Synthesis, characterization and photophysical properties of some 3,3′-bisindolyl(aryl)methanes

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32839-32848 ◽  
Author(s):  
Abdollah Neshat
Keyword(s):  
Nmr Spectroscopy ◽  
Photophysical Properties ◽  
X Ray ◽  
X Ray Crystallography ◽  
C Nmr

A series of 3,3′-bisindolyl(aryl)methanes were synthesized and fully characterized by a combination of1H and13C NMR spectroscopy and in one case using X-ray crystallography.

[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.

1,2-Bis(1-aryl-3-alkyltriazen-3-yl)ethanes and related compounds

1998 ◽  
Vol 76 (1) ◽  
pp. 125-135 ◽  
Author(s):  
Donald L Hooper ◽  
Ian R Pottie ◽  
Marc Vacheresse ◽  
Keith Vaughan
Keyword(s):  
Nmr Spectroscopy ◽  
Line Broadening ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Ir And Nmr Spectroscopy ◽  
Diazonium Coupling ◽  
Significant Line ◽  
Related Compounds ◽  
C Nmr

A series of novel bistriazenes, the 1,2-bis(1-aryl-3-methyltriazen-3-yl)ethanes, Ar-N T N-NMe-CH2CH2-NMe-N T N-Ar, have been synthesized by diazonium coupling with N,N'-dimethylethylenediamine. These bistriazenes are stable crystalline compounds and have been unequivocally characterized by IR and NMR spectroscopy (1H and 13C), and elemental analysis. The structures of two compounds in the series have been confirmed by X-ray crystallography. The 1H NMR spectra show significant line broadening of the N-methyl resonances arising from the restricted rotation around the N2-N3 bond of the triazene units. The presence of strongly electron-withdrawing groups on the aryl ring restricts the rotation to the point where the N-methyl signals of the rotamers are distinct even at room temperature; four resonances of the N-methyl signal are clearly evident and these can be assigned to the anti-anti, syn-syn, and syn-anti conformations of the bistriazene. Diazonium coupling with N,N'-diethylethylenediamine affords the N,N'-diethyl homologues of the bistriazenes, which have been similarly characterized. As model compounds to assist in spectroscopic analysis, a series of related triazenes, the 1-(1-aryl-3-methyltriazen-3-yl)-N,N-dimethyl-2-ethanamines, were prepared by diazonium coupling with N,N,N'-trimethylethylenediamine. These dialkyltriazenes exist mainly as oils, but characterization was achieved by IR, 1H NMR, and 13C NMR spectroscopy, also showing the presence of two rotamers in solution when strongly electron-withdrawing substituents are bonded to the aryl moiety.Key words: triazene, bistriazene, diazonium, ethylenediamine, molecular dynamics, NMR.

Synthesis of novel α-aminoecdysteroids via regio- and stereoselective oximation/hydrogenation of 20-hydroxyecdysone derivatives

2017 ◽  
Vol 95 (2) ◽  
pp. 130-133 ◽  
Author(s):  
Rimma G. Savchenko ◽  
Svetlana A. Kostyleva ◽  
Ekaterina S. Meshcheryakova ◽  
Leonard M. Khalilov ◽  
Lyudmila V. Parfenova ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Two Dimensional ◽  
One Dimensional ◽  
X Ray ◽  
X Ray Crystallography ◽  
C Nmr

Oximation of 20-hydroxyecdysone oxo derivatives proceeds regio- and stereoselectively and provides (E)-configured oximes in quantitative yields. The Ni–Ra-catalyzed hydrogenation of the oximes affords novel α-aminoecdysteroids with the unchanged 14α-hydroxy-7-en-6-on native chromophore of ecdysteroids. The structures of synthesized compounds were confirmed by the means of homo- and heteronuclear one-dimensional and two-dimensional 1H and 13C NMR spectroscopy and X-ray crystallography.

Synthesis and Crystal Structure of Lead(II) Thenoyltrifluoroacetonate Complexes with Substituted 2,2' -Bipyridines: Interplay of Intermolecular Interactions in Crystals

2010 ◽  
Vol 65 (2) ◽  
pp. 128-134 ◽  
Author(s):  
Farzin Marandi ◽  
Zahra Nikpey ◽  
Jia Hao Goh ◽  
Hoong-Kun Fun
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Nmr Spectroscopy ◽  
Intermolecular Interactions ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
X Ray Crystallography ◽  
C Nmr

Three substituted 2,2'-bipyridine adducts of lead(II) thenoyltrifluoroacetonate, [Pb(4,4'-dm-2,2’- bpy)(ttfa)2]2, 1, [Pb(5,5' -dm-2,2’-bpy)(ttfa)2]2, 2, and [Pb(4,4'-dmo-2,2’-bpy)(ttfa)2], 3, (4,4’ -dm- 2,2’-bpy, 5,5’-dm-2,2’-bpy, 4,4’-dmo-2,2’-bpy and ttfa are the abbreviations for 4,4’-dimethyl-, 5,5’-dimethyl-, and 4,4’-dimethoxy-2,2’-bipyridine, and thenoyltrifluoroacetonate, respectively) have been synthesized, characterized by elemental and thermal analysis, IR and 1H- and 13C-NMR spectroscopy, and studied by X-ray crystallography. The supramolecular features in these complexes are guided/controlled by weak directional intermolecular interactions.

Structure and spectroscopy of uranyl salicylaldiminate complexes

2013 ◽  
Vol 101 (10) ◽  
pp. 631-636 ◽  
Author(s):  
A. L. Tamasi ◽  
C. L. Barnes ◽  
J. R. Walensky
Keyword(s):  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Coordination Sphere ◽  
Ancillary Ligand ◽  
Schiff Base Ligands ◽  
Uranyl Complexes ◽  
X Ray ◽  
X Ray Crystallography ◽  
Chloride Ligand ◽  
C Nmr

Summary The synthesis of uranyl complexes coordinated to tridentate, monoanionic salicylaldiminate (Schiff base) ligands was achieved by the reaction of UO2Cl2(THF)3, 1, with one equivalent of the corresponding sodium salicylaldiminate salts affording [(C9H6N)N=C(H)C6H2t Bu2O]UO2Cl(THF), 2, [(NC5H4)N=C(H)C6H2 t Bu2O]UO2Cl(THF), 3, and [(C6H4SCH3)N=C(H)C6H2tBu2O]UO2Cl(THF), 4. These are uncommon examples of uranyl complexes with a monoanionic ancillary ligand to stabilize the coordination sphere and one chloride ligand. Compounds 2-4 have been characterized by 1H and 13C NMR spectroscopy as well as IR and UVVis spectroscopy and their structures determined by X-ray crystallography.

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

scholarly journals Synthesis and fluorescence studies of novel bisarylmethylidene derivatives of 2-methoxy-2-methyl-1,3-dioxan-5-one

2017 ◽  
Vol 95 (7) ◽  
pp. 785-791
Author(s):  
Mohammad M. Mojtahedi ◽  
Kiana Darvishi ◽  
M. Saeed Abaee ◽  
Mohammad R. Halvagar
Keyword(s):  
Nmr Spectroscopy ◽  
Room Temperature ◽  
General Procedure ◽  
Photophysical Properties ◽  
Chromatographic Separations ◽  
X Ray ◽  
Fluorescence Studies ◽  
X Ray Crystallography ◽  
High Yields ◽  
Derivatives Of

The first general procedure is described for the synthesis of novel bisarylmethylidenes of 2-methoxy-2-methyl-1,3-dioxan-5-one 1. Thus, several derivatives of 3 are obtained rapidly in high yields by reacting 1 with different aldehydes in the presence of catalytic quantities of pyrrolidine in EtOH at room temperature. Upon completion of the reactions, products are obtained directly by spontaneous precipitation avoiding time consuming and expensive chromatographic separations. All products were characterized by proton and carbon NMR spectroscopy methods, and in one case, the proposed structure was elucidated by X-ray crystallography, confirming the Z stereochemistry for the olefinic C=C bonds. Due to showing different colours in solid and solution states, products were studied for their photophysical properties as well.

Structural and spectral study of coordination of 4,4′-dimethoxy-2,2′-bipyridine toward Zn(II) and Cd(II) containing thiocyanato or azido ligands

2016 ◽  
Vol 71 (9) ◽  
pp. 959-965 ◽  
Author(s):  
Farzin Marandi ◽  
Keyvan Moeini ◽  
Hadi Amiri Rudbari
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
X Ray ◽  
X Ray Crystallography ◽  
Distorted Octahedral ◽  
Ft Ir ◽  
New Compounds ◽  
C Nmr

AbstractThree new compounds of zinc(II) and cadmium(II) with the ligand 4,4′-dimethoxy-2,2′-bipyridine (4,4′-dmo-2,2′-bpy), including cis-[Zn(4,4′-dmo-2,2′-bpy)2(SCN)2] (1), cis-[Cd(4,4′-dmo-2,2′-bpy)2(SCN)2] (2), and [Cd3(4,4′-dmo-2,2′-bpy)3(N3)5(OAc)]n (3), have been obtained as white single crystals by the branched tube method and characterized by elemental analysis, FT-IR and 1H, 13C NMR spectroscopy, and X-ray crystallography. Single-crystal structure analyses of the isostructural complexes 1 and 2 showed distorted octahedral geometry for zinc(II) and cadmium(II) with ZnN6 and CdN6 environments. Complex 3 reveals a rare coordination polymer containing octahedrally coordinated cadmium(II) expanding to chains by two different bridging modes, including Cd‒O‒C‒O‒Cd and Cd‒N‒Cd.

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.

Synthesis and structural, redox and photophysical properties of tris-(2,5-di(2-pyridyl)pyrrolide) lanthanide complexes

2019 ◽  
Vol 48 (25) ◽  
pp. 9365-9375 ◽  
Author(s):  
James N. McPherson ◽  
Laura Abad Galan ◽  
Hasti Iranmanesh ◽  
Massimiliano Massi ◽  
Stephen B. Colbran
Keyword(s):  
Nmr Spectroscopy ◽  
Lanthanide Complexes ◽  
Photophysical Properties ◽  
Electrochemical Studies ◽  
X Ray ◽  
X Ray Crystallography

Nine-coordinate tris(dipyridylpyrrolide)lanthanide(iii) complexes were readily obtained, and were investigated by X-ray crystallography, NMR spectroscopy, and photophysical and electrochemical studies.

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