Open AccessSyntheses, Structures, Magnetic Properties and Antibacterial Activities of Two Copper(II) Azido Complexes with Varied Nuclearities Containing Symmetrical 1,3-Diammine as Chelator
Author(s) -
Habibar Chowdhury,
Chandan Adhikary
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23007
Subject(s) - chemistry , azide , crystallography , copper , denticity , crystal structure , chromophore , square pyramidal molecular geometry , intermolecular force , chelation , hydrogen bond , octahedron , octahedral molecular geometry , stereochemistry , magnetic susceptibility , molecule , inorganic chemistry , photochemistry , organic chemistry
Two copper(II) azido complexes of the types mononuclear [Cu(TMEDA)2(N3)2] (1) and dinuclear[Cu(TMEDA)(μ1,1-N3)(N3)]2 (2) [TMEDA = trimethylenediamine; N3– = azide ion] have beensynthesized and characterized. X-ray structural analysis revealed that each copper(II) center in complex1 adopts a distorted octahedron geometry with a CuN6 chromophore ligated through four N atoms oftwo different symmetrical TMEDA ligands as bidentate chelator and two N atoms of two terminalazides. In complex 2, each copper(II) center adopts a distorted square pyramidal geometry with aCuN5 chromophore ligated through two N atoms of TMEDA as bidentate chelator and two N atoms oftwo different azides as μ1,1-N3 bridging mode and one N atom of terminal azide ion. The two coppercenters are connected through double μ1,1-N3 bridges affording a dinuclear structure with Cu···Cuseparation 3.327(2) Å. In crystalline state, mononuclear units in complex 1 are associated throughintermolecular N-H···N and C-H···N hydrogen bonds to form a 2D sheet structure viewed alongcrystallographic b-axis, whereas dinuclear entities in complex 2 are propagated through intermolecularN-H···N and C-H···N hydrogen bonds to form a 3D network structure viewed along crystallographica-axis. The Variable-temperature magnetic susceptibility measurement evidenced a dominantantiferromagnetic interaction between the metal centers through μ1,1-azide bridges in complex 2 with J =− 0.40 cm-1. The antibacterial activities of the complexes have also been studied.