ChemInform Abstract: Synthesis of New Tetraaza Macrocyclic Ligands with Cyclohexane Rings and Their Ni(II) and Cu(II) Complexes.

Kang, Shin‐Geol; Kweon, Jae Keun; Jung, Soo-Kyung

doi:10.1002/chin.199218225

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 3, the solid state electronic spectrum of 1 in the visible region shows three absorption bands at 340, 530, and 694 nm assignable to the 3 B 1g → 3 E g c , 3 B 1g → 3 E g b , 3 B 1g → 3 B 2g + 3 B 1g → 3 A 2g a transitions, which is the characteristic spectrum expected for a high-spin d 8 nickel(II) ion in a distorted octahedral environment [26,27]. However, the complex 1 dissolves in water and decomposes into the original compound [Ni(L)](ClO 4 ) 2 (459 nm) [28], which has a low-spin d 8 nickel(II) ion in a square-planar environment. This fact can be understood in terms of the decomposition of the building block in water solution.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

One-Dimensional Hydrogen-Bonded Infinite Chain from Nickel(II) Tetraaza Macrocyclic Complex and 1,2-Cyclopentanedicarboxylate Ligand

Lim

Choi

2011

IJMS

View full text Add to dashboard Cite

The reaction of [Ni(L)]Cl2·2H2O (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo [14,4,01.18,07.12]docosane) with trans-1,2-cyclopentanedicarboxylic acid (H2-cpdc) yields a 1D hydrogen-bonded infinite chain with formula [Ni(L)(H-cpdc−)2] (1). This complex has been characterized by X-ray crystallography, spectroscopy and cyclic voltammetry. The crystal structure of 1 exhibits a distorted octahedral geometry about Ni atom with four nitrogen atoms of the macrocycle and two oxygen atoms of the H-cpdc− ligand at the axial position. Compound 1 crystallizes in the monoclinic system P21/c with a = 8.7429(17), b = 10.488(2), c = 18.929(4) Å, β = 91.82(2), V = 1734.8(6) Å3, Z = 2. Electronic spectrum of 1 reveals a high-spin octahedral environment. Cyclic voltammetry of 1 undergoes two waves of a one-electron transfer corresponding to NiII/NiIII and NiII/NiI processes.

show abstract

Section: Resultsmentioning

confidence: 99%

“… a Measured in 0.10 M TEAP-DMSO solution at 20.0 ± 0.1 °C; b Reference [ 28 ]. These values are reduced from those of Ag/AgCl reference electrodes; c i = irreversible.…”

Section: Figurementioning

confidence: 99%

One-Dimensional Hydrogen-Bonded Infinite Chain from Nickel(II) Tetraaza Macrocyclic Complex and 1,2-Cyclopentanedicarboxylate Ligand

Lim

Choi

2011

IJMS

View full text Add to dashboard Cite

show abstract

“…The macrocycle L 1 was synthesized according to a previously published procedure [25]. The synthetic process of ligand L 1 is summarized in Scheme 3.…”

Section: Synthesis Of Lmentioning

confidence: 99%

Synthesis, Crystal Structure, Spectroscopic Properties, and Hirshfeld Surface Analysis of Diaqua [3,14-dimethyl-2,6,13,17 tetraazatricyclo(16.4.0.07,12)docosane]copper(II) Dibromide

et al. 2019

View full text Add to dashboard Cite

A newly prepared Cu(II) complex salt, Cu(L1)(H2O)2Br2, where L1 is 3,14-dimethyl-2,6,13,17-tetraazatricyclo(16.4.0.07,12) docosane, is characterized by elemental and crystallographic analyses. The Cu(II) center is coordinated by four nitrogen atoms of macrocyclic ligand and the axial position by two water molecules. The macrocyclic ligand adopts an optimally stable trans-III conformation with normal Cu–N bond lengths of 2.018 (3) and 2.049 (3) Å and long axial Cu1–O1W length of 2.632 (3) Å due to the Jahn–Teller effect. The complex is stabilized by hydrogen bonds formed between the O atoms of water molecules and bromide anions. The bromide anion is connected to the neighboring complex cations and water molecules through N–H···Br and O–H···Br hydrogen bonds, respectively. The g-factors obtained from the electron spin resonance spectrum show the typical trend of g∥ > g⊥ > 2.0023, which is in a good accordance to the dx2-y2 ground state. It reveals a coordination sphere of tetragonal symmetry for the Cu(II) ion. The infrared and electronic absorption spectral properties of the complex are also discussed. Hirshfeld surface analysis represents that the H···H, H···Br/Br···H and H···O/O···H contacts are the major molecular interactions in the prepared complex.

show abstract

“…The macrocycle 3, 14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,0 1.18 ,0 7.12 ]docosane (L) was prepared according to the literature method (Kang et al, 1991). IR spectra were recorded with a Perkin-Elmer Paragon 1000 FT-IR spectrophotometer (Perkin Elmer, Waltham, MA, USA) using KBr pellets.…”

Section: Materials and Physical Measurementsmentioning

confidence: 99%

2D Hydrogen-bonded polymer assembled by zinc(II) tetraaza macrocyclic complex and 1,2-cyclopentanedicarboxylic acid

Choi

2014

Main Group Metal Chemistry

View full text Add to dashboard Cite

The self-assembly of [Zn(L)(H 2 O) 2 ]·Cl 2 and 1,2-cyclopentanedicarboxylic acid generates a 2D hydrogen-bonded polymer [Zn(L)(Hcpdc)] (L = 3,14-dimethyl -2,6,13,17-tetraazatricyclo[14,4,0 1.18 0 7.12 ]docosane, H 2 cpdc= 1,2-cyclopentanedicarboxylic acid) (1). Complex 1 is characterized by X-ray crystallography, spectroscopy, and thermogravimetric analyzer. The crystal structure of 1 shows a distorted octahedral coordination geometry around the zinc (II) ion, with the four secondary amines of the macrocycle and two carboxylate oxygen atoms of the Hcpdc -ligand in the trans position. The compound crystallizes in the monoclinic system P2 1 /c with a = 8.6002(10), b = 10.4906(11), c = 19.008(2) Å, β (°) = 92.949(7)°, V = 1712.6(3) Å 3 , Z = 2. The IR spectrum and TGA behavior of the compound are significantly affected by the Hcpdc -ligand.

show abstract

ChemInform Abstract: Synthesis of New Tetraaza Macrocyclic Ligands with Cyclohexane Rings and Their Ni(II) and Cu(II) Complexes.

Cited by 4 publications

References 0 publications

One-Dimensional Hydrogen-Bonded Infinite Chain from Nickel(II) Tetraaza Macrocyclic Complex and 1,2-Cyclopentanedicarboxylate Ligand

One-Dimensional Hydrogen-Bonded Infinite Chain from Nickel(II) Tetraaza Macrocyclic Complex and 1,2-Cyclopentanedicarboxylate Ligand

Synthesis, Crystal Structure, Spectroscopic Properties, and Hirshfeld Surface Analysis of Diaqua [3,14-dimethyl-2,6,13,17 tetraazatricyclo(16.4.0.07,12)docosane]copper(II) Dibromide

2D Hydrogen-bonded polymer assembled by zinc(II) tetraaza macrocyclic complex and 1,2-cyclopentanedicarboxylic acid

Contact Info

Product

Resources

About