure their density. After survey precession photography, the selected crystal was set up on a Nonius CAD-4F PDPS-controlled x geometry diffractometer; cell dimensions and the orientation matrix were obtained by a least-squares fit to the setting angles of 25 reflexions.The intensities of reflexions with sin 0/2 < 0.70 A-1 were measured by an o3/20 scan, a variable scan rate and an o3-scan angle of (1.00 + 0.35 tan 0) °. Mo Kct radiation was used with a graphite monochromator. Reflexions with I < 3a(I), where a(I) is the standard deviation based on simple counting statistics, were not included in subsequent calculations. Corrections were made for Lorentz and polarization effects, but not for absorption. A set of 1512 independent structure amplitudes was obtained.The structure was solved by Patterson and Fourier techniques, with full-matrix least-squares refinement. All non-H atoms had anisotropic temperature factors. Difference syntheses permitted the location of the H atoms in their expected positions. They were positioned geometrically (C-H = 1.0 A; Uis o = 0.05 A 2) and included in the structure factor calculations, their location being readjusted after each cycle. In the final stages an overall isotropic extinction parameter (109.5) was introduced (Larson, 1967). Each reflexion was assigned a weight w -l = 1 + (0. l lFol -1.5) 2, chosen to minimize the variation of w(IFol --IFcl) 2 with F o.

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The structure of a cysteine complex of molybdenum(V): Na₂Mo₂O₄[SCH₂CH(NH₂)CO₂]₂.5H₂O

Cited by 84 publications

References 2 publications

Di-μ-oxo-bis[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

Di-μ-oxo-bis[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

Molybdenum reduction in a sulfidic lake: Evidence from X-ray absorption fine-structure spectroscopy and implications for the Mo paleoproxy

Di-μ-oxo-bis[oxo(η⁵-cyclopentadienyl)molybdenum(V)]

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The structure of a cysteine complex of molybdenum(V): Na2Mo2O4[SCH2CH(NH2)CO2]2.5H2O

Cited by 84 publications

References 2 publications

Di-μ-oxo-bis[(histidinato-κ3N,N,O)oxomolybdenum(V)] trihydrate

Di-μ-oxo-bis[(histidinato-κ3N,N,O)oxomolybdenum(V)] trihydrate

Molybdenum reduction in a sulfidic lake: Evidence from X-ray absorption fine-structure spectroscopy and implications for the Mo paleoproxy

Di-μ-oxo-bis[oxo(η5-cyclopentadienyl)molybdenum(V)]

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The structure of a cysteine complex of molybdenum(V): Na₂Mo₂O₄[SCH₂CH(NH₂)CO₂]₂.5H₂O

Di-μ-oxo-bis[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

Di-μ-oxo-bis[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

Di-μ-oxo-bis[oxo(η⁵-cyclopentadienyl)molybdenum(V)]