Syntheses and Characterization of New Mixed-Ligand Mercury(II) Complexes, Hg(bpy)n(SCN)X (X = CH3COO–, NO3– and ClO4–), Crystal Structure of [Hg(bpy)2(SCN)]NO3

2004 ◽  
Vol 59 (10) ◽  
pp. 1109-1113 ◽  
Author(s):  
Ali Reza Mahjoub ◽  
Ali Morsali ◽  
Ramin Ebrahim Nejad
Keyword(s):  
Mixed Ligand ◽  
Lead Atom ◽  
Aromatic Rings ◽  
X Ray ◽  
X Ray Crystallography ◽  
Thiocyanate Ligand ◽  
Π Stacking Interaction ◽  
Coordinate Geometry ◽  
C Nmr

AbstractThe 1:2 and 1:1 mixed-ligand mercury(II) complexes with 2,2’-bipyridine (bpy) containing two different anions, Hg(bpy)n(SCN)X (X= CH3COO−, NO3− and ClO4−), have been synthesized and characterized by elemental analysis, and IR, 1H and 13C NMR spectroscopy. The structure of [Hg(bpy)2(SCN)]NO3 was confirmed by X-ray crystallography. The complex is monomeric and the Hg atom has an unsymmetrical five-coordinate geometry, with four nitrogen atoms of two bpy ligands and one sulfur atom of the thiocyanate ligand as donor atoms. This is in contrast to lead(II) complexes, [Pb(phen)2(NO3)(NCS)], [Pb(phen)(O2CCH3)(NCS)] where the thiocyanate ligands are coordinated to the lead atom via the nitrogen atom. There is a π −π stacking interaction between the parallel aromatic rings.

2,2'-Bipyridine Mercury(II) Complexes [Hg(bpy)(NO2)X] (X = NO2 –, SCN– , CH3COO–); Π-Π Stacking In The Crystal Structure Of [Hg(bpy)(NO2)2]

2005 ◽  
Vol 60 (3) ◽  
pp. 289-293 ◽  
Author(s):  
Ali Ramazani ◽  
Ali Morsali ◽  
Leila Dolatyari ◽  
Bijan Ganjeie
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Aromatic Rings ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Π Stacking ◽  
Π Stacking Interaction ◽  
Coordinate Geometry ◽  
C Nmr

The mercury(II) complexes of 2,2′-bipyridine (bpy), [Hg(bpy)(NO2)2], [Hg(bpy)(NO2) (CH3COO)], and [Hg(bpy)(NO2)(NCS)] have been synthesized and characterized by elemental analysis, IR, 1H NMR and 13C NMR spectroscopy. The structure of [Hg(bpy)(NO2)2] has been confirmed by X-ray crystallography. The complex is a monomer and the Hg atom has an unsymmetrical six-coordinate geometry, formed by two nitrogen atoms of the bpy ligand and four oxygen atoms of the two nitrite anions. There is a short intermolecular π-π stacking interaction between parallel aromatic rings

Syntheses And Characterization Of Mixed-Ligands Lead(Ii) Complexes, [Pb(bpy)(CH3COO)X] (X = I–, NO3 –, and ClO4 –), Crystal Structure Of [Pb(bpy)(NO3)(CH3COO)]N (A New 1-D Polymeric Compound)

2005 ◽  
Vol 60 (3) ◽  
pp. 300-304 ◽  
Author(s):  
Ali Morsali ◽  
Ali R. Mahjoub ◽  
Mohammad J. Soltanian ◽  
Parisa E. Pour
Keyword(s):  
Lone Pair ◽  
Aromatic Rings ◽  
Polymeric Compound ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Mixed Ligands ◽  
Π Stacking Interaction ◽  
Coordinate Geometry ◽  
C Nmr

Lead(II) complexes with 2,2′-bipyridine (bpy) containing two different anions, [Pb(bpy)(CH3- COO)X] (X = I-, NO3-, and ClO4-), have been synthesized and characterized by CHN elemental analysis, IR-, 1H NMR- and 13C NMR spectroscopy. The structure of [Pb(bpy)(ClO4)(CH3COO)]n was confirmed by X-ray crystallography. The complex is a one-dimensional polymer as a result of perchlorate ligand bridging. The Pb atom has an unsymmetrical eight-coordinate geometry. The arrangement of the bpy, acetate and nitrate ligands leaves a coordination gap at the Pb(II) ion, occupied probably by a stereo-active lone pair of electrons. There is a π- π stacking interaction between the parallel aromatic rings that may be formed by influence lone pair activity

Syntheses and Characterization of Two New Mixed-Ligand Bismuth(III) Complexes, Crystal Structure of [Bi(phen)2(NO3)(NCS)2(MeOH)]

2005 ◽  
Vol 60 (4) ◽  
pp. 389-392 ◽  
Author(s):  
Ali Morsali
Keyword(s):  
Lone Pair ◽  
Mixed Ligand ◽  
Bismuth Atom ◽  
Stacking Interactions ◽  
Coordination Geometry ◽  
Aromatic Rings ◽  
X Ray ◽  
X Ray Crystallography ◽  
Elemental Analyses

Complexes [Bi(phen)2(NO3)(NCS)2(MeOH)] and [Bi(phen)2(NO3)2(NCS)] have been synthesized and characterized by their IR spectra and elemental analyses. The structure of the [Bi(phen)2(NO3)(NCS)2(MeOH)] complex has been confirmed by X-ray crystallography. The Bi atoms are unsymmetrically eight-coordinated, N6O2. The arrangement of the ligands does not show a gap in the coordination geometry around the Bi(III) ion, indicating that its lone pair of electrons is not active. The thiocyanate ligands are coordinated to the bismuth atom via the nitrogen atom. There is π-π stacking interactions between the parallel aromatic rings belonging to adjacent chains

[Zn(phen)2(CX3COO)]+, X = H orCl; Influence of X on the Coordination Mode of the Carboxylate Group (phen = 1,10-Phenanthroline)

2005 ◽  
Vol 60 (10) ◽  
pp. 1049-1053 ◽  
Author(s):  
Zeanab Talaei ◽  
Ali Morsali ◽  
Ali R. Mahjoub
Keyword(s):  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Coordination Mode ◽  
Bidentate Ligand ◽  
Carboxylate Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Coordinate Geometry ◽  
C Nmr

Two new ZnII(phen)2 complexes with trichloroacetate and acetate anions, [Zn(phen)2(CCl3COO)- (H2O)](ClO4) and [Zn(phen)2(CH3COO)](ClO4), have been synthesized and characterized by elemental analysis, IR, 1H NMR, 13C NMR spectroscopy. The single crystal X-ray data of these compounds show the Zn atoms to have six-coordinate geometry. From IR spectra and X-ray crystallography it is established that the coordination of the COO− group is different for trichloroacetate and acetate. The former acts as a monodentate whereas the latter acts as a bidentate ligand.

scholarly journals Synthesis and characterization of a new bis-NHC palladium complex and its catalytic activity in the Mizoroki–Heck reaction

2020 ◽  
Vol 44 (11-12) ◽  
pp. 684-688
Author(s):  
Can Feng ◽  
Cheng-xin Liu ◽  
Yu-fang Wang ◽  
Jin Cui ◽  
Ming-jie Zhang
Keyword(s):  
Palladium Complex ◽  
Coupling Reaction ◽  
Aryl Halides ◽  
Heck Coupling ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Excellent Stability ◽  
C Nmr

A new bis- N-heterocyclic carbene palladium complex, (C13H9N2F2)2PdCl2, is synthesized by a three-step reaction and characterized by 1H NMR and 13C NMR spectroscopy as well as by X-ray crystallography. This new bis- N-heterocyclic carbene palladium complex has excellent stability and is capable of efficiently catalyzing the Mizoroki–Heck coupling reaction of aryl halides with acrylates.

Preparation, Spectral and Structural Characterization of Two Polymeric 1:1 Mixed Ligand Complexes of Copper(II) Azide with 4-Methylquinoline and 2-Methylpyridine

1991 ◽  
Vol 46 (5) ◽  
pp. 687-692 ◽  
Author(s):  
Mohamed A. S. Goher ◽  
Franz A. Mautner
Keyword(s):  
Columnar Structure ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Polymeric Complex ◽  
Bridging Ligands ◽  
Space Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
Centrosymmetric Dimers

Two 1:1 mixed ligand complexes of copper(II) azide with substituted quinoline and pyridine, namely catena di-μ(1,1)-azido-(4-methylquinoline)copper(II) (1) and catena di-μ(1,3)-azido-[di-μ(1,1)-azido-bis(2-methylpyridine)dicopper(II)] (2) have been prepared and characterized by X-ray crystallography.Crystal data: 1, C10H9N7Cu, space group P21/c, a = 577.8(2), b = 2202.3(5), c = 919.9(2) pm, β = 93.92(2)°, Ζ = 4, and R = 0.035 for 1293 observed MoKa data; 2, C6H7N7Cu, space group P21/a, a = 823.7(2), b = 1303.8(4), c = 895.3(3) pm, β = 112.23(2)°, Ζ = 4, and R = 0.022 for 2133 observed ΜοΚα diffractometer data. In the structure of 1, the Cu(II) has a strongly distorted trigonal bypyramidal coordination, where both azido groups function as μ(1,1) bridging ligands resulting in a columnar structure along the a axis. The polymeric complex 2 has a less distorted square pyramidal structure; one half of the azide groups act as μ(1,1) bridging ligands to form centrosymmetric dimers. These dimeric units are further connected by the remaining μ(1,3) bridging azido groups to form layers within the ab-plane. Infrared and electronic spectral data are also presented and discussed.

Isolation and Characterization of Limonoids from Kigelia africana

2013 ◽  
Vol 68 (9) ◽  
pp. 1041-1048 ◽  
Author(s):  
Bushra Jabeen ◽  
Naheed Riaz
Keyword(s):  
Dependent Manner ◽  
Concentration Dependent Manner ◽  
X Ray ◽  
X Ray Crystallography ◽  
Isolation And Characterization ◽  
Related Compounds ◽  
Absolute Stereochemistry ◽  
Cosy Nmr ◽  
C Nmr

Two new limonoids, 1-O-deacetyl-2a-methoxykhayanolide (1) and kigelianolide (2), together with deacetylkhayanolide E (3), 1-O-deacetyl-2α-hydroxykhayanolide E (4) and khayanolide B (5) were isolated from the ethyl acetate-soluble fraction of the methanolic extract of Kigelia africana. The structures of these limonoids (1-5) were elucidated by the combination of 1D (1H and 13C NMR) and 2D (HMQC, HMBC and COSY) NMR spectroscopy and mass spectrometry (EIMS, HREIMS), and in comparison with literature data of related compounds. The structure of compound 1 was further confirmed by X-ray crystallography, and the absolute stereochemistry of compounds 1 and 2 was determined by electronic circular dichroism (ECD) spectroscopy. Limonoids 1-5 showed weak inhibitory activities against the enzymes acetylcholinesterase (AChE), butyrycholinesterase (BChE) and lipoxygenase (LOX) in a concentration-dependent manner with IC50 values in the ranges 137.5 - 225.2 μM for AChE, 185.4 - 241.5 μM for BChE and 281.2 - 189.6 μM for LOX

2,9-Dimethyl-1,10-phenanthroline as Ligand in the Holo- and Hemidirected 1:1 and 1:2 Lead(II) Complexes

2005 ◽  
Vol 60 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Ali Morsali
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Elemental Analysis ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Coordinate Geometry ◽  
C Nmr

1:1 and 1:2 lead(II) complexes with 2,9-dimethyl-1,10-phenanthroline (Dmphen), {[Pb(Dmphen)(NO3)n] and [Pb(Dmphen)2(ClO4)2]} have been synthesized and characterized by CHN elemental analysis, IR, 1H NMR, 13C NMR and 207Pb NMR spectroscopy. The structure of these complexes was confirmed by X-ray crystallography. The single crystal X-ray data of [Pb(Dmphen)(NO3)n] show the complex to be polymeric and the Pb atom to have an unsymmetrical eight-coordinate geometry, the coordination being holodirected, whereas the [Pb(Dmphen)2(ClO4)2] complex is monomeric and the Pb atom has an unsymmetrical eight-coordinate geometry with the coordination hemidirected.

Syntheses and Characterization of Two New Lead(II) Acetate Complexes, Pb(L)(CH3COO)2, L = 2,2':6',2''-Terpyridine (tpy) and 2,4,6-Tris(2-pyridyl)- 1,3,5-Triazine (trz), Crystal Structure of Pb(tpy)(CH3COO)2

2004 ◽  
Vol 59 (9) ◽  
pp. 1039-1044 ◽  
Author(s):  
Ali Morsali
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Lone Pair ◽  
Aromatic Rings ◽  
X Ray ◽  
Π Stacking ◽  
Coordinate Geometry ◽  
Oxygen Atoms

Lead(II) complexes with 2,2':6',2''-terpyridine (tpy) and 2,4,6-tris(2-pyridyl)-1,3,5-triazine (trz) ligands, [Pb(tpy)(CH3COO)2] and [Pb(trz)(CH3COO)2], have been synthesized and characterized by IR, CHN elemental analysis and 207Pb NMR. The structure of Pb(tpy)(CH3COO)2 was confirmed by single crystal X-ray data. The complex is monomeric and the Pb atom has an unsymmetrical seven-coordinate geometry, being coordinated by three nitrogen atoms of the 2,2’:6’,2”-terpyridine ligand and four oxygen atoms of the CH3COO− ligands. The arrangement of the ligands in the two complexes exhibits a coordination gap around the Pb(II) ion, occupied possibly by a stereoactive lone pair on lead(II). The coordination around lead atoms is hemidirected. The parallel aromatic rings in Pb(tpy)(CH3COO)2 show π − π stacking.

Crystal and solution structure of (E)-1,2-bis(ethylsulphonyl)cyclobutane-1,2-dicarbonitrile

1989 ◽  
Vol 54 (12) ◽  
pp. 3253-3259
Author(s):  
Jaroslav Podlaha ◽  
Miloš Buděšínský ◽  
Jana Podlahová ◽  
Jindřich Hašek
Keyword(s):  
Hydrogen Peroxide ◽  
Solution Structure ◽  
Peroxide Oxidation ◽  
X Ray ◽  
X Ray Crystallography ◽  
Nmr Study ◽  
Hydrogen Peroxide Oxidation ◽  
Unusual Product ◽  
C Nmr

The unusual product of the reaction of 2-chloroacrylonitrile with ethane thiol and following hydrogen peroxide oxidation was found to be (E)-1,2-bis(ethylsulphonyl)cyclobutane-1,2-dicarbonitrile by means of X-ray crystallography. 1H and 13C NMR study of this compound has proven the same conformation of the molecule in solution.

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