TY - JOUR
T1 - Versatile binding properties of di-pyridyl ligands with Cu(II) complexes
T2 - The syntheses, structural characterization and thermal analysis of six new species
AU - Massoud, Salah S.
AU - Druel, Elodie
AU - Dufort, Marisa
AU - Lalancette, Roger
AU - Kitchen, Jarrett
AU - Grebowicz, Janusz
AU - Vicente, Ramon
AU - Mukhopadhyay, Uday
AU - Bernal, Ivan
AU - Mautner, Franz A.
N1 - Funding Information: This research was financially supported by the University of Louisiana at Lafayette, and SSM thanks Dean B. Clark (UL-Lafayette). The Robert A. Welch Foundation supported this investigation through grant E-592 to IB . The authors acknowledge support by NSF-CRIF grant no. 0443538 for part of the X-ray diffractometer.
PY - 2009/11/16
Y1 - 2009/11/16
N2 - A novel series of 4,4′-bipyridine- and 1,2-bis(4-pyridyl)ethane-Cu(II) complexes were synthesized using a variety of amine ligands (DPA = di(2-pyridylmethyl)amine, Medpt = 3,3′-diamino-N-methyldipropylamine, Hbpca = bis(2-pyridylcarbonyl)amine, TPA = tris(2-pyridylmethyl)amine) and cyclen = 1,4,7,10-tetraazacyclododecane). Different complexes were obtained including mononuclear [Cu(cyclen)(4,4′-bipy)](ClO4)2 (1), dinuclear {[Cu(μ2-bpca)(4,4′-bipy)(H2O)]ClO4}2 (2), [Cu2(DPA)2(μ2-4,4′-bipy)(ClO4)4)]·H2O (3), [Cu2(cyclen)2(μ2-bpe)](ClO4)4 (4) and [Cu2(TPA)2(μ2-bpe)](ClO4)4 (5) and the 1-D polymer, {[Cu(Medpt)(μ2-4,4′-bipy)](ClO4)2}n (6). In the 1-6 samples, cooling up to 100 K produces only the expected, minor, changes in cell constants given no space group changes. Therefore, data for the 100 K structures are reported only. Single-crystal X-ray crystallography reveals the monodentate coordination of the 4,4′-bipy in 1 and 2, and the bridged nature of the di-pyridyl ligands in the dinuclear complexes 2-5 and in the polymeric complex 6. In this series, structures 3-6 consist of the 4,4′-bipy or bpe bridging the two Cu(II) centers, the coordination by the tri- or the tetra-N donors of the amine, and the ClO4- groups as counter ions in 4-6 complexes. In the complexes 3-6, the Cu···Cu distances across the bridged di-pyridyl ligands were found to be greater than 11 Å. The magnetic properties of complex 3 reveal no evidence for magnetic coupling between the two Cu(II) centers (J = -0.58 cm-1).
AB - A novel series of 4,4′-bipyridine- and 1,2-bis(4-pyridyl)ethane-Cu(II) complexes were synthesized using a variety of amine ligands (DPA = di(2-pyridylmethyl)amine, Medpt = 3,3′-diamino-N-methyldipropylamine, Hbpca = bis(2-pyridylcarbonyl)amine, TPA = tris(2-pyridylmethyl)amine) and cyclen = 1,4,7,10-tetraazacyclododecane). Different complexes were obtained including mononuclear [Cu(cyclen)(4,4′-bipy)](ClO4)2 (1), dinuclear {[Cu(μ2-bpca)(4,4′-bipy)(H2O)]ClO4}2 (2), [Cu2(DPA)2(μ2-4,4′-bipy)(ClO4)4)]·H2O (3), [Cu2(cyclen)2(μ2-bpe)](ClO4)4 (4) and [Cu2(TPA)2(μ2-bpe)](ClO4)4 (5) and the 1-D polymer, {[Cu(Medpt)(μ2-4,4′-bipy)](ClO4)2}n (6). In the 1-6 samples, cooling up to 100 K produces only the expected, minor, changes in cell constants given no space group changes. Therefore, data for the 100 K structures are reported only. Single-crystal X-ray crystallography reveals the monodentate coordination of the 4,4′-bipy in 1 and 2, and the bridged nature of the di-pyridyl ligands in the dinuclear complexes 2-5 and in the polymeric complex 6. In this series, structures 3-6 consist of the 4,4′-bipy or bpe bridging the two Cu(II) centers, the coordination by the tri- or the tetra-N donors of the amine, and the ClO4- groups as counter ions in 4-6 complexes. In the complexes 3-6, the Cu···Cu distances across the bridged di-pyridyl ligands were found to be greater than 11 Å. The magnetic properties of complex 3 reveal no evidence for magnetic coupling between the two Cu(II) centers (J = -0.58 cm-1).
KW - Coordination polymer
KW - Copper
KW - Crystal structure
KW - Di-pyridyl bridged
KW - Magnetic behavior
KW - Thermal analysis
UR - https://www.scopus.com/pages/publications/70350511877
UR - https://www.scopus.com/pages/publications/70350511877#tab=citedBy
U2 - 10.1016/j.poly.2009.08.019
DO - 10.1016/j.poly.2009.08.019
M3 - Article
SN - 0277-5387
VL - 28
SP - 3849
EP - 3857
JO - Polyhedron
JF - Polyhedron
IS - 17
ER -