TY - JOUR
T1 - 2-Chloro-4-fluorobenzoate vs. 2,4-dichlorobenzoate
T2 - A comparative study of non-covalent interactions in copper(II) 2-chloro-4-fluorobenzoate and copper(II) 2,4-dichlorobenzoate complexes with nitrogen-donor ligands
AU - Sharma, Raj Pal
AU - Saini, Anju
AU - Kumar, Santosh
AU - Venugopalan, Paloth
AU - Yanan, Guo
AU - Yu, Jihong
AU - Ferretti, Valeria
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The coordination behavior of 2-chloro-4-fluorobenzoate and 2,4-dichlorobenzoate ligands towards copper(II) ion were investigated in the presence of different nitrogen ligands. Four new copper(II) complexes, [trans-Cu(2-Cl-4-FC7H3O2)2(β-pic)2] 1, [trans-Cu(en)2(H2O)2](2-Cl-4-FC7H3O2)2, 2, [trans-Cu(2,4-Cl2C7H3O2)2(β-pic)2(H2O)2], 3 and [trans-Cu(en)2(H2O)2](2,4-Cl2C7H3O2)2·2H2O, 4, (where β-pic = β-picoline, en = ethylenediamine) were synthesized by addition of β-picoline/ethylenediamine to the respective hydrated copper(II) arylcarboxylate suspended in methanol-water (4:1) mixture at room temperature. The newly synthesized complexes have been characterized by elemental analyses, TGA, spectroscopic techniques (FT-IR and UV-Vis), conductance, magnetic susceptibility studies. Single-crystal X-ray structure determination of the complexes revealed the presence of neutral structure in complexes 1 and 3 whereas complexes 2 and 4 possess ionic structure consisting of complex cation [trans-Cu(en)2(H2O)2]2+ and two 2-chloro-4-fluorobenzoate/2,4-dichlorobenzoate as counter anions. The crystal lattice in these copper(II) complexes is stabilized by various non-covalent interactions such as N-H...O, O-H...O hydrogen bonds and other weaker interactions including C-H...π, C-H...halogen and halogen...halogen ones. A comparison of non-covalent interactions in four copper(II) complexes is also discussed.
AB - The coordination behavior of 2-chloro-4-fluorobenzoate and 2,4-dichlorobenzoate ligands towards copper(II) ion were investigated in the presence of different nitrogen ligands. Four new copper(II) complexes, [trans-Cu(2-Cl-4-FC7H3O2)2(β-pic)2] 1, [trans-Cu(en)2(H2O)2](2-Cl-4-FC7H3O2)2, 2, [trans-Cu(2,4-Cl2C7H3O2)2(β-pic)2(H2O)2], 3 and [trans-Cu(en)2(H2O)2](2,4-Cl2C7H3O2)2·2H2O, 4, (where β-pic = β-picoline, en = ethylenediamine) were synthesized by addition of β-picoline/ethylenediamine to the respective hydrated copper(II) arylcarboxylate suspended in methanol-water (4:1) mixture at room temperature. The newly synthesized complexes have been characterized by elemental analyses, TGA, spectroscopic techniques (FT-IR and UV-Vis), conductance, magnetic susceptibility studies. Single-crystal X-ray structure determination of the complexes revealed the presence of neutral structure in complexes 1 and 3 whereas complexes 2 and 4 possess ionic structure consisting of complex cation [trans-Cu(en)2(H2O)2]2+ and two 2-chloro-4-fluorobenzoate/2,4-dichlorobenzoate as counter anions. The crystal lattice in these copper(II) complexes is stabilized by various non-covalent interactions such as N-H...O, O-H...O hydrogen bonds and other weaker interactions including C-H...π, C-H...halogen and halogen...halogen ones. A comparison of non-covalent interactions in four copper(II) complexes is also discussed.
KW - Coordination chemistry
KW - Copper(II)
KW - Ethylenediamine
KW - β-Picoline 2-chloro-4-fluorobenzoate
UR - http://www.scopus.com/inward/record.url?scp=84950143550&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2015.11.020
DO - 10.1016/j.ica.2015.11.020
M3 - Article
AN - SCOPUS:84950143550
SN - 0020-1693
VL - 442
SP - 37
EP - 45
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
ER -
