Cyano-bridged pentanuclear and honeycomblike M IIICu II (M = Fe, Cr) bimetallic assemblies: Structural variations modulated by side groups of macrocyclic ligands and magnetic properties

Jeong Hak Lim, Jung Hee Yoon, Sang Yup Choi, Dae Won Ryu, Eui Kwan Koh, Chang Seop Hong

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Three two-dimensional (2D) layered M(III)-Cu(II) (M = Fe, Cr) bimetallic complexes and a discrete cluster were prepared using [M(CN) 6] 3- and respective Cu macrocycles with methyl (1, 3) or ethyl (2, 4) side groups. The crystal structures can be described as aesthetic honeycomb-like M 2Cu 3 neutral sheets (1, 3, 4) and a pentanuclear Fe 2Cu 3 entity (2) with an isolated Cu(L2) 2+ moiety. The steric hindrance induced by the pendant groups renders the internal parameters of the Cu-N ax (where the "ax" subscript denotes axial) length and Cu-N ax-C ax angle to become elongated and acute. The magnetic data disclose that ferromagnetic couplings are transmitted between M(III) and Cu(II) ions through the CN links. For 4, particularly, there is a magnetically defined chain (J c) composed of dimers (J d) and trimers (J t), based on the structural considerations. The intramolecular magnetic coupling constants are J d = 3.73 cm -1 and J t = 4.08 cm -1, while the J c value corresponds to 0.17 cm -1. From a magnetostructural point of view, it is reasoned that the Cu-N ax bond length is probably a determining factor of the strength of magnetic couplings in 4.

Original languageEnglish
Pages (from-to)1749-1757
Number of pages9
JournalInorganic Chemistry
Volume50
Issue number5
DOIs
Publication statusPublished - 2011 Mar 7

Fingerprint

Magnetic couplings
Esthetics
assemblies
Magnetic properties
Ions
magnetic properties
Ligands
ligands
Bond length
Dimers
neutral sheets
Crystal structure
trimers
dimers
crystal structure
ions

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Cyano-bridged pentanuclear and honeycomblike M IIICu II (M = Fe, Cr) bimetallic assemblies : Structural variations modulated by side groups of macrocyclic ligands and magnetic properties. / Lim, Jeong Hak; Yoon, Jung Hee; Choi, Sang Yup; Ryu, Dae Won; Koh, Eui Kwan; Hong, Chang Seop.

In: Inorganic Chemistry, Vol. 50, No. 5, 07.03.2011, p. 1749-1757.

Research output: Contribution to journalArticle

@article{5263b633528148108af495b56561cd10,
title = "Cyano-bridged pentanuclear and honeycomblike M IIICu II (M = Fe, Cr) bimetallic assemblies: Structural variations modulated by side groups of macrocyclic ligands and magnetic properties",
abstract = "Three two-dimensional (2D) layered M(III)-Cu(II) (M = Fe, Cr) bimetallic complexes and a discrete cluster were prepared using [M(CN) 6] 3- and respective Cu macrocycles with methyl (1, 3) or ethyl (2, 4) side groups. The crystal structures can be described as aesthetic honeycomb-like M 2Cu 3 neutral sheets (1, 3, 4) and a pentanuclear Fe 2Cu 3 entity (2) with an isolated Cu(L2) 2+ moiety. The steric hindrance induced by the pendant groups renders the internal parameters of the Cu-N ax (where the {"}ax{"} subscript denotes axial) length and Cu-N ax-C ax angle to become elongated and acute. The magnetic data disclose that ferromagnetic couplings are transmitted between M(III) and Cu(II) ions through the CN links. For 4, particularly, there is a magnetically defined chain (J c) composed of dimers (J d) and trimers (J t), based on the structural considerations. The intramolecular magnetic coupling constants are J d = 3.73 cm -1 and J t = 4.08 cm -1, while the J c value corresponds to 0.17 cm -1. From a magnetostructural point of view, it is reasoned that the Cu-N ax bond length is probably a determining factor of the strength of magnetic couplings in 4.",
author = "Lim, {Jeong Hak} and Yoon, {Jung Hee} and Choi, {Sang Yup} and Ryu, {Dae Won} and Koh, {Eui Kwan} and Hong, {Chang Seop}",
year = "2011",
month = "3",
day = "7",
doi = "10.1021/ic102179n",
language = "English",
volume = "50",
pages = "1749--1757",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Cyano-bridged pentanuclear and honeycomblike M IIICu II (M = Fe, Cr) bimetallic assemblies

T2 - Structural variations modulated by side groups of macrocyclic ligands and magnetic properties

AU - Lim, Jeong Hak

AU - Yoon, Jung Hee

AU - Choi, Sang Yup

AU - Ryu, Dae Won

AU - Koh, Eui Kwan

AU - Hong, Chang Seop

PY - 2011/3/7

Y1 - 2011/3/7

N2 - Three two-dimensional (2D) layered M(III)-Cu(II) (M = Fe, Cr) bimetallic complexes and a discrete cluster were prepared using [M(CN) 6] 3- and respective Cu macrocycles with methyl (1, 3) or ethyl (2, 4) side groups. The crystal structures can be described as aesthetic honeycomb-like M 2Cu 3 neutral sheets (1, 3, 4) and a pentanuclear Fe 2Cu 3 entity (2) with an isolated Cu(L2) 2+ moiety. The steric hindrance induced by the pendant groups renders the internal parameters of the Cu-N ax (where the "ax" subscript denotes axial) length and Cu-N ax-C ax angle to become elongated and acute. The magnetic data disclose that ferromagnetic couplings are transmitted between M(III) and Cu(II) ions through the CN links. For 4, particularly, there is a magnetically defined chain (J c) composed of dimers (J d) and trimers (J t), based on the structural considerations. The intramolecular magnetic coupling constants are J d = 3.73 cm -1 and J t = 4.08 cm -1, while the J c value corresponds to 0.17 cm -1. From a magnetostructural point of view, it is reasoned that the Cu-N ax bond length is probably a determining factor of the strength of magnetic couplings in 4.

AB - Three two-dimensional (2D) layered M(III)-Cu(II) (M = Fe, Cr) bimetallic complexes and a discrete cluster were prepared using [M(CN) 6] 3- and respective Cu macrocycles with methyl (1, 3) or ethyl (2, 4) side groups. The crystal structures can be described as aesthetic honeycomb-like M 2Cu 3 neutral sheets (1, 3, 4) and a pentanuclear Fe 2Cu 3 entity (2) with an isolated Cu(L2) 2+ moiety. The steric hindrance induced by the pendant groups renders the internal parameters of the Cu-N ax (where the "ax" subscript denotes axial) length and Cu-N ax-C ax angle to become elongated and acute. The magnetic data disclose that ferromagnetic couplings are transmitted between M(III) and Cu(II) ions through the CN links. For 4, particularly, there is a magnetically defined chain (J c) composed of dimers (J d) and trimers (J t), based on the structural considerations. The intramolecular magnetic coupling constants are J d = 3.73 cm -1 and J t = 4.08 cm -1, while the J c value corresponds to 0.17 cm -1. From a magnetostructural point of view, it is reasoned that the Cu-N ax bond length is probably a determining factor of the strength of magnetic couplings in 4.

UR - http://www.scopus.com/inward/record.url?scp=79952268447&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952268447&partnerID=8YFLogxK

U2 - 10.1021/ic102179n

DO - 10.1021/ic102179n

M3 - Article

C2 - 21192714

AN - SCOPUS:79952268447

VL - 50

SP - 1749

EP - 1757

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 5

ER -