scholarly journals 4-vinylpyridine derivatives: Protonation, methylation and silver(I) coordination chemistry

2021 ◽  
pp. 174751982198965
Author(s):  
Guoqi Zhang
Keyword(s):  
Mass Spectrometry ◽  
Schiff Base ◽  
Coordination Chemistry ◽  
Elemental Analysis ◽  
Silver Complex ◽  
Spectroscopic Techniques ◽  
X Ray ◽  
X Ray Crystallography ◽  
Pyridine Moiety ◽  
New Compounds

( E)-4-[2-(Pyridin-4-yl)vinyl]benzaldehyde, containing both a 4-vinylpyridine and an aldehyde functionality, is utilized to develop new, highly conjugated chalcone compounds and a bis-Schiff base azine compound. The chalcone-containing compounds are further explored for their protonation, methylation and silver(I) coordination chemistry using the pyridine moiety. In parallel, a cyano-containing analogue, ( E)-4-[2-(pyridin-4-yl)vinyl]benzonitrile is also synthesized and studied for its silver(I) coordination chemistry. These new compounds are fully characterized by mass spectrometry, elemental analysis and spectroscopic techniques. The methylated product of ( E)-1-(9-anthryl)-3-{4-[2-(pyridin-4-yl)vinyl]phenyl}prop-2-en-1-one and a silver complex of ( E)-4-[2-(pyridin-4-yl)vinyl]benzonitrile are structurally determined by X-ray crystallography.

scholarly journals An N4-Tetradentate Hydrazone Ligand That Binds in a Neutral, Mono- and Bisdeprotonated Form to Iron(II) and Zinc(II) Metal Ions

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 982
Author(s):  
Devaraj Pandiarajan ◽  
Thomas Fox ◽  
Bernhard Spingler
Keyword(s):  
Mass Spectrometry ◽  
Coordination Chemistry ◽  
Transition Metals ◽  
Metal Ions ◽  
Elemental Analysis ◽  
X Ray Diffraction ◽  
Hydrazone Ligand ◽  
X Ray

The coordination chemistry of butane-2,3-dione bis (2′-pyridylhydrazone) towards the divalent first-row transition metals zinc and iron has been explored. Depending upon the conditions, the ligand in the six complexes was found to be either neutral, mono, or doubly deprotonated. The zinc(II) and iron(II) complexes were fully characterized by elemental analysis, mass spectrometry, and X-ray diffraction methods.

Synthesis, characterization, crystal structure, electrochemical, solvatochromic and biological investigation of novel N4 and N3 type Cu(ii) Schiff base complexes

2017 ◽  
Vol 41 (21) ◽  
pp. 12554-12561 ◽  
Author(s):  
Akbar Azary ◽  
Abolfazl Bezaatpour ◽  
Saber Zahri ◽  
Mandana Amiri
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Infrared Spectroscopy ◽  
Elemental Analysis ◽  
Schiff Base Complexes ◽  
Conductivity Measurements ◽  
Biological Investigation ◽  
X Ray ◽  
X Ray Crystallography

In the present study, three novel Cu(ii) Schiff base complexes were synthesized and characterized using infrared spectroscopy, elemental analysis, conductivity measurements and X-ray crystallography.

scholarly journals Synthesis, Characterization, and Catalytic Studies of Mn(III)-Schiff Base-Dicyanamide Complexes: Checking the Rhombicity Effect in Peroxidase Studies

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Manuel R. Bermejo ◽  
Rocío Carballido ◽  
M. Isabel Fernández-García ◽  
Ana M. González-Noya ◽  
Gustavo González-Riopedre ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Schiff Base ◽  
Solid State ◽  
Elemental Analysis ◽  
Self Assembly ◽  
Metal Ion ◽  
Water Soluble ◽  
Intramolecular Interactions ◽  
X Ray ◽  
Peroxidase Mimics

The condensation of 3-methoxy-2-hydroxybenzaldehyde and the diamines 1,2-diphenylendiamine, 1,2-diamine-2-methylpropane and 1,3-propanediamine yielded the dianionic tetradentate Schiff base ligands N,N′-bis(2-hydroxy-4-methoxybenzylidene)-1,2-diphenylendiimine (H2L1), N,N′-bis(2-hydroxy-4-methoxybenzylidene)-1,2-diamino-2-methylpropane (H2L2) and N,N′-bis(2-hydroxy-4-methoxybenzylidene)-1,3-diaminopropane (H2L3) respectively. The organic compounds H2L1 and H2L2 have been characterized by elemental analysis, IR, 1H and 13C NMR spectroscopies and mass spectrometry electrospray (ES). The crystal structure of H2L2 in solid state, solved by X-ray crystallography, is highly conditioned in the solid state by two N-H•••N intramolecular interactions. The synthesis of three new manganese(III) complexes 1–3, incorporating these ligands, H2L1–H2L3, and dicyanamide (DCA), is reported. The complexes 1–3 have been physicochemically characterized by elemental analysis, IR and paramagnetic 1H NMR spectroscopy, ESI mass spectrometry, magnetic moment at room temperature and conductivity measurements. Complex 1 has been crystallographically characterized. The X-ray structure shows the self-assembly of the Mn(III)-Schiff base-DCA complex through µ-aquo bridges between neighbouring axial water molecules and also by π-π stacking interactions, establishing a dimeric structure. The manganese complexes were also tested as peroxidase mimics for the H2O2-mediated reaction with the water-soluble trap ABTS, showing complexes 1-2 relevant peroxidase activity in contrast with 3. The rhombicity around the metal ion can explain this catalytic behaviour.

Synthesis, crystal structure, aggregation-induced emission (AIE) and electroluminescence properties of a novel emitting material based on pyrrolo[3,2-b]pyrrole

2020 ◽  
Vol 8 (40) ◽  
pp. 14208-14218
Author(s):  
Hongbo Wang ◽  
Jinnan Huo ◽  
Hongbo Tong ◽  
Xuehong Wei ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Donor Group ◽  
Aggregation Induced Emission ◽  
X Ray ◽  
X Ray Crystallography

A novel electroluminescent material based on pyrrolo[3,2-b]pyrrole as skeleton and donor group and dimesitylborons as accept groups has been synthesized and characterized by elemental analysis, mass spectrometry, NMR spectroscopy and X-ray crystallography.

Schiff-base porphyrin and expanded porphyrin analogs

2004 ◽  
Vol 08 (01) ◽  
pp. 1-25 ◽  
Author(s):  
Wyeth B. Callaway ◽  
Jacqueline M. Veauthier ◽  
Jonathan L. Sessler
Keyword(s):  
Schiff Base ◽  
Coordination Chemistry ◽  
Nmr Spectra ◽  
X Ray ◽  
X Ray Crystallography ◽  
Potential Applications ◽  
The Rich ◽  
Schiff Base Macrocycles ◽  
Porphyrin Analogs

In recent years, the field of porphyrin chemistry has expanded to include several new analogs of the original four pyrrole, carbon-bridged systems. This review traces the development of one such class of new macrocycles, namely Schiff-base porphyrin analogs. The review's focus is on the synthesis and properties of these new Schiff-base macrocycles that for ease of division have been divided into four classes: systems with two pyrrole rings, systems with three pyrrole or heterocyclic rings, systems with four pyrrole or heterocyclic rings, and systems with five or more pyrrole or heterocyclic rings. In addition to the role of metal ions as templating agents in the synthesis of these complexes, the rich coordination chemistry of several of the macrocycles is also discussed. X-ray crystallography has played an important role in determining the structures of many of these Schiff-base porphyrin analogs and many of the available structures have been incorporated into this review. Aromaticity of the macrocycles is discussed and has been evaluated from available electronic and NMR spectra. Finally, several potential applications of these molecules are discussed, briefly.

scholarly journals Synthesis and Characterization of a Thiocyanate Bridged Dinuclear Cu(II) Complex Containing Macrocyclic Ligand Derived from Pyridine-2, 6-dicarboxaldehyde and 1, 2-bis(2-aminoethoxy) Ethane

2012 ◽  
Vol 36 (1) ◽  
pp. 89-96
Author(s):  
Md Mahbubul Alam ◽  
Faisal Ahmed ◽  
Rockshana Begum ◽  
Mizanur Rahman ◽  
Iqbal Ahmed Siddiquey ◽  
...  
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Elemental Analysis ◽  
Macrocyclic Ligand ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Esi Ms ◽  
X Ray Crystallography ◽  
Academy Of Sciences

The cyclic (2+2) template condensation of pyridine-2,6-dicarboxaldehyde with 1,2-Bis(2- aminoethoxy) ethane using Pb(SCN)2 gave dinuclear lead (II) complex, Pb2L1(SCN)4 where L1 is a tetra-Schiff-base macrocycle. The transmetallation treatment of Pb2L1(SCN)4 with Cu(ClO4)2.6H2O yield the complex, [Cu2L1(SCN)3(ClO4)] which has been characterized by elemental analysis, IR, ESI-MS spectroscopy and X-ray crystallography. On the basis of spectral data, different geometry of Cu2+ has been suggested. DOI: http://dx.doi.org/10.3329/jbas.v36i1.10924 Journal of Bangladesh Academy of Sciences, Vol. 36, No. 1, 89-96, 2012

Synthesis and Structural Characterization of Metal Complexes of 2-Formylpyrrole 4N-Methylthiosemicarbazone (4ML1) and 2-Acetyl- pyrrole 4N-Methylthiosemicarbazone (4ML2). The X-Ray Crystal Structures of [Ni(4ML1-H)2], [Pd(4ML1-H)2] and [Cd(4ML2)2I2]

2001 ◽  
Vol 56 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Ruben Alonso ◽  
Elena Bermejo ◽  
Rosa Carballo ◽  
Alfonso astiñeiras ◽  
Teresa Pérez
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
X Ray ◽  
Group 12 ◽  
New Compounds ◽  
Group 10 Metals ◽  
C Nmr

Abstract Reaction of 4N-methyl-2-[1-(pyrrol-2-yl)methylidene]hydrazinecarbothioamide (4ML1 and 4N-methyl-2-[1-(pyrrol-2-yl)-ethylidene]hydrazine carbothioamide (4ML1) with zinc(II), cadmium(II) and mercury(II) halides afforded complexes with formulas [M(L)X2] [(L; M; X) =(4ML1; Cd; Cl) (4), (4ML1; Hg; Cl, Br, I) (7 - 9), (4ML2; Cd; Cl) (17), (4ML2; Hg; Cl, Br, I) (20 - 22)] or [M(L)2X2] [(L; M; X) = (4ML1; Zn; Cl, Br, I) (1 - 3), (4ML1; Cd; Br, I) (5, 6), (4ML2; Zn; Cl, Br, I) (14 - 16), (4ML2; Cd; Br, I) (18, 19)]. Reaction of 4ML1 with salts of copper(II), nickel(II), palladium(II) and platinum(II) afforded complexes of formula [M(4ML1-H)2] (10 -13). Crystals of 11, 12 and 19 were studied by X-ray diffractometry, and all new compounds were characterized by elemental analysis, mass spectrometry, and IR, electronic and 1H and 13C NMR spectroscopy and, when pertinent and allowed by the solubility of the compound, 113Cd or 199Hg NMR spectroscopy. In the complexes of Group 12 metals, both ligands are neutral and S-monodentate. In the complexes of copper or Group 10 metals, 4ML1 is monodeprotonated and S,N-bidentate.

Water Promoted One-pot Three-Step Synthesis of Novel N-Saccharin Isoxazolines/Isoxazoles Using KI/Oxone Under Ultrasonic Activation

2019 ◽  
Vol 23 (11) ◽  
pp. 1270-1281 ◽  
Author(s):  
Hamza Tachallait ◽  
Mohsine Driowya ◽  
Eleuterio Álvarez ◽  
Rachid Benhida ◽  
Khalid Bougrin
Keyword(s):  
Cycloaddition Reaction ◽  
Hydroxylamine Hydrochloride ◽  
Spectroscopic Techniques ◽  
X Ray Diffraction ◽  
Ultrasonic Activation ◽  
One Pot ◽  
Ultrasonic Probe ◽  
X Ray ◽  
X Ray Crystallography ◽  
New Compounds

A green and efficient regioselective protocol was developed for the preparation of novel isoxazolines and isoxazoles of N-saccharin derivatives via the water-promoted cycloaddition reaction of nitrile oxides with alkenes and alkynes. It is noteworthy that KI/Oxone/water-promoted one-pot three-component reactions of aldehyde, hydroxylamine hydrochloride, and alkene or alkyne were observed to be very satisfactory. The synthesis of all adducts (4a-j/5a-j) has been carried out by this method with high to excellent yields (70-95%) at 25°C within 30 min, using ultrasonic probe. All the new compounds were thoroughly characterized by spectroscopic techniques and also 5b, 5c and 5f were structurally identified by single-crystal X-ray diffraction methods. X-ray crystallography structure analysis clearly supported the regioselectivity of the cycloaddition reaction.

Cu(ii) complexes with tridentate sulfur and selenium ligands: catecholase and hydrolysis activity

2020 ◽  
Vol 44 (36) ◽  
pp. 15698-15707
Author(s):  
Daniele Cocco Durigon ◽  
Marcos Maragno Peterle ◽  
Adailton João Bortoluzzi ◽  
Ronny Rocha Ribeiro ◽  
Antonio Luiz Braga ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Elemental Analysis ◽  
X Ray ◽  
X Ray Crystallography ◽  
Mononuclear Complexes ◽  
Hydrolysis Activity

Two new copper(ii) mononuclear complexes (CSe and CS) were synthesized and characterized by the following techniques: X-ray crystallography, elemental analysis, IR, EPR and UV-vis spectroscopies, conductimetric analysis and mass spectrometry.

N-alkyl-2-(1,2-diferrocenylvinyl)-4,5-dihydrooxazolinium salts, multi-component synthesis and breaking of their heterocyclic systems

2016 ◽  
Vol 88 (12) ◽  
pp. 1129-1142 ◽  
Author(s):  
Jessica J. Sánchez García ◽  
Marcos Flores-Alamo ◽  
Mark E. Martínez Klimov ◽  
Elena I. Klimova
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alkyl Iodides ◽  
New Compounds ◽  
C Nmr

AbstractA new multicomponent method for the synthesis of N-alkyl-2-(Z-1,2-diferrocenylvinyl)-4,5-dihydrooxazolinium salts 3a–f, 5-(N-alkyl-2′,3′-diferrocenyl-acryloylamido)-3-aza-3-alkylpentanols 4a–d, (E)-N-alkyl-N-(2-morpholinoethyl)-2,3-diferrocenylacrylamides 9a,b,e,f and (E)-N-alkyl-N-(2-piperidinoethyl)-2,3-diferrocenylacrylamides 10a,c from reactions of 2,3-diferrocenylcyclopropenone 1 with bis-1,4-N,O-nucleophiles in the presence of triethyloxonium tetrafluoroborate, alkyl iodides, morpholine, piperidine and Et3N is described. The characterization of the new compounds was done by IR, 1H- and 13C-NMR spectroscopy, mass-spectrometry, elemental analysis and X-ray diffraction studies.

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