Template-directed synthesis of macrocyclic copper(II) complexes of diazacyclam, 1,3,6,10,12,15-hexaazatricyclo[13.3.1.1<sup>6,10</sup>]eicosane

et al. 2013

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The reaction between 2-(piperazin-1-yl)ethanol and cyclohexene oxide under microwave irradiation gave 2-(4-(2-hydroxyethyl)(1) was prepared from the reaction of cadmium iodide with L and identified by elemental analysis, FT-IR and Raman spectroscopy, and single-crystal X-ray diffraction. In the crystal structure of 1, there is a [Cd 2 I 6 ] 2− dianion with distorted tetrahedral geometry for each cadmium atom. The piperazine and cyclohexane rings in 1 have a chair conformation. In the crystal there are several intermolecular hydrogen bonds including N-H···O, O-H···O, O-H···I, C-H···O, and C-H···I interactions.

Section: Resultsmentioning

confidence: 82%

A Spectral and Structural Study of the New Cadmium Salt [(H₂L)₂][Cd₂I₆][(NO₃)₂]

et al. 2013

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“…Tetradentate L forms three fivemembered chelate rings, and only one of them is planar (r. m. s. 0.061Å for the N1 atom). The ligand has one chiral center (C12), and a new one (N3) is formed after coordination [24], however the crystals contain a racemic mixture of R,R and S,S isomers in alternate layers.…”

Section: Resultsmentioning

confidence: 99%

Complexation to Cadmium(II) of a Tetradentate Ligand Resulting from the Condensation of 2-Pyridinecarbaldehyde with N-(2- Aminoethyl)propane-1,3-diamine

et al. 2013

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The reaction of 2-pyridinecarbaldehyde with N-(2-aminoethyl)propane-1,3-diamine in a 2 : 1 molar ratio under microwave irradiation gave 2-(2-(pyridin-2-yl)-tetrahydropyrimidin-1(2H)-yl)-N-(pyridin-2-ylmethylene)ethanamine (L) as a mixture with the isomer 3-(2-(pyridin-2-yl)imidazolidin-1-yl)-N-(pyridin-2-ylmethylene)propan-1-amine (L * ). The molecules were characterized by elemental analyses and spectroscopic methods. Percentages of L and L * were evaluated through integration of selected 1 H NMR signals. The cadmium iodide complex of L, [Cd(L)I 2 ]·H 2 O (1), was prepared and identified by elemental analysis, FT-IR, Raman, and 1 H NMR spectroscopy, and single-crystal X-ray diffraction. In the crystal structure of 1 the cadmium atom with four coordinated nitrogen atoms and two iodide ions has a distorted octahedral geometry. A water molecule is also incorporated in the crystal network. Several hydrogen bonds including N-H···O, C-H···O, C-H···I, and O-H···I interactions are present in the crystal structure of 1.

“…Two water O atoms that connect Cl2 and O3 atoms by hydrogen bonding act as proton donor and acceptor at the same time. The structure with partial hydrogen bonding grows to a 3D network by participation of uncounted short contacts such as C(sp 2 )-H···π [28] between the imidazo[1,5-a]pyridine portion and the pyridine ring, C(sp 2 )-H···Cl and O-H···Cl.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Crystallographic and Spectral Characterization of a Cadmium Chloride Complex Containing a Novel Imidazo[1,5-a]Pyridine Derivative

et al. 2012

Self Cite

The reaction between 2-(2-amino-ethylamino)ethanol and pyridine-2-carbaldehyde in a 1 : 3 molar ratio gave 3-(pyridin-2-yl)-1-(pyridin-2-ylmethyl)imidazo[1,5-a]pyridine (PPIP) which was characterized by elemental analysis and spectroscopic methods. The study of CSD-deposited structures revealed that PPIP is a new derivative of imidazo[1,5-a]pyridine. The cadmium chloride complex of this ligand [Cd(PPIP)Cl 2 ][Cd(PPIP)Cl 2 ] ·3H 2 O (1) was prepared and identified by elemental analysis, FT-IR, Raman and 1 H NMR spectroscopy, and single-crystal X-ray diffraction. In the crystal structure of 1, there are two cadmium complexes with slightly different coordination bond lengths and angles. Also water molecules are incorporated in the crystal network. The geometry around the cadmium atom which is coordinated by two pyridine and one imine nitrogen atoms and two chloride ions is distorted square pyramidal. All bond lengths compare well with CSD averages of similar structures. The hydrogen bonds including O-H···Cl and O-H···O present in the crystal structure of 1 are also comparable to those in analogs.