TY - JOUR
T1 - Copper(ii) complexes of two new pyridylAliphatic amine ligands
T2 - Synthetic, structural, EPR, and magnetic studies
AU - Lee, Young Hoon
AU - Kristopo, Hari
AU - Woo, Arim
AU - Won, Mi Seon
AU - Hayami, Shinya
AU - Thúry, Pierre
AU - Jung, Ok Sang
AU - Lee, Hong In
AU - Kim, Bok Jo
AU - Lindoy, Leonard F.
AU - Kim, Yang
PY - 2012
Y1 - 2012
N2 - Two new polyamine ligands, L 1 and L 2, incorporating pyridyl and aliphatic amine donor sites have been prepared and their reaction with copper(ii) yields the mono- and binuclear complexes [Cu(L 1)](ClO 4) 2 (1) and [Cl 2Cu(L 2)CuCl(H 2O)]ClO 4 (2), respectively. The X-ray structure of 1 confirms that the five nitrogen donors of L 1 are bound to the central copper ion to give a distorted square pyramidal coordination sphere. In 2, L 2 acts as a bridging ligand with its N 3-donor coordination domains separated by a m-xylylene spacer group. An unusual feature of this latter complex is that symmetrical L 2 gives rise to non-equivalent coordination behaviour at the individual copper sites; while both sites display five-coordination with distorted square pyramidal arrangements, they differ in having N 3Cl 2- and N 3ClO-donor atom sets, respectively. The electron paramagnetic resonance (EPR) spectra of both complexes are discussed. Variable temperature magnetic susceptibility data confirmed the absence of magnetic interactions in 1 while a weak antiferromagnetic interaction between copper(ii) centres occurs in 2.
AB - Two new polyamine ligands, L 1 and L 2, incorporating pyridyl and aliphatic amine donor sites have been prepared and their reaction with copper(ii) yields the mono- and binuclear complexes [Cu(L 1)](ClO 4) 2 (1) and [Cl 2Cu(L 2)CuCl(H 2O)]ClO 4 (2), respectively. The X-ray structure of 1 confirms that the five nitrogen donors of L 1 are bound to the central copper ion to give a distorted square pyramidal coordination sphere. In 2, L 2 acts as a bridging ligand with its N 3-donor coordination domains separated by a m-xylylene spacer group. An unusual feature of this latter complex is that symmetrical L 2 gives rise to non-equivalent coordination behaviour at the individual copper sites; while both sites display five-coordination with distorted square pyramidal arrangements, they differ in having N 3Cl 2- and N 3ClO-donor atom sets, respectively. The electron paramagnetic resonance (EPR) spectra of both complexes are discussed. Variable temperature magnetic susceptibility data confirmed the absence of magnetic interactions in 1 while a weak antiferromagnetic interaction between copper(ii) centres occurs in 2.
UR - http://www.scopus.com/inward/record.url?scp=84864948612&partnerID=8YFLogxK
U2 - 10.1071/CH12145
DO - 10.1071/CH12145
M3 - Article
AN - SCOPUS:84864948612
SN - 0004-9425
VL - 65
SP - 926
EP - 930
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
IS - 7
ER -