scholarly journals Syntheses and Spectroscopic Studies on Macrocyclic Complexes of Dioxomolybdenum(VI) with Furil as Precursor

2012 ◽  
Vol 9 (2) ◽  
pp. 497-503 ◽  
Author(s):  
D. P. Rao ◽  
H. S. Yadav ◽  
A. K. Yadava ◽  
Sanjay Singh ◽  
U. S. Yadav
Keyword(s):  
General Formula ◽  
Oxygen Transfer ◽  
Electrical Conductance ◽  
Spectroscopic Studies ◽  
Octahedral Geometry ◽  
Macrocyclic Complexes ◽  
Transfer Reactions ◽  
Electronic Data ◽  
Elemental Analyses ◽  
Tetraazamacrocyclic Ligands

Due to their biological relevance, molybdenum catalyzed oxygen transfer reactions have great interest. With this view, some dioxomolybdenum(VI) complexes with general formula [MoO2(mac)](acac)2, (where mac = tetraazamacrocyclic ligands derived from condensation of furil with 1,2-ethanediamine or 1,3-propanediamine and their reaction with β-diketones) have been synthesized using dioxometal ion as kinetic template. The prepared complexes have been characterized by electrical conductance, elemental analyses, infrared and electronic data. All the dioxomoly-bdenum(VI) complexes have octahedral geometry with six coordination.

scholarly journals Synthesis and characterization of cis-dioxomolybdenum(VI) complexes having furil as precursor molecule

2012 ◽  
Vol 77 (9) ◽  
pp. 1205-1210
Author(s):  
Devendra Rao ◽  
Hardeo Yadav ◽  
Ashok Yadava ◽  
Sanjay Singh ◽  
Uma Yadav
Keyword(s):  
Oxygen Transfer ◽  
Chelating Agent ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Transfer Reactions ◽  
Synthesis And Characterization ◽  
Precursor Molecule ◽  
Elemental Analyses ◽  
Tetraazamacrocyclic Ligands

Synthesis of some new dioxomolybdenum(VI) complexes having general formula [MoO2(mac)](acac)2, (where mac = tetraazamacrocyclic ligands derived from condensation of furil with 1,2-diaminobenzene or 2,3-diaminopyridine and their reaction with ?-diketones) using dioxometal ion as kinetic template are reported. The prepared complexes have been characterized by molar conductance, elemental analyses, infrared and electronic data. The spectral data indicate that ligands act as tetradentate chelating agent. Due to their biological relevance, molybdenum catalyzed oxygen transfer reactions have great interest. All the dioxomolybdenum(VI) complexes have octahedral geometry with six coordination.

Some Organoperoxo Complexes of Tin(IV)

1997 ◽  
Vol 50 (3) ◽  
pp. 229 ◽  
Author(s):  
M. Tofazzal H. Tarafder ◽  
Wan M. Z. W. Yunus ◽  
Sidik Silong
Keyword(s):  
Elemental Analysis ◽  
Oxygen Transfer ◽  
Oxidative Addition ◽  
Spectroscopic Studies ◽  
Triphenylphosphine Oxide ◽  
Kinetic Stability ◽  
Transfer Reactions ◽  
Conductivity Measurements ◽  
Infrared Spectroscopic

Some novel organoperoxo complexes of tin were prepared by the oxidative addition of dioxygen with Sn 2+. These are the first reported examples of this kind. The complexes isolated have the compositions [Sn(O2)2.2L], [Sn(O2)2L′], [Sn(O2)L′′2], [Sn(O2)C5H3N(COO)2H2O] and [Sn(O2)2L′′′] (L = pyridine, pyridine N-oxide, triphenylphosphine oxide, aniline; L′ = ethylenediamine, 2-aminopyridine, o-phenylenediamine; L′′ = pyridine-2-carboxylato, 2-aminophenolato, quinolin-8-olato, glycinato; L′′′ = diethylenetriamine and triethylenetetramine). The complexes were characterized by elemental analysis, conductivity measurements and infrared spectroscopic studies. None of these complexes showed oxygen transfer reactions. The ν1(O-O) stretching frequencies appear at 805-820 cm-1 , and are significantly insensitive to the choice of the coligands used. Extensive pp-dp bonding in the complexes renders absolute kinetic stability to the complexes.

scholarly journals Txicological Aspects of Newly Designed Macrocyclic Complexes of Iron(II)

2002 ◽  
Vol 8 (6) ◽  
pp. 315-321 ◽  
Author(s):  
Ashu Chaudhary ◽  
R. V. Singh
Keyword(s):  
Binding Sites ◽  
Brine Shrimp ◽  
Condensation Reaction ◽  
Octahedral Geometry ◽  
Macrocyclic Complexes ◽  
Spectral Studies ◽  
X Ray ◽  
Mass Spectral ◽  
Molar Ratios ◽  
Elemental Analyses

Brine shrimp lethality of a new series of 16 to 26-membered macrocycles of iron(II) containing tetraaza groups and prepared by the template condensation reaction of diacarboxylic acids (malonic, succinic, glutaric or adipic) with 2,6-diaminopyridine and diethylenetriamine in 1:2:2 molar ratios have been studied. Structures and bonding of the macrocyclic complexes have been proposed based on elemental analyses, IR, electronic, X-ray and mass spectral studies. An octahedral geometry for these complexes has been proposed as the binding sites are the nitrogen atoms of the macrocycles. The formation of the complexes as [Fe(Ln)Cl2] has been established on the basis of the chemical composition. The complexes have also been screened against several microbes.

scholarly journals Synthesis and Characterization of Some Novel Schiff Base Complexes of Oxovanadium(IV) Cation

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
A. K. Yadava ◽  
H. S. Yadav ◽  
Sanjay Singh ◽  
U. S. Yadav ◽  
D. P. Rao
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Magnetic Moment ◽  
Electrical Conductance ◽  
Schiff Base Complexes ◽  
Synthesis And Characterization ◽  
Electronic Spectral Data ◽  
Elemental Analyses ◽  
Tetraazamacrocyclic Ligands

A series of oxovanadium(IV) complexes of the type [VO(mac)]SO4(where mac = tetraazamacrocyclic ligands derived from condensation of 4,4,4-trifluro-1-(2-furyl)-1,3-butanedione or 4,4,4-trifluro-1-(2-thenyl)-1,3-butanedione withp-phenylenediamine and their reaction withβ-diketones) have been prepared using oxometal ion of vanadium as kinetic template. These complexes have been ascertained by electrical conductance, magnetic moment, elemental analyses, infrared, e.s.r. and electronic spectral data. All the oxovanadium(IV) complexes are five-coordinate ones.

scholarly journals Synthesis, Spectroscopic and Electrochemical Studies of Mononuclear Fe(II) and Ni(II) Complexes Containing a Macrocyclic Ligand Derived from Pyridine-2,6-dicarboxaldehyde and 1,2-Bis(2-aminoethoxy) Ethane

2011 ◽  
Vol 3 (3) ◽  
pp. 599-607 ◽  
Author(s):  
M. M. Alam ◽  
R. Begum ◽  
S. M. M. Rahman ◽  
S. M. S. Islam
Keyword(s):  
Schiff Base ◽  
Macrocyclic Ligand ◽  
Nickel Complexes ◽  
Spectroscopic Studies ◽  
Octahedral Geometry ◽  
Electrochemical Studies ◽  
Metal Source ◽  
Elemental Analyses ◽  
Uv Visible ◽  
Metal Perchlorate

The cyclic (2+2) template condensation of 2,6-pyridinedicarboxaldehyde with 1,2-bis(2-aminoethoxy) ethane using Pb(SCN)2 as the metal source gave dinuclear lead(II) complex, Pb2L1(SCN)4 (1), where L1 is tetra-Schiff-base macrocycle. The transmetallation treatment of 1 with suitable metal perchlorate yield [FeL1](ClO4)2 (2) and [NiL1](ClO4)2 (3). The complexes (2 & 3) have been characterized by elemental analyses, IR, UV-visible, and ESI-MS spectroscopy. Based on spectral data, octahedral geometry may be proposed for these complexes. The electrochemical behavior of iron and nickel complexes is reported.Keywords:  Macrocyclic complexes; Spectroscopic studies; 1,2-Bis(2-aminoethoxy) ethane; Charge transfer.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: 10.3329/jsr.v3i3.7231               J. Sci. Res. 3 (3), 609-617 (2011)

Structural and spectroscopic studies of transition metal nitrite complexes. VIII. Crystal structures and spectra of three pentanuclear species with stoichiometry [Ni5(N-substituted ethane-1,2-diamine)4(OH)2(NO2)8]

1981 ◽  
Vol 34 (10) ◽  
pp. 2139 ◽  
Author(s):  
AJ Finney ◽  
MA Hitchman ◽  
CL Raston ◽  
GL Rowbottom ◽  
AH White
Keyword(s):  
Transition Metal ◽  
Crystal Structures ◽  
General Formula ◽  
Infrared Spectra ◽  
Spectroscopic Studies ◽  
Molecular Structures ◽  
Structural Variations ◽  
Crystal And Molecular Structures

The preparation of a series of novel compounds of general formula [Ni5L4(NO2)8(OH)2] formed by ethane-1,2-diamine or one of five N-substituted ethane-1,2-diamines (L) is described. The crystal and molecular structures of the ethane-1,2-diamine, N,N'-diethylethane-1,2-diamine and N,N-dimethylethane-1,2-diamine complexes are reported. Each compound contains a planar, pentameric arrangement of nickel(II) ions, linked by bridging hydroxide and nitrite ligands. The details of the nitrite bridges differ among the complexes, causing differences in their electronic and infrared spectra. The structural variations are probably caused by the differing steric requirements of the amine substituents.

ChemInform Abstract: Oxygen-Transfer Reactions of Oxaziridines

ChemInform ◽  
2010 ◽  
Vol 22 (6) ◽  
pp. no-no
Author(s):  
F. A. DAVIS ◽  
M. S. HAQUE
Keyword(s):  
Oxygen Transfer ◽  
Transfer Reactions
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