Cu(i) complexes obtained via spontaneous reduction of Cu(ii) complexes supported by designed bidentate ligands: bioinspired Cu(i) based catalysts for aromatic hydroxylation

2020 ◽  
Vol 49 (39) ◽  
pp. 13829-13839
Author(s):  
Sheela Kumari ◽  
Sethuraman Muthuramalingam ◽  
Ashish Kumar Dhara ◽  
U. P. Singh ◽  
Ramasamy Mayilmurugan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Bidentate Ligands ◽  
X Ray ◽  
Spontaneous Reduction ◽  
Hydroxylation Of Benzene ◽  
Aromatic Hydroxylation ◽  
Direct Hydroxylation

Cu(i) complexes were synthesized via spontaneous reduction and X-ray crystal structure of complex 1 was determined. Direct hydroxylation of benzene to phenol afforded selectivity up to 98%. KIE values of 1.69–1.71 supported radical based mechanism.

Crystal structure of fac-Tris(pentane-2,3,4-trione 3-oximato)cobalt(III)

1978 ◽  
Vol 31 (11) ◽  
pp. 2437 ◽  
Author(s):  
BN Figgis ◽  
CL Raston ◽  
RP Sharma ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Bidentate Ligands ◽  
X Ray Diffraction ◽  
X Ray ◽  
Independent Molecules

The crystal structure of the title compound has been determined by single-crystal X-ray diffraction at 295 K and refined by least squares to a residual of 0.058 for 2363 'observed' reflections. Crystals are triclinic, Pī, Z 4, a 15.517(8), b 11.772(7), c 11.282(7) Ǻ, α 112.10(4), β 94.80(3), γ 90.60(4)°. <Co-N, O>| distances are 1.883, 1.925 Ǻ respectively, the disposition of the three bidentate ligands within each of the two independent molecules being fac.

Synthesis of bis- or tris(pentafluorophenyl) thallium(III) complexes with bidentate ligands. X-ray crystal structure of [Tl(C6F5)2(acac){(O)Ph2PCH2PPh2(O)}]

1994 ◽  
Vol 215 (1-2) ◽  
pp. 229-233 ◽  
Author(s):  
Eduardo J. Fernández ◽  
Peter G. Jones ◽  
Antonio Laguna ◽  
Aránzazu Mendía
Keyword(s):  
Crystal Structure ◽  
Bidentate Ligands ◽  
X Ray

Doubly Pyridazine-bridged Dicobalt(II) and Dinickel(II) Side-by-side Complexes of Variously Substituted Conjugated Bis-bidentate Ligands

2010 ◽  
Vol 63 (5) ◽  
pp. 779 ◽  
Author(s):  
Jason R. Price ◽  
Yanhua Lan ◽  
Boujemaa Moubaraki ◽  
Keith S. Murray ◽  
Sally Brooker
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Metal Ions ◽  
Structure Determination ◽  
Bidentate Ligands ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Clear Cut ◽  
Magnetic Analysis ◽  
Solvent Molecules

A family of six acyclic bis-bidentate Schiff base ligands, Lx (prepared by condensation of 3,6-diformylpyridazine with a range of anilines: 2,4-dimethylaniline Lo,p-Me; 3,5-dichloroaniline Lm,m-Cl; 3,5-difluoroaniline Lm,m-F; p-toluidine Lp-Me; 4-aminophenol Lp-OH; 2,4,6-trimethylaniline Lo,o,p-Me), was complexed, 1:1, with cobalt(ii) or nickel(ii) perchlorate or tetrafluoroborate in refluxing dry acetonitrile. A family of dinuclear, doubly pyridazine-bridged complexes, M2II(Lx)2(solvent)n(ClO4)4 and [Ni2(Lo,o,p-Me)2(2H2O)4](BF4)4, resulted. An X-ray crystal structure determination on [Co2II(Lo,o,p)2(H2O)2(MeCN)2](ClO4)4·MeCN confirmed that it has the expected side-by-side architecture with axial solvent molecules completing the octahedral coordination sphere of the two cobalt(ii) ions. Magnetic analysis showed that the pyridazine bridges mediate weak-to-medium antiferromagnetic interactions between the metal ions. Specifically, for the cobalt(ii) complexes J was in the range –12 to –6 cm–1, while for the nickel(ii) complexes J was in the range –22 to –17 cm–1. There is no clear cut correlation of J values with electron-donating or -attracting properties of ligand substituent peripheral groups, although it is noted that the smallest J occurs in both the NiNi and CoCo families for the ligand Lo,o,p-Me.

Crystal Structure of trans- [ReCl2(dppp)2]Cl · ½H2O (dppp = 1,3-bis(diphenylphosphino)propane)

2002 ◽  
Vol 57 (10) ◽  
pp. 1189-1190
Author(s):  
Oscar E. Piro ◽  
Dinorah Gambino ◽  
Julio Benítez ◽  
Eduardo Kremer ◽  
Enrique J. Baran
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Chloride Ions ◽  
Bidentate Ligands ◽  
Space Group ◽  
X Ray

The crystal structure of trans-[ReCl2(dppp)2]- Cl · ½H2O (dppp = 1,3-bis(diphenylphosphino)- propane), a potentially useful radiopharmaceutical agent, was determined by single crystal X-ray diffractometry. It belongs to the tetragonal space group P4̄ with Z = 2. The Re(III) ion is in a quasioctahedral environment coordinated to a pair of symmetry related dppp molecules, acting as bidentate ligands, and two axial chloride ions.

N,N-Disubstituierte Nʹ-Ferrocenoylthioharnstoffe als zweizähnige Komplexliganden für Übergangsmetallionen. Kristallstruktur von Bis-(N,N-diethyl-Nʹ-ferrocenoylthioureato)nickel(II) / N,N-Disubstituted Nʹ-Ferrocenoyl Thioureas as Bidentate Ligands for Transition Metal Ions. Crystal Structure of Bis-(N,N-diethyl-Nʹ-ferrocenoylthioureato)nickel(II)

1995 ◽  
Vol 50 (11) ◽  
pp. 1679-1684 ◽  
Author(s):  
Oliver Seidelmann ◽  
Lothar Beyer ◽  
Rainer Richter
Keyword(s):  
Crystal Structure ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Potassium Thiocyanate ◽  
Bidentate Ligands ◽  
Space Group ◽  
X Ray

N,N-diethyl-Nʹ-ferrocenoyl-thiourea and N-(morpholino-thiocarbonyl)ferrocenecarboxylic amide have been prepared by the reaction of ferrocenoyl chloride with potassium thiocyanate and the respective amine in dry acetone. These bidentate ligands yield neutral heterometalIic complexes with Ni(II), Cu(II), Mn(II) and Co(III). The dark brown air stable crystals of bis-(N,N-diethyl-Nʹ-ferrocenoylthioureato)nickel(II) were characterized by X-ray structure de­termination. Lattice dimensions: a = 1870.9(1), 6= 1161.5(1), c = 1491.4(1) pm; space group Pca21, Z = 4, R = 0.030 for 5707 observed reflections.

Neutral and anionic derivatives of toluene-3,4-dithiolatocadmium(II); the crystal structure of di(tetraphenylarsonium) bis(toluene-3,4-dithiolato)cadmate(II)

1983 ◽  
Vol 61 (6) ◽  
pp. 1146-1152 ◽  
Author(s):  
Luis Bustos ◽  
Masood A. Khan ◽  
Dennis G. Tuck
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Least Squares ◽  
Lewis Acid ◽  
Bidentate Ligands ◽  
X Ray ◽  
X Ray Crystallography ◽  
Neutral Bidentate ◽  
Derivatives Of

Cadmium(II) chloride reacts with toluene-3,4-dithiol (H2TDT) to give Cd (TDT), which is apparently a homopolymer in the solid state. Adducts with neutral monodentate and bidentate donors have been prepared. The structure of the salt (Ph4As)2 [Cd(TDT)2] was determined by X-ray crystallography. Crystals of this compound are monoclinic (P21/c), with a = 23.032 (4) Å, b = 12.396(4) Å, c = 22.529(5) Å, β = 111.106(2)°. The structure was refined by least-squares methods to a final R-valueof 0.0469 for 2523 "observed" reflections. The anion is a distorted tetrahedral, mononuclear species with Cd—S bond distances ranging from 2.488(5) Å to 2.531(4) Å. This anion is also a Lewis acid, forming complexes of the type [Cd(TDT)2L]2− with neutral bidentate ligands.

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