Synthesis, crystal structures and magnetic properties of five new metal(II) compounds constructed with isomers of aminobenzonitrile and dicyanamide ligands

Moumita Biswas; Georgina M. Rosair; Guillaume Pilet; M. Salah El Fallah; Joan Ribas; Samiran Mitra

doi:10.1016/j.poly.2006.08.008

Synthesis, crystal structures and magnetic properties of five new metal(II) compounds constructed with isomers of aminobenzonitrile and dicyanamide ligands

Moumita Biswas
, Georgina M. Rosair
, Guillaume Pilet
, M. Salah El Fallah
, Joan Ribas
, Samiran Mitra

School of Engineering & Physical Sciences

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

11 Citations (Scopus)

Abstract

Five new compounds formulated as [Ni^II(dca)₂(para-ABN)₂(H₂O)₂] (1), [Cu^II(dca)₂(para-ABN)₂(H₂O) ₂] (2), [Cu^II(dca)₂(para-ABN)₂]_n, (3), [Cu^II(dca)₂(ortho-ABN)₂]_n, (4) and [Cd^II(dca)₂(meta-ABN)₂]_n (5), where dca = dicyanamide and ABN = aminobenzonitrile, have been synthesized and characterized by single crystal X-ray diffraction studies and low temperature (300-2 K) magnetic measurements. The structural analyses revealed that 1 and 2 are isomorphous where dca and para-ABN both act as monodentate ligands. 3 consists of infinite double stranded chains of Cu(II) ions connected through the para-ABN bridges whereas 4 and 5 consist of infinite double stranded chains of Cu(II) and Cd(II) respectively, connected through µ_1,5-dca bridges. The compounds extend their geometries to three-dimensional for 1-3 and 5 and two-dimensional for 4 through hydrogen bonding interactions. All the metal ions Ni²⁺, Cu²⁺ and Cd²⁺ are located on inversion centres and have distorted octahedral coordination geometries. The variable temperature magnetic susceptibility measurements show that the global feature of the ?_MT versus T curves for 3 and 4 is characteristic of very weak antiferromagnetic interactions and between 300 and 2 K the best fit parameters were determined as J = -2.35 and -5.1 cm^-1, respectively. © 2006 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	123-132
Number of pages	10
Journal	Polyhedron
Volume	26
Issue number	1
DOIs	https://doi.org/10.1016/j.poly.2006.08.008
Publication status	Published - 2 Jan 2007

Keywords

Bridging ligands (dca, ABN)
First Cu-ABN compounds
Magnetic properties
Metal (nickel, copper, cadmium)
Supramolecular structures

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10.1016/j.poly.2006.08.008

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@article{bb3831977c5a4d82aedff9d49014735e,

title = "Synthesis, crystal structures and magnetic properties of five new metal(II) compounds constructed with isomers of aminobenzonitrile and dicyanamide ligands",

abstract = "Five new compounds formulated as [NiII(dca)2(para-ABN)2(H2O)2] (1), [CuII(dca)2(para-ABN)2(H2O) 2] (2), [CuII(dca)2(para-ABN)2]n, (3), [CuII(dca)2(ortho-ABN)2]n, (4) and [CdII(dca)2(meta-ABN)2]n (5), where dca = dicyanamide and ABN = aminobenzonitrile, have been synthesized and characterized by single crystal X-ray diffraction studies and low temperature (300-2 K) magnetic measurements. The structural analyses revealed that 1 and 2 are isomorphous where dca and para-ABN both act as monodentate ligands. 3 consists of infinite double stranded chains of Cu(II) ions connected through the para-ABN bridges whereas 4 and 5 consist of infinite double stranded chains of Cu(II) and Cd(II) respectively, connected through µ1,5-dca bridges. The compounds extend their geometries to three-dimensional for 1-3 and 5 and two-dimensional for 4 through hydrogen bonding interactions. All the metal ions Ni2+, Cu2+ and Cd2+ are located on inversion centres and have distorted octahedral coordination geometries. The variable temperature magnetic susceptibility measurements show that the global feature of the ?MT versus T curves for 3 and 4 is characteristic of very weak antiferromagnetic interactions and between 300 and 2 K the best fit parameters were determined as J = -2.35 and -5.1 cm-1, respectively. {\textcopyright} 2006 Elsevier Ltd. All rights reserved.",

keywords = "Bridging ligands (dca, ABN), First Cu-ABN compounds, Magnetic properties, Metal (nickel, copper, cadmium), Supramolecular structures",

author = "Moumita Biswas and Rosair, \{Georgina M.\} and Guillaume Pilet and \{El Fallah\}, \{M. Salah\} and Joan Ribas and Samiran Mitra",

year = "2007",

month = jan,

day = "2",

doi = "10.1016/j.poly.2006.08.008",

language = "English",

volume = "26",

pages = "123--132",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd",

number = "1",

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TY - JOUR

T1 - Synthesis, crystal structures and magnetic properties of five new metal(II) compounds constructed with isomers of aminobenzonitrile and dicyanamide ligands

AU - Biswas, Moumita

AU - Rosair, Georgina M.

AU - Pilet, Guillaume

AU - El Fallah, M. Salah

AU - Ribas, Joan

AU - Mitra, Samiran

PY - 2007/1/2

Y1 - 2007/1/2

N2 - Five new compounds formulated as [NiII(dca)2(para-ABN)2(H2O)2] (1), [CuII(dca)2(para-ABN)2(H2O) 2] (2), [CuII(dca)2(para-ABN)2]n, (3), [CuII(dca)2(ortho-ABN)2]n, (4) and [CdII(dca)2(meta-ABN)2]n (5), where dca = dicyanamide and ABN = aminobenzonitrile, have been synthesized and characterized by single crystal X-ray diffraction studies and low temperature (300-2 K) magnetic measurements. The structural analyses revealed that 1 and 2 are isomorphous where dca and para-ABN both act as monodentate ligands. 3 consists of infinite double stranded chains of Cu(II) ions connected through the para-ABN bridges whereas 4 and 5 consist of infinite double stranded chains of Cu(II) and Cd(II) respectively, connected through µ1,5-dca bridges. The compounds extend their geometries to three-dimensional for 1-3 and 5 and two-dimensional for 4 through hydrogen bonding interactions. All the metal ions Ni2+, Cu2+ and Cd2+ are located on inversion centres and have distorted octahedral coordination geometries. The variable temperature magnetic susceptibility measurements show that the global feature of the ?MT versus T curves for 3 and 4 is characteristic of very weak antiferromagnetic interactions and between 300 and 2 K the best fit parameters were determined as J = -2.35 and -5.1 cm-1, respectively. © 2006 Elsevier Ltd. All rights reserved.

AB - Five new compounds formulated as [NiII(dca)2(para-ABN)2(H2O)2] (1), [CuII(dca)2(para-ABN)2(H2O) 2] (2), [CuII(dca)2(para-ABN)2]n, (3), [CuII(dca)2(ortho-ABN)2]n, (4) and [CdII(dca)2(meta-ABN)2]n (5), where dca = dicyanamide and ABN = aminobenzonitrile, have been synthesized and characterized by single crystal X-ray diffraction studies and low temperature (300-2 K) magnetic measurements. The structural analyses revealed that 1 and 2 are isomorphous where dca and para-ABN both act as monodentate ligands. 3 consists of infinite double stranded chains of Cu(II) ions connected through the para-ABN bridges whereas 4 and 5 consist of infinite double stranded chains of Cu(II) and Cd(II) respectively, connected through µ1,5-dca bridges. The compounds extend their geometries to three-dimensional for 1-3 and 5 and two-dimensional for 4 through hydrogen bonding interactions. All the metal ions Ni2+, Cu2+ and Cd2+ are located on inversion centres and have distorted octahedral coordination geometries. The variable temperature magnetic susceptibility measurements show that the global feature of the ?MT versus T curves for 3 and 4 is characteristic of very weak antiferromagnetic interactions and between 300 and 2 K the best fit parameters were determined as J = -2.35 and -5.1 cm-1, respectively. © 2006 Elsevier Ltd. All rights reserved.

KW - Bridging ligands (dca, ABN)

KW - First Cu-ABN compounds

KW - Magnetic properties

KW - Metal (nickel, copper, cadmium)

KW - Supramolecular structures

U2 - 10.1016/j.poly.2006.08.008

DO - 10.1016/j.poly.2006.08.008

M3 - Article

SN - 0277-5387

VL - 26

SP - 123

EP - 132

JO - Polyhedron

JF - Polyhedron

IS - 1

ER -

Synthesis, crystal structures and magnetic properties of five new metal(II) compounds constructed with isomers of aminobenzonitrile and dicyanamide ligands

Abstract

Keywords

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