A Trinuclear Niobium Cluster with Six Bridging Sulfates and Metal to Metal Bond Order of ⅔

Avi Bino

doi:10.1021/ic00135a042

A Trinuclear Niobium Cluster with Six Bridging Sulfates and Metal to Metal Bond Order of ⅔

Avi Bino^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Upon addition of K₂SO₄ to the red-brown solution produced by the electrochemical reduction of Nb(V) in 70% H₂SO₄, a red-brown, crystalline product is precipitated. X-ray crystallographic study has defined this substance as K₄(H₅O₂)-[Nb₃O₂(SO₄)₆(H2O)₃]-5H₂O. It crystallizes in the monoclinic space group P2₁ with the cell dimensions a = 9.961 (2) Å,b= 18.088 (3) Å c = 10.036 (2) Å, β = 118.84 (2)°, V= 1584 (1) Å³, and Z = 2. The structure was refined by full-matrtix least-squares methods to residuals of R₁ = 0.037 and R₂ = 0.044. It consists of a discrete trinuclear, triangular niobium cluster of the type M₃X₁₇ that has been found in metal clusters of group 6 elements. The three niobium atoms in the [Nb3O₂(SO₄)₆(H₂O)₃]^5- ion are triply bridged by two μ₃-O atoms, above and below the triangle plane, and each pair of Nb atoms is bridged by two μ-S0₄^2- groups. The trimer possesses a near D_3h symmetry. The mean Nb-Nb distance is 2.885 (7) Å, and the average oxidation state of the Nb atom is +3⅔. Four electrons occupy M-M bonding orbitals, resulting in a bond order of ⅔.

Original language	English
Pages (from-to)	1917-1920
Number of pages	4
Journal	Inorganic Chemistry
Volume	21
Issue number	5
DOIs	https://doi.org/10.1021/ic00135a042
State	Published - 1982

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@article{dc0213ba9ea344eda315504dcb4c5e85,

title = "A Trinuclear Niobium Cluster with Six Bridging Sulfates and Metal to Metal Bond Order of ⅔",

abstract = "Upon addition of K2SO4 to the red-brown solution produced by the electrochemical reduction of Nb(V) in 70\% H2SO4, a red-brown, crystalline product is precipitated. X-ray crystallographic study has defined this substance as K4(H5O2)-[Nb3O2(SO4)6(H2O)3]-5H2O. It crystallizes in the monoclinic space group P21 with the cell dimensions a = 9.961 (2) {\AA},b= 18.088 (3) {\AA} c = 10.036 (2) {\AA}, β = 118.84 (2)°, V= 1584 (1) {\AA}3, and Z = 2. The structure was refined by full-matrtix least-squares methods to residuals of R1 = 0.037 and R2 = 0.044. It consists of a discrete trinuclear, triangular niobium cluster of the type M3X17 that has been found in metal clusters of group 6 elements. The three niobium atoms in the [Nb3O2(SO4)6(H2O)3]5- ion are triply bridged by two μ3-O atoms, above and below the triangle plane, and each pair of Nb atoms is bridged by two μ-S042- groups. The trimer possesses a near D3h symmetry. The mean Nb-Nb distance is 2.885 (7) {\AA}, and the average oxidation state of the Nb atom is +3⅔. Four electrons occupy M-M bonding orbitals, resulting in a bond order of ⅔.",

author = "Avi Bino",

year = "1982",

doi = "10.1021/ic00135a042",

language = "אנגלית",

volume = "21",

pages = "1917--1920",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "5",

}

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T1 - A Trinuclear Niobium Cluster with Six Bridging Sulfates and Metal to Metal Bond Order of ⅔

AU - Bino, Avi

PY - 1982

Y1 - 1982

N2 - Upon addition of K2SO4 to the red-brown solution produced by the electrochemical reduction of Nb(V) in 70% H2SO4, a red-brown, crystalline product is precipitated. X-ray crystallographic study has defined this substance as K4(H5O2)-[Nb3O2(SO4)6(H2O)3]-5H2O. It crystallizes in the monoclinic space group P21 with the cell dimensions a = 9.961 (2) Å,b= 18.088 (3) Å c = 10.036 (2) Å, β = 118.84 (2)°, V= 1584 (1) Å3, and Z = 2. The structure was refined by full-matrtix least-squares methods to residuals of R1 = 0.037 and R2 = 0.044. It consists of a discrete trinuclear, triangular niobium cluster of the type M3X17 that has been found in metal clusters of group 6 elements. The three niobium atoms in the [Nb3O2(SO4)6(H2O)3]5- ion are triply bridged by two μ3-O atoms, above and below the triangle plane, and each pair of Nb atoms is bridged by two μ-S042- groups. The trimer possesses a near D3h symmetry. The mean Nb-Nb distance is 2.885 (7) Å, and the average oxidation state of the Nb atom is +3⅔. Four electrons occupy M-M bonding orbitals, resulting in a bond order of ⅔.

AB - Upon addition of K2SO4 to the red-brown solution produced by the electrochemical reduction of Nb(V) in 70% H2SO4, a red-brown, crystalline product is precipitated. X-ray crystallographic study has defined this substance as K4(H5O2)-[Nb3O2(SO4)6(H2O)3]-5H2O. It crystallizes in the monoclinic space group P21 with the cell dimensions a = 9.961 (2) Å,b= 18.088 (3) Å c = 10.036 (2) Å, β = 118.84 (2)°, V= 1584 (1) Å3, and Z = 2. The structure was refined by full-matrtix least-squares methods to residuals of R1 = 0.037 and R2 = 0.044. It consists of a discrete trinuclear, triangular niobium cluster of the type M3X17 that has been found in metal clusters of group 6 elements. The three niobium atoms in the [Nb3O2(SO4)6(H2O)3]5- ion are triply bridged by two μ3-O atoms, above and below the triangle plane, and each pair of Nb atoms is bridged by two μ-S042- groups. The trimer possesses a near D3h symmetry. The mean Nb-Nb distance is 2.885 (7) Å, and the average oxidation state of the Nb atom is +3⅔. Four electrons occupy M-M bonding orbitals, resulting in a bond order of ⅔.

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DO - 10.1021/ic00135a042

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AN - SCOPUS:4243867472

SN - 0020-1669

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SP - 1917

EP - 1920

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 5

ER -

A Trinuclear Niobium Cluster with Six Bridging Sulfates and Metal to Metal Bond Order of ⅔

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