Ultrasonic synthesis of Oct. trans-Br2Cu(N ∩ N)2 Jahn-Teller distortion complex: XRD-properties, solvatochromism, thermal, kinetic and DNA-binding evaluations

A new square pyramidal copper(II) complex [Cu(C10H24N4)Br]Br: Crystal structure, thermal analysis, Hirschfeld surfaces, electrical and semiconducting properties

“…The Br1 occupies the apical pyramidal position at 2.6028 (6) Å and a deviation of Cu(II) from the basal plane of 0.396 Å. This axial elongation is due to Jahn-Teller effect characteristic of Cu(II) complexes [53,54]. The Cu-N bond lengths are relatively insensitive to ring strain and/or alkyl substitution on the aliphatic linear tetradentate amines.…”

Copper (II) halide complexes with NNO tridentate ligand as chromotropic probes; synthesis, structural characterization and spectroscopic properties

“…The Cu-Cl(1) and Cu-Cl(2) bond lengths in 1 are 2.4901(4) and 2.2794(4) Å, respectively, whereas the corresponding Cu-Br bond lengths in 2 are 2.7251(3) and 2.3947(3) Å. The Cu-N bond lengths are in the range of 1.9995(14) to 2.0389 (14) Å and are comparable to literature values [ 18 , 25 , 26 ]. In the crystal lattice of compound 1 , hydrogen bonding occurs between the hydroxyl group of the ligand and the equatorial chloride ion of a neighboring molecule (O(1)H(1A) •••Cl(2) = 3.1517(13) Å), by which a dimeric entity forms that is further linked to neighboring ones through hydrogen bonding between the secondary amine hydrogen and apical chloride ions (N(2)H(2A) •••Cl(1) = 3.2430(15) Å).…”

“…The presence of labile metal-ligand bonds in the coordination sphere is a feasible approach to increase the sensitivity of the complexes to environmental changes [13] . Earlier studies show that the structure and spectroscopic properties of copper complexes containing chloride and/or bromide ions change upon heating or increasing the polarity in the solution [14] . Therefore, copper halide complexes with the proper combination of chelating ligands are expected to exhibit thermo and solvatochromic behavior [ 15 , 16 ].…”

Synthesis and amide imidic prototropic tautomerization in thiophene-2-carbohydrazide: XRD, DFT/HSA-computation, DNA-docking, TG and isoconversional kineticsviaFWO and KAS models

“…Moreover, the signicant variation in E a values indicated a complex kinetics stimulated decomposition process, the non-linear relationship between E a and a provided collected via both models indicated that the ligand is prospective to be decomposed via more than one steps reaction (n > 1) and not through one broad step as thermal analysis reected. [37][38][39] Therefore, Avrami kinetic equation 39 was applied at xed suitable temperature 160 C and in a ¼ 0.1-0.9 range to support the complexity (multi-step) of thiophene-2-carbohydrazide thermal degradation reaction as in eqn (11).…”