Syntheses, crystal structures and magnetic properties of two dicopper(II) complexes and a zigzag 1-D Cu(II) complex of a bidentate pyridyl-pyrazole ligand

Kinsuk Das; Tarak Nath Mandal; Somnath Roy; Atanu Jana; Saugata Konar; Cai Ming Liu; Anil Kumar Barik; Susanta Kumar Kar

doi:10.1016/j.poly.2010.12.010

Syntheses, crystal structures and magnetic properties of two dicopper(II) complexes and a zigzag 1-D Cu(II) complex of a bidentate pyridyl-pyrazole ligand

Kinsuk Das
, Tarak Nath Mandal
, Somnath Roy
, Atanu Jana
, Saugata Konar
, Cai Ming Liu
, Anil Kumar Barik
, Susanta Kumar Kar

Division of System Semiconductor

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

25 Scopus citations

Abstract

Two new dinuclear copper compounds, [Cu₂(pypz) ₂(N₃)₂(NO₃)₂] (1) and [Cu₂(pypz)₂(OH)₂(NO₃)₂] (2), and one 1-D polymeric Cu(II) complex, [Cu(pypz)(dca)₃] _n (3) ['pypz' = (3,5dimethyl-1-(2′-pyridyl)pyrazole) and dca = (dicyanamide)], have been synthesized and characterized crystallographically and spectroscopically. Complex 1 is pseudo-octahedral, adjacent Cu atoms are connected by a pair of μ(1,1) azido groups and the structure is stabilized by π-π interactions between two pyridyl moieties from two different neighboring complex molecules. Complexes 2 and 3 are square pyramidal. The hydroxo bridged complex 2 is further stabilized through H-bonding. The 1-D polymeric chain of 3 is bridged by an end-to-end dicyanamide bridge and it propagates along the crystallographic b axis, whilst the polymer chains are stacked one upon another along the crystallographic c axis. Low temperature magnetic measurement shows that complexes 1 and 2 are ferromagnetic (J values are 30.81 and 14.79 cm^-1, respectively), whereas due to larger Cu-Cu distances, complex 3 shows weak ferromagnetism.

Original language	English
Pages (from-to)	715-724
Number of pages	10
Journal	Polyhedron
Volume	30
Issue number	5
DOIs	https://doi.org/10.1016/j.poly.2010.12.010
State	Published - 24 Mar 2011

Keywords

1-D coordination polymer
Binuclear Cu(II) complex
Crystal structures
Magnetic properties
Syntheses

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10.1016/j.poly.2010.12.010

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@article{65696925d0d34d648088450cd3313057,

title = "Syntheses, crystal structures and magnetic properties of two dicopper(II) complexes and a zigzag 1-D Cu(II) complex of a bidentate pyridyl-pyrazole ligand",

abstract = "Two new dinuclear copper compounds, [Cu2(pypz) 2(N3)2(NO3)2] (1) and [Cu2(pypz)2(OH)2(NO3)2] (2), and one 1-D polymeric Cu(II) complex, [Cu(pypz)(dca)3] n (3) ['pypz' = (3,5dimethyl-1-(2′-pyridyl)pyrazole) and dca = (dicyanamide)], have been synthesized and characterized crystallographically and spectroscopically. Complex 1 is pseudo-octahedral, adjacent Cu atoms are connected by a pair of μ(1,1) azido groups and the structure is stabilized by π-π interactions between two pyridyl moieties from two different neighboring complex molecules. Complexes 2 and 3 are square pyramidal. The hydroxo bridged complex 2 is further stabilized through H-bonding. The 1-D polymeric chain of 3 is bridged by an end-to-end dicyanamide bridge and it propagates along the crystallographic b axis, whilst the polymer chains are stacked one upon another along the crystallographic c axis. Low temperature magnetic measurement shows that complexes 1 and 2 are ferromagnetic (J values are 30.81 and 14.79 cm-1, respectively), whereas due to larger Cu-Cu distances, complex 3 shows weak ferromagnetism.",

keywords = "1-D coordination polymer, Binuclear Cu(II) complex, Crystal structures, Magnetic properties, Syntheses",

author = "Kinsuk Das and Mandal, \{Tarak Nath\} and Somnath Roy and Atanu Jana and Saugata Konar and Liu, \{Cai Ming\} and Barik, \{Anil Kumar\} and Kar, \{Susanta Kumar\}",

year = "2011",

month = mar,

day = "24",

doi = "10.1016/j.poly.2010.12.010",

language = "English",

volume = "30",

pages = "715--724",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd",

number = "5",

}

TY - JOUR

T1 - Syntheses, crystal structures and magnetic properties of two dicopper(II) complexes and a zigzag 1-D Cu(II) complex of a bidentate pyridyl-pyrazole ligand

AU - Das, Kinsuk

AU - Mandal, Tarak Nath

AU - Roy, Somnath

AU - Jana, Atanu

AU - Konar, Saugata

AU - Liu, Cai Ming

AU - Barik, Anil Kumar

AU - Kar, Susanta Kumar

PY - 2011/3/24

Y1 - 2011/3/24

N2 - Two new dinuclear copper compounds, [Cu2(pypz) 2(N3)2(NO3)2] (1) and [Cu2(pypz)2(OH)2(NO3)2] (2), and one 1-D polymeric Cu(II) complex, [Cu(pypz)(dca)3] n (3) ['pypz' = (3,5dimethyl-1-(2′-pyridyl)pyrazole) and dca = (dicyanamide)], have been synthesized and characterized crystallographically and spectroscopically. Complex 1 is pseudo-octahedral, adjacent Cu atoms are connected by a pair of μ(1,1) azido groups and the structure is stabilized by π-π interactions between two pyridyl moieties from two different neighboring complex molecules. Complexes 2 and 3 are square pyramidal. The hydroxo bridged complex 2 is further stabilized through H-bonding. The 1-D polymeric chain of 3 is bridged by an end-to-end dicyanamide bridge and it propagates along the crystallographic b axis, whilst the polymer chains are stacked one upon another along the crystallographic c axis. Low temperature magnetic measurement shows that complexes 1 and 2 are ferromagnetic (J values are 30.81 and 14.79 cm-1, respectively), whereas due to larger Cu-Cu distances, complex 3 shows weak ferromagnetism.

AB - Two new dinuclear copper compounds, [Cu2(pypz) 2(N3)2(NO3)2] (1) and [Cu2(pypz)2(OH)2(NO3)2] (2), and one 1-D polymeric Cu(II) complex, [Cu(pypz)(dca)3] n (3) ['pypz' = (3,5dimethyl-1-(2′-pyridyl)pyrazole) and dca = (dicyanamide)], have been synthesized and characterized crystallographically and spectroscopically. Complex 1 is pseudo-octahedral, adjacent Cu atoms are connected by a pair of μ(1,1) azido groups and the structure is stabilized by π-π interactions between two pyridyl moieties from two different neighboring complex molecules. Complexes 2 and 3 are square pyramidal. The hydroxo bridged complex 2 is further stabilized through H-bonding. The 1-D polymeric chain of 3 is bridged by an end-to-end dicyanamide bridge and it propagates along the crystallographic b axis, whilst the polymer chains are stacked one upon another along the crystallographic c axis. Low temperature magnetic measurement shows that complexes 1 and 2 are ferromagnetic (J values are 30.81 and 14.79 cm-1, respectively), whereas due to larger Cu-Cu distances, complex 3 shows weak ferromagnetism.

KW - 1-D coordination polymer

KW - Binuclear Cu(II) complex

KW - Crystal structures

KW - Magnetic properties

KW - Syntheses

UR - https://www.scopus.com/pages/publications/79952006592

U2 - 10.1016/j.poly.2010.12.010

DO - 10.1016/j.poly.2010.12.010

M3 - Article

AN - SCOPUS:79952006592

SN - 0277-5387

VL - 30

SP - 715

EP - 724

JO - Polyhedron

JF - Polyhedron

IS - 5

ER -

Syntheses, crystal structures and magnetic properties of two dicopper(II) complexes and a zigzag 1-D Cu(II) complex of a bidentate pyridyl-pyrazole ligand

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