TY - JOUR
T1 - Syntheses, characterization, single crystal X-ray structures and antimicrobial activities of four Cu(II) 3-halobenzoate complexes; Cu(3-chloro/bromobenzoate)2 in the presence of heterocyclic N-donor ligands β/γ-picolines
AU - Sharma, Raj Pal
AU - Kumar, Santosh
AU - Kumar, Jitendra
AU - Venugopalan, Paloth
AU - Gondil, Vijay Singh
AU - Chibber, Sanjay
AU - Aree, Thammarat
N1 - Funding Information:
The authors RPS and SK acknowledge the financial support of UGC , New Delhi (India) as a UGC Emeritus and BSR Meritorious Fellowship respectively. TA is thankful for partial financial support from the Ratchadapisek Sompoch Endowment Fund, Chulalongkorn University (CU-58-021-FW). PV thanks DST PURSE program of PU, Chandigarh. A special thanks to Prof. B. Pal, Thapar University, Patiala for his support in recording Solid State UV–Vis spectra for complexes.
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2016/11/24
Y1 - 2016/11/24
N2 - The reaction of hydrated copper(II) 3-chloro/bromobenzoates with β/γ-picoline in a methanol:water mixture (4:1 v/v) yielded four monomeric complexes, [Cu(3-chlorobenzoate)2(β-picoline)2] (1), [Cu(3-chlorobenzoate)2(γ-picoline)2(H2O)] (2), [Cu(3-bromobenzoate)2(β-picoline)2(H2O)] (3) and [Cu(3-bromobenzoate)2(γ-picoline)2)] (4). The newly synthesized complexes have been characterized by elemental analyses, spectroscopic methods (FT-IR, UV–Vis), TGA and single crystal X-ray structure determination. Crystallographic investigations revealed that all the copper(II) 3-halobenzoates complexes with β-/γ-picoline ligands are monomeric in nature, in contrast to polymeric copper(II) 2-halobenzoate complexes in the presence of similar N-donor ligands. Various non-covalent interactions, like O–H⋯O, C–H⋯O, C–H⋯π and anion ⋯π, have been observed to play a decisive role in the stabilization of the crystal lattices in all the complexes. All the newly synthesized copper(II) complexes show significant antibacterial activity against gram negative and gram positive bacteria.
AB - The reaction of hydrated copper(II) 3-chloro/bromobenzoates with β/γ-picoline in a methanol:water mixture (4:1 v/v) yielded four monomeric complexes, [Cu(3-chlorobenzoate)2(β-picoline)2] (1), [Cu(3-chlorobenzoate)2(γ-picoline)2(H2O)] (2), [Cu(3-bromobenzoate)2(β-picoline)2(H2O)] (3) and [Cu(3-bromobenzoate)2(γ-picoline)2)] (4). The newly synthesized complexes have been characterized by elemental analyses, spectroscopic methods (FT-IR, UV–Vis), TGA and single crystal X-ray structure determination. Crystallographic investigations revealed that all the copper(II) 3-halobenzoates complexes with β-/γ-picoline ligands are monomeric in nature, in contrast to polymeric copper(II) 2-halobenzoate complexes in the presence of similar N-donor ligands. Various non-covalent interactions, like O–H⋯O, C–H⋯O, C–H⋯π and anion ⋯π, have been observed to play a decisive role in the stabilization of the crystal lattices in all the complexes. All the newly synthesized copper(II) complexes show significant antibacterial activity against gram negative and gram positive bacteria.
KW - 3-Chloro/bromobenzoates
KW - Antibacterial
KW - Copper(II) complexes
KW - Spectroscopy
KW - X-ray crystallography
UR - http://www.scopus.com/inward/record.url?scp=84992126355&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2016.09.013
DO - 10.1016/j.poly.2016.09.013
M3 - Article
AN - SCOPUS:84992126355
SN - 0277-5387
VL - 119
SP - 494
EP - 504
JO - Polyhedron
JF - Polyhedron
ER -