Crystal structure of hydrogenbis(pyridine N-oxide) tetrachloroaurate-(III), revealing a short hydrogen bond

M. Sakhawat Hussain; Elmer O. Schlemper

doi:10.1039/DT9820000751

Crystal structure of hydrogenbis(pyridine N-oxide) tetrachloroaurate-(III), revealing a short hydrogen bond

M. Sakhawat Hussain^*
, Elmer O. Schlemper

^*Corresponding author for this work

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

28 Scopus citations

Abstract

An X-ray diffraction study of the title compound [H(pyo) ₂][AuCl₄] (pyo = pyridine N-oxide) was done to investigate the dimeric cation [H(pyo)₂]⁺ with a short hydrogen bond. The compound crystallizes in the triclinic space group P1 and has lattice parameters a = 7.276(6), b = 8.631(3), c = 6.799(8) Å, α = 105.4(3), β = 96.4(3), and γ = 67.9(2)°. The structure was solved both by the direct method and by the heavy-atom method using a CAD-4 SDP system. The final value for R(F₀) was 0.044 for 1 343 unique reflections. The structure consists of discrete [AuCl₄]^- anions and [H(pyo)₂]⁺ cations with the gold and the bridging hydrogen atoms located at centres of symmetry. The hydrogen bond is symmetric as a result of crystallographic requirements. Two pyridine N-oxide molecules are hydrogen-bonded to form the planar dimeric cation, [H(pyo)₂] ⁺. The [AuCl₄]^- anion has no bonded interaction with any adjacent anion or cation, indicating four-co-ordinated planar gold. The O⋯O distance [2.41(1) Å] is within the usual range observed for short hydrogen bonds. The structure of this compound, its spectral data, and its comparison with the structures of known compounds having similar dimeric cations are of significance because of the importance of gold complexes in chrysotherapy (gold treatment).

Original language	English
Pages (from-to)	751-755
Number of pages	5
Journal	Journal of the Chemical Society, Dalton Transactions
Issue number	4
DOIs	https://doi.org/10.1039/DT9820000751
State	Published - 1982
Externally published	Yes

Bibliographical note

Funding Information:
spectra of the solids [H(pyo),][AuCld and[H(ONC5H,(N0,)}~[AuC1,] in KBr showed v(N0) at1 215 and 1 225 cm-l compared to the corresponding bandat 1243 cm-l in pure pyridine N-oxide. The broadbands centred around 800 cm-l were observed in all threecompounds indicating the presence of the O-H-0hydrogen bond. A weak, broad band at 3430 cm-lobserved in all three compounds is probably due tomoisture.Some help from Mr. Martin Dawson in obtaining spectraldata is acknowledged. Financial support from the NationalScience Foundation (Grant CHE-77-08325) and from theUniversity of Petroleum and Minerals is gratefully acknow-ledged.[ 1 / 1454 Received, 1 7th September, 198 11REFERENCESJ. Emsley, Chem. SOC.

ASJC Scopus subject areas

General Chemistry

Access to Document

10.1039/DT9820000751

Cite this

@article{7d6b833af3164c7bbf841e522af3eded,

title = "Crystal structure of hydrogenbis(pyridine N-oxide) tetrachloroaurate-(III), revealing a short hydrogen bond",

abstract = "An X-ray diffraction study of the title compound [H(pyo) 2][AuCl4] (pyo = pyridine N-oxide) was done to investigate the dimeric cation [H(pyo)2]+ with a short hydrogen bond. The compound crystallizes in the triclinic space group P1 and has lattice parameters a = 7.276(6), b = 8.631(3), c = 6.799(8) {\AA}, α = 105.4(3), β = 96.4(3), and γ = 67.9(2)°. The structure was solved both by the direct method and by the heavy-atom method using a CAD-4 SDP system. The final value for R(F0) was 0.044 for 1 343 unique reflections. The structure consists of discrete [AuCl4]- anions and [H(pyo)2]+ cations with the gold and the bridging hydrogen atoms located at centres of symmetry. The hydrogen bond is symmetric as a result of crystallographic requirements. Two pyridine N-oxide molecules are hydrogen-bonded to form the planar dimeric cation, [H(pyo)2] +. The [AuCl4]- anion has no bonded interaction with any adjacent anion or cation, indicating four-co-ordinated planar gold. The O⋯O distance [2.41(1) {\AA}] is within the usual range observed for short hydrogen bonds. The structure of this compound, its spectral data, and its comparison with the structures of known compounds having similar dimeric cations are of significance because of the importance of gold complexes in chrysotherapy (gold treatment).",

author = "Hussain, \{M. Sakhawat\} and Schlemper, \{Elmer O.\}",

note = "Funding Information: spectra of the solids [H(pyo),][AuCld and[H(ONC5H,(N0,)\}\textasciitilde{}[AuC1,] in KBr showed v(N0) at1 215 and 1 225 cm-l compared to the corresponding bandat 1243 cm-l in pure pyridine N-oxide. The broadbands centred around 800 cm-l were observed in all threecompounds indicating the presence of the O-H-0hydrogen bond. A weak, broad band at 3430 cm-lobserved in all three compounds is probably due tomoisture.Some help from Mr. Martin Dawson in obtaining spectraldata is acknowledged. Financial support from the NationalScience Foundation (Grant CHE-77-08325) and from theUniversity of Petroleum and Minerals is gratefully acknow-ledged.[ 1 / 1454 Received, 1 7th September, 198 11REFERENCESJ. Emsley, Chem. SOC. ",

year = "1982",

doi = "10.1039/DT9820000751",

language = "English",

pages = "751--755",

journal = "Journal of the Chemical Society, Dalton Transactions",

issn = "1472-7773",

publisher = "Royal Society of Chemistry",

number = "4",

}

TY - JOUR

T1 - Crystal structure of hydrogenbis(pyridine N-oxide) tetrachloroaurate-(III), revealing a short hydrogen bond

AU - Hussain, M. Sakhawat

AU - Schlemper, Elmer O.

N1 - Funding Information: spectra of the solids [H(pyo),][AuCld and[H(ONC5H,(N0,)}~[AuC1,] in KBr showed v(N0) at1 215 and 1 225 cm-l compared to the corresponding bandat 1243 cm-l in pure pyridine N-oxide. The broadbands centred around 800 cm-l were observed in all threecompounds indicating the presence of the O-H-0hydrogen bond. A weak, broad band at 3430 cm-lobserved in all three compounds is probably due tomoisture.Some help from Mr. Martin Dawson in obtaining spectraldata is acknowledged. Financial support from the NationalScience Foundation (Grant CHE-77-08325) and from theUniversity of Petroleum and Minerals is gratefully acknow-ledged.[ 1 / 1454 Received, 1 7th September, 198 11REFERENCESJ. Emsley, Chem. SOC.

PY - 1982

Y1 - 1982

N2 - An X-ray diffraction study of the title compound [H(pyo) 2][AuCl4] (pyo = pyridine N-oxide) was done to investigate the dimeric cation [H(pyo)2]+ with a short hydrogen bond. The compound crystallizes in the triclinic space group P1 and has lattice parameters a = 7.276(6), b = 8.631(3), c = 6.799(8) Å, α = 105.4(3), β = 96.4(3), and γ = 67.9(2)°. The structure was solved both by the direct method and by the heavy-atom method using a CAD-4 SDP system. The final value for R(F0) was 0.044 for 1 343 unique reflections. The structure consists of discrete [AuCl4]- anions and [H(pyo)2]+ cations with the gold and the bridging hydrogen atoms located at centres of symmetry. The hydrogen bond is symmetric as a result of crystallographic requirements. Two pyridine N-oxide molecules are hydrogen-bonded to form the planar dimeric cation, [H(pyo)2] +. The [AuCl4]- anion has no bonded interaction with any adjacent anion or cation, indicating four-co-ordinated planar gold. The O⋯O distance [2.41(1) Å] is within the usual range observed for short hydrogen bonds. The structure of this compound, its spectral data, and its comparison with the structures of known compounds having similar dimeric cations are of significance because of the importance of gold complexes in chrysotherapy (gold treatment).

AB - An X-ray diffraction study of the title compound [H(pyo) 2][AuCl4] (pyo = pyridine N-oxide) was done to investigate the dimeric cation [H(pyo)2]+ with a short hydrogen bond. The compound crystallizes in the triclinic space group P1 and has lattice parameters a = 7.276(6), b = 8.631(3), c = 6.799(8) Å, α = 105.4(3), β = 96.4(3), and γ = 67.9(2)°. The structure was solved both by the direct method and by the heavy-atom method using a CAD-4 SDP system. The final value for R(F0) was 0.044 for 1 343 unique reflections. The structure consists of discrete [AuCl4]- anions and [H(pyo)2]+ cations with the gold and the bridging hydrogen atoms located at centres of symmetry. The hydrogen bond is symmetric as a result of crystallographic requirements. Two pyridine N-oxide molecules are hydrogen-bonded to form the planar dimeric cation, [H(pyo)2] +. The [AuCl4]- anion has no bonded interaction with any adjacent anion or cation, indicating four-co-ordinated planar gold. The O⋯O distance [2.41(1) Å] is within the usual range observed for short hydrogen bonds. The structure of this compound, its spectral data, and its comparison with the structures of known compounds having similar dimeric cations are of significance because of the importance of gold complexes in chrysotherapy (gold treatment).

UR - https://www.scopus.com/pages/publications/37049101081

U2 - 10.1039/DT9820000751

DO - 10.1039/DT9820000751

M3 - Article

AN - SCOPUS:37049101081

SN - 1472-7773

SP - 751

EP - 755

JO - Journal of the Chemical Society, Dalton Transactions

JF - Journal of the Chemical Society, Dalton Transactions

IS - 4

ER -

Crystal structure of hydrogenbis(pyridine N-oxide) tetrachloroaurate-(III), revealing a short hydrogen bond

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this