Regio- and stereo-selective polymerization of 1,3-butadiene catalyzed by phosphorus–nitrogen PN3-pincer cobalt(ii) complexes

2016 ◽  
Vol 45 (48) ◽  
pp. 19399-19407 ◽  
Author(s):  
Dirong Gong ◽  
Xuequan Zhang ◽  
Kuo-Wei Huang
Keyword(s):  
Elemental Analysis ◽  
Cobalt Complexes ◽  
X Ray ◽  
New Family ◽  
Ft Ir

A new family of cobalt complexes (CoCl2-H, CoCl2-Me, CoCl2-iPr, CoBr2-H, CoBr2-Me, CoBr2-iPr, CoI2-H, CoI2-Me, and CoI2-iPr) supported by a PN3 ligand (6-(N,N′-di-t-butylphosphino)-2-pyrazol-yl-aminopyridine) have been prepared and fully characterized by FT-IR, elemental analysis, and X-ray analysis.

New Cu(II), Co(II), and Ni(II) complexes with thieno[2,3-b]pyridine and 2-methylthieno[2,3-b]pyridine as ligands: Synthesis and crystal structures

2009 ◽  
Vol 63 (3) ◽  
Author(s):  
Ján Halgaš ◽  
Viera Kolenová ◽  
Zuzana Števíková ◽  
Lucia Perašínová ◽  
Jozef Kožíšek
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Crystal Structures ◽  
Elemental Analysis ◽  
Zinc Chloride ◽  
Coordination Compounds ◽  
Biological Activities ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

AbstractAlthough thienopyridines attract attention because of their biological activities, they have not been used as ligands in coordination compounds. Thieno[2,3-b]pyridine was prepared by known procedures; by reduction of 2-nitrothiophene, and reaction of the resulting 2-thienyl ammonium salt with malondialdehyde tetramethylacetal in the presence of zinc chloride. The same procedure was used for the preparation of a new derivative, 2-methylthieno[2,3-b]pyridine, starting from 2-methyl-5-nitrothiophene. The thienopyridines were used in the synthesis of coordination compounds. Chlorides, isothiocyanates, acetates, and chloroacetates of copper(II), nickel(II), or cobalt(II) were used as starting salts. The prepared complexes were characterized by elemental analysis and FT IR. Structures of the four complexes were determined by single-crystal X-ray diffraction analysis.

1,3,5-Tris[(trimethylstannyl)ethynyl]- 1,3,5-trimethyl-1,3,5-trisilacyclohexane

2016 ◽  
Vol 71 (1) ◽  
pp. 81-84 ◽  
Author(s):  
Eugen Weisheim ◽  
Hans-Georg Stammler ◽  
Norbert W. Mitzel
Keyword(s):  
Mass Spectrometry ◽  
Ir Spectroscopy ◽  
Single Crystal ◽  
Elemental Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

AbstractThe reaction of 1,3,5-triethynyl-1,3,5-trimethyl- 1,3,5-trisilacyclohexane with (dimethylamino)trimethylstannane afforded 1,3,5-tris[(trimethylstannyl)ethynyl]- 1,3,5-trimethyl-1,3,5-trisilacyclohexane with tin-functionalised ethynyl groups. The compound was characterized by single-crystal X-ray diffraction, elemental analysis, mass spectrometry, NMR and FT-IR spectroscopy.

Synthesis, structure and magnetism of a new ionic pentanuclear iron cluster

2020 ◽  
Vol 76 (7) ◽  
pp. 690-694
Author(s):  
Qianjun Deng ◽  
Jiming Wang ◽  
Guangzhao Li ◽  
Shuhua Zhang
Keyword(s):  
Thermogravimetric Analysis ◽  
Ir Spectroscopy ◽  
Elemental Analysis ◽  
Synthesis Methods ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Iron Cluster ◽  
X Ray ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A new ionic pentanuclear FeIII cluster, namely, triethylazanium tetrakis(μ2-5-amino-1,2,3,4-tetrazolido)tetrakis(μ3-4-chloro-2-{[(1H-tetrazol-1-id-5-yl)imino]methyl}phenolato)di-μ3-oxido-pentairon(III) acetonitrile monosolvate monohydrate, (C6H16N)[Fe5(C8H4ClN5O)4(CH2N5)4O2]·CH3CN·H2O, was synthesized using microvial synthesis methods and characterized by elemental analysis, FT–IR spectroscopy, single-crystal X-ray diffraction and thermogravimetric analysis. Magnetic studies reveal that the complex displays dominant antiferromagnetic intracluster interactions between the FeIII ions through the μ3-oxide bridges.

scholarly journals Synthesis, crystal structure and properties of [Co(L)2](ClO4)2 (L=1,3-bis(1H-benzimidazol-2-yl)-2-oxapropane)

2015 ◽  
Vol 80 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Aydin Tavman ◽  
Cigdem Sayil
Keyword(s):  
Thermogravimetric Analysis ◽  
Elemental Analysis ◽  
Analysis Data ◽  
Molar Conductivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coordination Bonding ◽  
Ft Ir ◽  
Uv Visible ◽  
Ethereal Oxygen

The reaction of 1,3-bis(1H-benzimidazol-2-yl)-2-oxapropane (L) with Co(ClO4)2?6H2O in absolute ethanol produces di[1,3-bis(1H-benzimidazol-2-yl)-2-oxapropane-k2N,N?]cobalt(II)diperchlorate chelate complex ([Co(L)2](ClO4)2, 1). The complex 1 was characterized by elemental analysis, magnetic moment, molar conductivity, thermogravimetric analysis, FT-IR, UV-visible, mass spectrometry, and its solid state structure was determined by single crystal X-ray diffraction. According to the thermogravimetric analysis data, there is no any water coordinated or uncoordinated in 1 as well as elemental analysis. The complex 1 has 1:2 M:L ionic characteristic according to the molar conductivity. In the complex, the distances between the cobalt and the ethereal oxygen atoms (Co1-O2: 2.805(3); Co2-O1: 2.752(2) ?) show the semi-coordination bonding and the Co(II) ion is six-coordinated with a N4O2 ligand set, resulting in a distorted octahedron.

Synthesis and characterization of a macrocyclic copper complex containing the 14-membered 1,3,5,8,10,12-hexaazacyclotetradecane unit

2017 ◽  
Vol 72 (2) ◽  
pp. 115-118 ◽  
Author(s):  
Mohammad Hakimi ◽  
Zahra Mardani ◽  
Keyvan Moeini ◽  
Fabian Mohr
Keyword(s):  
Raman Spectroscopy ◽  
Elemental Analysis ◽  
Copper Complex ◽  
Copper Atom ◽  
Octahedral Geometry ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

AbstractIn this work, a new macrocyclic copper complex, [Cu(ACE)(SCN)2]; ACE: 1,3,6,10,12,15-hexaazatricyclo[13.3.1.16,10]eicosane, was prepared and characterized by elemental analysis, FT-IR, Raman spectroscopy and single-crystal X-ray diffraction. X-ray analysis of [Cu(ACE)(SCN)2] reveals an elongated octahedral geometry around the copper atom in a centrosymmetric CuN6 environment.

scholarly journals Different Polyoxometalate Structures Obtained from the Na11H[H(2-x)Bi2W20O70(HWO3)x]·46H2O(x=1.4).

2018 ◽  
Vol 1 (2) ◽  
pp. 93-100
Author(s):  
Suhair Atta
Keyword(s):  
Single Crystal ◽  
Self Assembly ◽  
Multiple Testing ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray ◽  
Space Groups ◽  
Cell Parameters ◽  
New Family ◽  
Ft Ir

In the supramolecular chemistry world, Polyoxometalates (POMs) are considered as a new family of inorganic molecular containers, construct itself by self-assembly reaction from very small units, to form a cluster with unique structural and properties. three structures reported in this paper - differ in their unit cell parameters and also differ from the well-known - as the result of reaction of the Na11H[H(2- x)Bi2W20O70(HWO3)x]·46H2O (x=1.4) with Ca ion at different pH conditions. These structures are [Ca(H2O)7]2[Na(H2O)2]2[HBi2W20O70(HWO3)].14H2O(1), H2[NH4]10[HBi2W20O70(HWO3)] (2), and [NH4]6[Na(H2O)4]2[Ca(H2O)4]2[W12O42].2H2O (3). The last one is bismuth-free and it is formed through reassembly of the precursor. Full structural characterization was made by multiple testing techniques such as single-crystal X-ray diffraction, UV-visible spectroscopy, FT-IR, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The single-crystal X-ray diffraction results for the three compounds are as follows:(1), Triclinic, space group P-1, while (2) and (3) crystallize in monoclinic space groups C2/m and P21/n respectively.

A novel fluorescein-based colorimetric probe for Cu2+ detection

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59677-59683 ◽  
Author(s):  
Xin Wu ◽  
Xiaojuan Gong ◽  
Wenjuan Dong ◽  
Jun Ma ◽  
Jianbin Chao ◽  
...  
Keyword(s):  
Single Crystal ◽  
Elemental Analysis ◽  
Single Crystal Diffraction ◽  
Colorimetric Probe ◽  
X Ray ◽  
Ft Ir

A new colorimetric probe, 5-chlorosalicylaldehyde fluorescein hydrazone (CSFH), has been synthesized and characterized by, FT-IR, NMR, mass elemental analysis and X-ray single crystal diffraction.

A Fe(bipy)2 Unit Fused to a Keggin Polyoxotungstate Anion

2010 ◽  
Vol 63 (2) ◽  
pp. 252 ◽  
Author(s):  
Jingli Xie ◽  
Ryan Gilbert-Wilson ◽  
Boujemaa Moubaraki ◽  
Keith S. Murray ◽  
Anthony G. Wedd
Keyword(s):  
Hydrothermal Synthesis ◽  
Ir Spectroscopy ◽  
Single Crystal ◽  
Hybrid Materials ◽  
Elemental Analysis ◽  
X Ray ◽  
X Ray Crystallography ◽  
Nmr Spectrometry ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Two new hybrid materials [Fe(bipy)3]3[ZnW12O39(OH)Fe(bipy)2(H2O)]2 and [Fe(bipy)3]2[CoW12O40] were obtained by hydrothermal synthesis. They contain [Fe(bipy)3] n+ (bipy = 2,2′-bipyridyl; n = 2 or 3) cations and Keggin-type polyoxotungstate anions. Both have been characterized by elemental analysis, FT-IR spectroscopy, 1H-NMR spectrometry, and single crystal X-ray crystallography. The anion in the former salt features [FeII(bipy)2(OH2)]2+ units covalently bound via a W=O-Fe bridge to the protonated anion [ZnW12O39(OH)]5–. The latter salt contains discrete [CoW12O40]6– anions.

scholarly journals Synthesis, Characterization and Photo-Physical Properties of Europium(III) and Terbium(III) Complexes with Thiosemicarbazones

2020 ◽  
Vol 32 (4) ◽  
pp. 952-958
Author(s):  
Ananya Vishwakarma ◽  
S.K. Sengupta ◽  
O.P. Pandey
Keyword(s):  
Physical Properties ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Emission Spectra ◽  
X Ray Diffraction ◽  
Excitation Spectra ◽  
X Ray ◽  
Intense Peak ◽  
Ft Ir

Europium(III) and Terbium(III) complexes of type [Eu(L)Cl(H2O)2] and [Tb(L)OAc(H2O)2] (H2L = thiosemicarbazone ligands derived from substituted thiosemicarbazide and benzil/diacetyl) were synthesized. The ligands and synthesized complexes were characterized on the basis of elemental analysis, FT-IR and 1H NMR and X-ray diffraction studies. Photo-physical properties such as excitation spectra, emission spectra and luminescence curves of complexes were investigated. The most intense peak of Eu3+ ion found at 618 nm attributed to 5D0 → 7F2 transition and peak of Tb3+ ion at 549 nm attributed to 5D4 →7F5 transition.

Synthesis and crystal structures of two new lead(II) complexes with the pincer-type ligand 4′-(4-chlorophenyl)-2,2′:6′,2″-terpyridine (Cl-Ph-tpy): subtle interplay of weak intermolecular interactions

2020 ◽  
Vol 75 (12) ◽  
pp. 1043-1048
Author(s):  
Farzin Marandi ◽  
Harald Krautscheid
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Central Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Weak Intermolecular Interactions ◽  
Binuclear Structure ◽  
Ft Ir

AbstractA dinuclear and a tetranuclear complex of lead(II) with the pincer-type ligand 4′-(4-chlorophenyl)-2,2′:6′,2″-terpyridine (Cl-Ph-tpy), [Pb2(Cl-Ph-tpy)2(μ-I)2I2] (1) and [Pb4(Cl-Ph-tpy)4(μ-Br)4(μ-OH2)Br4]·2CH3OH (2), have been synthesized and characterized by elemental analysis, FT-IR and 1H NMR spectroscopy, and by single-crystal X-ray diffraction. In the binuclear structure of 1, the Pb atom has a hemidirected PbN3I3 environment with a Pb(μ-I)2Pb central unit. In the tetranuclear structure of 2, two crystallographically independent Pb(II) centres having hemidirected PbN3Br3 and PbN3OBr2 environments are connected to Pb(μ-Br)Pb(μ-Br)2(μ-OH2)Pb(μ-Br)Pb chains. The supramolecular features in 1 and 2 are supported through weak but directional C–H···Cl, C–H···I and C–H···Br, C–H···O, O–H···Br, and O···Br interactions and aromatic π-π stacking.

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