Hydrated and anhydrous cobalt (II) barbiturates: Crystal structures, spectroscopic and thermal properties

Nicolay N. Golovnev; Leonid A. Solovyov; Maxim K. Lesnikov; Sergey N. Vereshchagin; Victor V. Atuchin

doi:10.1016/j.ica.2017.07.002

Hydrated and anhydrous cobalt (II) barbiturates: Crystal structures, spectroscopic and thermal properties

Nicolay N. Golovnev, Leonid A. Solovyov, Maxim K. Lesnikov, Sergey N. Vereshchagin, Victor V. Atuchin

Физический факультет

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

14 Цитирования (Scopus)

Аннотация

Three new complexes of barbituric acid (H₂BA), a discrete molecular complex [Co(H₂O)₄(HBA)₂] (1), a barbiturate-bridged 1D Co(II) coordination polymer [Co(H₂O)₂(μ₂-HBA)₂] (2) and a 3D Co(II) coordination polymer [Co(μ₃-HBA)₂] (3) were synthesized and structurally characterized by X-ray powder diffraction. In 1–3, the HBA⁻ ions are coordinated to Co(II) only through O atoms with cobalt ions in an octahedral environment. In 1, Co(II) is coordinated to four terminal water molecules and two HBA⁻ ions. In compound 2, Co(II) is bonded to two terminal water molecules and two μ₂-HBA⁻ ions forming polymer chains. In the 3D-polymeric form 3, a bridging μ₃-HBA ligand is connected through three oxygen atoms of the carbonyl groups with three Co(II) ions. All three structures are stabilized by intermolecular hydrogen bonds and π–π stacking interactions between HBA⁻ ions. The IR spectroscopic data supports the results of the X-ray diffraction analysis. The thermal decomposition of the compounds comprises the dehydration steps and the organic ligand oxidation to form cobalt oxides.

Язык оригинала	английский
Страницы (с-по)	39-45
Число страниц	7
Журнал	Inorganica Chimica Acta
Том	467
DOI	https://doi.org/10.1016/j.ica.2017.07.002
Состояние	Опубликовано - 1 окт 2017

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10.1016/j.ica.2017.07.002

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@article{cd9bb1b9ceeb48dfa3c1b486da9c0e0a,

title = "Hydrated and anhydrous cobalt (II) barbiturates: Crystal structures, spectroscopic and thermal properties",

abstract = "Three new complexes of barbituric acid (H2BA), a discrete molecular complex [Co(H2O)4(HBA)2] (1), a barbiturate-bridged 1D Co(II) coordination polymer [Co(H2O)2(μ2-HBA)2] (2) and a 3D Co(II) coordination polymer [Co(μ3-HBA)2] (3) were synthesized and structurally characterized by X-ray powder diffraction. In 1–3, the HBA− ions are coordinated to Co(II) only through O atoms with cobalt ions in an octahedral environment. In 1, Co(II) is coordinated to four terminal water molecules and two HBA− ions. In compound 2, Co(II) is bonded to two terminal water molecules and two μ2-HBA− ions forming polymer chains. In the 3D-polymeric form 3, a bridging μ3-HBA ligand is connected through three oxygen atoms of the carbonyl groups with three Co(II) ions. All three structures are stabilized by intermolecular hydrogen bonds and π–π stacking interactions between HBA− ions. The IR spectroscopic data supports the results of the X-ray diffraction analysis. The thermal decomposition of the compounds comprises the dehydration steps and the organic ligand oxidation to form cobalt oxides.",

keywords = "Barbiturate, Cobalt, Spectroscopy, Structure, Synthesis, Thermal decomposition, POLYMERS, ANION, ACID-DERIVATIVES, CHROMOPHORES, CHEMISTRY, NI, METAL-COMPLEXES",

author = "Golovnev, {Nicolay N.} and Solovyov, {Leonid A.} and Lesnikov, {Maxim K.} and Vereshchagin, {Sergey N.} and Atuchin, {Victor V.}",

year = "2017",

month = oct,

day = "1",

doi = "10.1016/j.ica.2017.07.002",

language = "English",

volume = "467",

pages = "39--45",

journal = "Inorganica Chimica Acta",

issn = "0020-1693",

publisher = "Elsevier",

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Hydrated and anhydrous cobalt (II) barbiturates : Crystal structures, spectroscopic and thermal properties. / Golovnev, Nicolay N.; Solovyov, Leonid A.; Lesnikov, Maxim K.; Vereshchagin, Sergey N.; Atuchin, Victor V.

В: Inorganica Chimica Acta, Том 467, 01.10.2017, стр. 39-45.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - Hydrated and anhydrous cobalt (II) barbiturates

T2 - Crystal structures, spectroscopic and thermal properties

AU - Golovnev, Nicolay N.

AU - Solovyov, Leonid A.

AU - Lesnikov, Maxim K.

AU - Vereshchagin, Sergey N.

AU - Atuchin, Victor V.

PY - 2017/10/1

Y1 - 2017/10/1

N2 - Three new complexes of barbituric acid (H2BA), a discrete molecular complex [Co(H2O)4(HBA)2] (1), a barbiturate-bridged 1D Co(II) coordination polymer [Co(H2O)2(μ2-HBA)2] (2) and a 3D Co(II) coordination polymer [Co(μ3-HBA)2] (3) were synthesized and structurally characterized by X-ray powder diffraction. In 1–3, the HBA− ions are coordinated to Co(II) only through O atoms with cobalt ions in an octahedral environment. In 1, Co(II) is coordinated to four terminal water molecules and two HBA− ions. In compound 2, Co(II) is bonded to two terminal water molecules and two μ2-HBA− ions forming polymer chains. In the 3D-polymeric form 3, a bridging μ3-HBA ligand is connected through three oxygen atoms of the carbonyl groups with three Co(II) ions. All three structures are stabilized by intermolecular hydrogen bonds and π–π stacking interactions between HBA− ions. The IR spectroscopic data supports the results of the X-ray diffraction analysis. The thermal decomposition of the compounds comprises the dehydration steps and the organic ligand oxidation to form cobalt oxides.

AB - Three new complexes of barbituric acid (H2BA), a discrete molecular complex [Co(H2O)4(HBA)2] (1), a barbiturate-bridged 1D Co(II) coordination polymer [Co(H2O)2(μ2-HBA)2] (2) and a 3D Co(II) coordination polymer [Co(μ3-HBA)2] (3) were synthesized and structurally characterized by X-ray powder diffraction. In 1–3, the HBA− ions are coordinated to Co(II) only through O atoms with cobalt ions in an octahedral environment. In 1, Co(II) is coordinated to four terminal water molecules and two HBA− ions. In compound 2, Co(II) is bonded to two terminal water molecules and two μ2-HBA− ions forming polymer chains. In the 3D-polymeric form 3, a bridging μ3-HBA ligand is connected through three oxygen atoms of the carbonyl groups with three Co(II) ions. All three structures are stabilized by intermolecular hydrogen bonds and π–π stacking interactions between HBA− ions. The IR spectroscopic data supports the results of the X-ray diffraction analysis. The thermal decomposition of the compounds comprises the dehydration steps and the organic ligand oxidation to form cobalt oxides.

KW - Barbiturate

KW - Cobalt

KW - Spectroscopy

KW - Structure

KW - Synthesis

KW - Thermal decomposition

KW - POLYMERS

KW - ANION

KW - ACID-DERIVATIVES

KW - CHROMOPHORES

KW - CHEMISTRY

KW - NI

KW - METAL-COMPLEXES

UR - http://www.scopus.com/inward/record.url?scp=85026258110&partnerID=8YFLogxK

U2 - 10.1016/j.ica.2017.07.002

DO - 10.1016/j.ica.2017.07.002

M3 - Article

AN - SCOPUS:85026258110

VL - 467

SP - 39

EP - 45

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

SN - 0020-1693

ER -