Thermally stable dinuclear Co(II) and Zn(II) complexes of tetra-phosphonate and 2,2′-bipyridine

Hui Ling Sung; Zhi Jia Hu; Chong You Chen; Jing Yun Wu

doi:10.1016/j.ica.2020.119750

Thermally stable dinuclear Co(II) and Zn(II) complexes of tetra-phosphonate and 2,2′-bipyridine

Hui Ling Sung^*, Zhi Jia Hu, Chong You Chen, Jing Yun Wu

^*Corresponding author for this work

Department of Chemistry

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

9 Citations (Scopus)

Abstract

Two dinuclear phosphonate-based transition metal complexes, [Co₂(H₆tpmb)₂(2,2′-bipy)₂(H₂O)₂] (1) and [Zn₂(H₆tpmb)₂(2,2′-bipy)₂] (2), have been synthesized at 60 °C by the reactions of 1,2,4,5-tetrakis(phosphorylmethyl)benzene (H₈tpmb) and 2,2′-bipyridine (2,2′-bipy) ligands, with CoCl₂·6H₂O and Zn(NO₃)₂·6H₂O, respectively. These two complexes are characterized by single-crystal X-ray diffraction, XRD, IR and elemental analysis. Complexes 1 and 2 both adopt dinuclear macrocycle structures in which the Co(II) center in the former has an octahedral coordination geometry of {CoN₂O₄} while the Zn(II) center in the latter shows a square pyramidal coordination geometry of {ZnN₂O₃} with a τ value of 0.01. The H₈tpmb ligand adopting the cis,trans,cis,trans conformation was partially deprotonated to be the H₆tpmb²⁻ dianion in both complexes 1 and 2. TG analysis shows that complexes 1 and 2 both are thermally stable upon heating to 250 °C.

Original language	English
Article number	119750
Journal	Inorganica Chimica Acta
Volume	510
DOIs	https://doi.org/10.1016/j.ica.2020.119750
Publication status	Published - 2020 Sept 24

Keywords

22′-bipyridine
Cobalt
Phosphonate
Zinc

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.ica.2020.119750

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title = "Thermally stable dinuclear Co(II) and Zn(II) complexes of tetra-phosphonate and 2,2′-bipyridine",

abstract = "Two dinuclear phosphonate-based transition metal complexes, [Co2(H6tpmb)2(2,2′-bipy)2(H2O)2] (1) and [Zn2(H6tpmb)2(2,2′-bipy)2] (2), have been synthesized at 60 °C by the reactions of 1,2,4,5-tetrakis(phosphorylmethyl)benzene (H8tpmb) and 2,2′-bipyridine (2,2′-bipy) ligands, with CoCl2·6H2O and Zn(NO3)2·6H2O, respectively. These two complexes are characterized by single-crystal X-ray diffraction, XRD, IR and elemental analysis. Complexes 1 and 2 both adopt dinuclear macrocycle structures in which the Co(II) center in the former has an octahedral coordination geometry of {CoN2O4} while the Zn(II) center in the latter shows a square pyramidal coordination geometry of {ZnN2O3} with a τ value of 0.01. The H8tpmb ligand adopting the cis,trans,cis,trans conformation was partially deprotonated to be the H6tpmb2− dianion in both complexes 1 and 2. TG analysis shows that complexes 1 and 2 both are thermally stable upon heating to 250 °C.",

keywords = "22′-bipyridine, Cobalt, Phosphonate, Zinc",

author = "Sung, {Hui Ling} and Hu, {Zhi Jia} and Chen, {Chong You} and Wu, {Jing Yun}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = sep,

day = "24",

doi = "10.1016/j.ica.2020.119750",

language = "English",

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journal = "Inorganica Chimica Acta",

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T1 - Thermally stable dinuclear Co(II) and Zn(II) complexes of tetra-phosphonate and 2,2′-bipyridine

AU - Sung, Hui Ling

AU - Hu, Zhi Jia

AU - Chen, Chong You

AU - Wu, Jing Yun

PY - 2020/9/24

Y1 - 2020/9/24

N2 - Two dinuclear phosphonate-based transition metal complexes, [Co2(H6tpmb)2(2,2′-bipy)2(H2O)2] (1) and [Zn2(H6tpmb)2(2,2′-bipy)2] (2), have been synthesized at 60 °C by the reactions of 1,2,4,5-tetrakis(phosphorylmethyl)benzene (H8tpmb) and 2,2′-bipyridine (2,2′-bipy) ligands, with CoCl2·6H2O and Zn(NO3)2·6H2O, respectively. These two complexes are characterized by single-crystal X-ray diffraction, XRD, IR and elemental analysis. Complexes 1 and 2 both adopt dinuclear macrocycle structures in which the Co(II) center in the former has an octahedral coordination geometry of {CoN2O4} while the Zn(II) center in the latter shows a square pyramidal coordination geometry of {ZnN2O3} with a τ value of 0.01. The H8tpmb ligand adopting the cis,trans,cis,trans conformation was partially deprotonated to be the H6tpmb2− dianion in both complexes 1 and 2. TG analysis shows that complexes 1 and 2 both are thermally stable upon heating to 250 °C.

AB - Two dinuclear phosphonate-based transition metal complexes, [Co2(H6tpmb)2(2,2′-bipy)2(H2O)2] (1) and [Zn2(H6tpmb)2(2,2′-bipy)2] (2), have been synthesized at 60 °C by the reactions of 1,2,4,5-tetrakis(phosphorylmethyl)benzene (H8tpmb) and 2,2′-bipyridine (2,2′-bipy) ligands, with CoCl2·6H2O and Zn(NO3)2·6H2O, respectively. These two complexes are characterized by single-crystal X-ray diffraction, XRD, IR and elemental analysis. Complexes 1 and 2 both adopt dinuclear macrocycle structures in which the Co(II) center in the former has an octahedral coordination geometry of {CoN2O4} while the Zn(II) center in the latter shows a square pyramidal coordination geometry of {ZnN2O3} with a τ value of 0.01. The H8tpmb ligand adopting the cis,trans,cis,trans conformation was partially deprotonated to be the H6tpmb2− dianion in both complexes 1 and 2. TG analysis shows that complexes 1 and 2 both are thermally stable upon heating to 250 °C.

KW - 22′-bipyridine

KW - Cobalt

KW - Phosphonate

KW - Zinc

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DO - 10.1016/j.ica.2020.119750

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JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

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ER -

Thermally stable dinuclear Co(II) and Zn(II) complexes of tetra-phosphonate and 2,2′-bipyridine

Abstract

Keywords

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CCDC 1997185: Experimental Crystal Structure Determination

CCDC 1997184: Experimental Crystal Structure Determination

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Thermally stable dinuclear Co(II) and Zn(II) complexes of tetra-phosphonate and 2,2′-bipyridine

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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Datasets

CCDC 1997185: Experimental Crystal Structure Determination

CCDC 1997184: Experimental Crystal Structure Determination

Cite this