Copper(II)/di-2-pyridyl ketone chemistry: A triangular cluster displaying antisymmetric exchange versus an 1D coordination polymer

Constantinos G. Efthymiou; Catherine P. Raptopoulou; Vassilis Psycharis; Anastasios J. Tasiopoulos; Albert Escuer; Spyros P. Perlepes; Constantina Papatriantafyllopoulou

doi:10.1016/j.poly.2013.01.060

Copper(II)/di-2-pyridyl ketone chemistry: A triangular cluster displaying antisymmetric exchange versus an 1D coordination polymer

Constantinos G. Efthymiou
, Catherine P. Raptopoulou
, Vassilis Psycharis
, Anastasios J. Tasiopoulos
, Albert Escuer
, Spyros P. Perlepes
, Constantina Papatriantafyllopoulou

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

15 Citations (Scopus)

Abstract

The systematic study of the reaction system copper(II) perchlorate/di-2- pyridyl ketone, (py)₂CO, provided access to the new trinuclear compound [Cu₃{(py)₂C(OMe)(O)}₃(H ₂O)](ClO₄)₃·MeOH·0.6H ₂O (1·MeOH·0.6H₂O), and the 1D coordination polymer [Cu₂{(py)₂C(OEt)(O)}(HCO₂) ₂(ClO₄)(MeCN)]_n (2) bearing the anionic hemiketal forms of (py)₂CO. Both compounds were prepared from reactions of Cu(ClO₄)₂·6H₂O with the ligand, in the presence of NEt₃ in MeOH (1) or MeCN/TEOF (2), where TEOF is triethylorthoformate. Compound 1 possesses a triangular metal topology representing an example of a non-oxido/hydroxido/methoxido-centered Cu ₃ species. Compound 2 is based on dinuclear units linked through HCO₂^- groups forming an 1D chain. EPR spectra and variable temperature dc magnetic susceptibility studies on powdered polycrystalline samples of 1 revealed the presence of strong antiferromagnetic interactions between the metal centers leading to an S = 1/2 ground state. The magnetic susceptibility data were fit using a model including antisymmetric exchange interactions and the antisymmetric exchange vector parameter G_Z value has been determined.

Original language	English
Pages (from-to)	30-37
Number of pages	8
Journal	Polyhedron
Volume	64
DOIs	https://doi.org/10.1016/j.poly.2013.01.060
Publication status	Published - 2013
Externally published	Yes

Keywords

Antisymmetric exchange interaction
Copper(II) clusters
Copper(II) coordination polymers
Crystal structures
Di-2-pyridyl ketone
Magnetic properties

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10.1016/j.poly.2013.01.060

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@article{929034addcfa4f25afd93087c886bf4d,

title = "Copper(II)/di-2-pyridyl ketone chemistry: A triangular cluster displaying antisymmetric exchange versus an 1D coordination polymer",

abstract = "The systematic study of the reaction system copper(II) perchlorate/di-2- pyridyl ketone, (py)2CO, provided access to the new trinuclear compound [Cu3\{(py)2C(OMe)(O)\}3(H 2O)](ClO4)3·MeOH·0.6H 2O (1·MeOH·0.6H2O), and the 1D coordination polymer [Cu2\{(py)2C(OEt)(O)\}(HCO2) 2(ClO4)(MeCN)]n (2) bearing the anionic hemiketal forms of (py)2CO. Both compounds were prepared from reactions of Cu(ClO4)2·6H2O with the ligand, in the presence of NEt3 in MeOH (1) or MeCN/TEOF (2), where TEOF is triethylorthoformate. Compound 1 possesses a triangular metal topology representing an example of a non-oxido/hydroxido/methoxido-centered Cu 3 species. Compound 2 is based on dinuclear units linked through HCO2- groups forming an 1D chain. EPR spectra and variable temperature dc magnetic susceptibility studies on powdered polycrystalline samples of 1 revealed the presence of strong antiferromagnetic interactions between the metal centers leading to an S = 1/2 ground state. The magnetic susceptibility data were fit using a model including antisymmetric exchange interactions and the antisymmetric exchange vector parameter GZ value has been determined.",

keywords = "Antisymmetric exchange interaction, Copper(II) clusters, Copper(II) coordination polymers, Crystal structures, Di-2-pyridyl ketone, Magnetic properties",

author = "Efthymiou, \{Constantinos G.\} and Raptopoulou, \{Catherine P.\} and Vassilis Psycharis and Tasiopoulos, \{Anastasios J.\} and Albert Escuer and Perlepes, \{Spyros P.\} and Constantina Papatriantafyllopoulou",

year = "2013",

doi = "10.1016/j.poly.2013.01.060",

language = "English",

volume = "64",

pages = "30--37",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Copper(II)/di-2-pyridyl ketone chemistry

T2 - A triangular cluster displaying antisymmetric exchange versus an 1D coordination polymer

AU - Efthymiou, Constantinos G.

AU - Raptopoulou, Catherine P.

AU - Psycharis, Vassilis

AU - Tasiopoulos, Anastasios J.

AU - Escuer, Albert

AU - Perlepes, Spyros P.

AU - Papatriantafyllopoulou, Constantina

PY - 2013

Y1 - 2013

N2 - The systematic study of the reaction system copper(II) perchlorate/di-2- pyridyl ketone, (py)2CO, provided access to the new trinuclear compound [Cu3{(py)2C(OMe)(O)}3(H 2O)](ClO4)3·MeOH·0.6H 2O (1·MeOH·0.6H2O), and the 1D coordination polymer [Cu2{(py)2C(OEt)(O)}(HCO2) 2(ClO4)(MeCN)]n (2) bearing the anionic hemiketal forms of (py)2CO. Both compounds were prepared from reactions of Cu(ClO4)2·6H2O with the ligand, in the presence of NEt3 in MeOH (1) or MeCN/TEOF (2), where TEOF is triethylorthoformate. Compound 1 possesses a triangular metal topology representing an example of a non-oxido/hydroxido/methoxido-centered Cu 3 species. Compound 2 is based on dinuclear units linked through HCO2- groups forming an 1D chain. EPR spectra and variable temperature dc magnetic susceptibility studies on powdered polycrystalline samples of 1 revealed the presence of strong antiferromagnetic interactions between the metal centers leading to an S = 1/2 ground state. The magnetic susceptibility data were fit using a model including antisymmetric exchange interactions and the antisymmetric exchange vector parameter GZ value has been determined.

AB - The systematic study of the reaction system copper(II) perchlorate/di-2- pyridyl ketone, (py)2CO, provided access to the new trinuclear compound [Cu3{(py)2C(OMe)(O)}3(H 2O)](ClO4)3·MeOH·0.6H 2O (1·MeOH·0.6H2O), and the 1D coordination polymer [Cu2{(py)2C(OEt)(O)}(HCO2) 2(ClO4)(MeCN)]n (2) bearing the anionic hemiketal forms of (py)2CO. Both compounds were prepared from reactions of Cu(ClO4)2·6H2O with the ligand, in the presence of NEt3 in MeOH (1) or MeCN/TEOF (2), where TEOF is triethylorthoformate. Compound 1 possesses a triangular metal topology representing an example of a non-oxido/hydroxido/methoxido-centered Cu 3 species. Compound 2 is based on dinuclear units linked through HCO2- groups forming an 1D chain. EPR spectra and variable temperature dc magnetic susceptibility studies on powdered polycrystalline samples of 1 revealed the presence of strong antiferromagnetic interactions between the metal centers leading to an S = 1/2 ground state. The magnetic susceptibility data were fit using a model including antisymmetric exchange interactions and the antisymmetric exchange vector parameter GZ value has been determined.

KW - Antisymmetric exchange interaction

KW - Copper(II) clusters

KW - Copper(II) coordination polymers

KW - Crystal structures

KW - Di-2-pyridyl ketone

KW - Magnetic properties

UR - https://www.scopus.com/pages/publications/84884704043

U2 - 10.1016/j.poly.2013.01.060

DO - 10.1016/j.poly.2013.01.060

M3 - Article

SN - 0277-5387

VL - 64

SP - 30

EP - 37

JO - Polyhedron

JF - Polyhedron

ER -

Copper(II)/di-2-pyridyl ketone chemistry: A triangular cluster displaying antisymmetric exchange versus an 1D coordination polymer

Abstract

Keywords

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