Electron impact and molecular dissociation. Part XIX. Mass spectral studies of some binuclear metal complexes

1968 ◽  
Vol 1 (1) ◽  
pp. 71-80 ◽  
Author(s):  
F. J. Preston ◽  
R. I. Reed
Keyword(s):  
Metal Complexes ◽  
Electron Impact ◽  
Spectral Studies ◽  
Molecular Dissociation ◽  
Mass Spectral ◽  
Binuclear Metal

Mass Spectral Studies of Binuclear Metal Complexes: Copper(I) Carboxylates

1973 ◽  
Vol 51 (17) ◽  
pp. 2999-3005 ◽  
Author(s):  
Denis C. K. Lin ◽  
John B. Westmore
Keyword(s):  
Fragmentation Pathway ◽  
Spectral Studies ◽  
Aryl Group ◽  
Decomposition Products ◽  
Fragmentation Pathways ◽  
Molecular Ion ◽  
Mass Spectral ◽  
Fragment Ions ◽  
Binuclear Metal ◽  
And Migration

The thermal decomposition of twenty-five cupric carboxylates was studied by mass spectrometry. In eleven cases volatile cuprous carboxylates (many of which have not been previously reported) were detected amongst the decomposition products. The cuprous carboxylates from acetic, propionic, n-butyric, isobutyric, difluoroacetic, trifluoroacetic, benzoic, p-fluorobenzoic, p-chlorobenzoic, o-chlorobenzoic, and pentafluorobenzoic acids were all found to be dimeric in the vapor phase. Two basically different fragmentation pathways can be proposed depending upon whether the copper salt is formed from an alkyl- or aryl-carboxylic acid. For the former, the spectra are dominated by even-electron fragment ions formed by initial loss of RCO2•from the molecular ion. For the latter, a parallel fragmentation pathway initiated by loss of CO2 from the molecular ion and migration of the aryl group to the metal is also present.

scholarly journals SYNTHESIS, BIOLOGICAL STUDY, DNA INTERACTION OF MANNICH BASE METAL COMPLEXES DERIVED FROM BENZAMIDE

2021 ◽  
pp. 60-64
Author(s):  
SIVAKAMI SUDHASANKAR
Keyword(s):  
Metal Complexes ◽  
Mannich Base ◽  
Dna Interaction ◽  
Mannich Bases ◽  
Molar Conductance ◽  
Biological Study ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Calf Thymus ◽  
Uv Visible

Objective: Coordination compounds occur widely in nature and they comprise a large share of current inorganic research. The Mannich reaction is a classic method for the preparation of Mannich bases, namely, β amino compounds, which are heterocyclic. Methods: A novel Mannich base of N-((3,4-dimethoxyphenyl)(2,5-dioxopyrrolidin-1-yl) methyl)benzamide and its coordination complexes with transition metals Mn and Co have been synthesized and characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, UV-Visible, IR, NMR, and Mass spectral studies. Results: Based on the magnetic moment and UV-Visible spectral data, octahedral geometries were assigned for the metal complexes. The metal complexes were screened for antifungal activity. Conclusion: the metal complexes have shown good activity than the ligand. The binding of selected metal complexes with calf thymus DNA was investigated. It is found that the cobalt (II) metal complex of the ligand showed efficient DNA binding ability.

scholarly journals Synthesis, Characterization and Biological Evaluation of Schiff Base Transition Metal Complexes Derived from 4-Nitrobenzene-1,2-diamine and 5-Chloroisatin

2020 ◽  
Vol 32 (9) ◽  
pp. 2324-2328
Author(s):  
NETRA PAL SINGH ◽  
KAUSHAL KUMAR ◽  
GAJENDRA KUMAR ◽  
ANUROOP KUMAR
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Moments ◽  
Biological Evaluation ◽  
Molar Conductance ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Bacteria And Fungi

A series of transition metal complexes of the type [MLX2], where M = Mn(II), Fe(II), Co(II), Ni(II), X = Cl–/CH3COO– and L = Schiff base derived from 4-nitrobenzene-1,2-diamine and 5-chloroisatin have been synthesized and characterized by elemental analysis, molar conductance, IR, UV-visible, magnetic moments measurement, 1H & 13C NMR and mass spectral studies. On the basis of physico-chemical studies and spectral evaluation, an octahedral geometry have been proposed for all metal(II) complexes. The antimicrobial activity of ligand and its metal complexes have been additionally screened against bacteria and fungi. Metal(II) complexes show good activity as compared to ligand towards studied microorganisms and also metal complexes checked for their catalytic properties for benzoylation of phenol.

Metal salt catalyzed carbenoids. XVIII. The electron impact mass spectral behavior of diazocarbonyl compounds. I.

1984 ◽  
Vol 62 (3) ◽  
pp. 554-560 ◽  
Author(s):  
D. S. Wulfman ◽  
James Roberts ◽  
Dennis K. Henderson ◽  
J. C. Romine ◽  
R. S. McDaniel Jr. ◽  
...  
Keyword(s):  
Electron Impact ◽  
Metal Salt ◽  
Spectral Studies ◽  
Spectral Behavior ◽  
Mass Spectral ◽  
Ethyl Diazoacetate ◽  
Methyl Diazoacetate ◽  
Electron Impact Mass ◽  
Impact Mass

Electron impact (EI) mass spectral studies of methyl diazoacetate, ethyl diazoacetate (1), methyl diazoacetoacetate (2), and dimethyl diazomalonate (3) indicate that loss of N2 is exceedingly difficult from the parent ion and was observed only with 3. Diazoacetylacetone exhibits an appreciable (M − 28)+. ExactMass and metastable transitions indicate fragmentation occurs in part via 1,2,3-oxadiazolium ion-radicals (6) or α-lactones (7) to furnish N2O and hyponitrite esters. (M − 28)+ from 1 results from loss of ethylene.

Electron impact mass spectral studies of hydrazine monoamine oxidase inhibitor drugs

1975 ◽  
Vol 2 (2) ◽  
pp. 82-89 ◽  
Author(s):  
Roland M. De Sagher ◽  
André P. De Leenheer ◽  
Albert E. Claeys ◽  
Annie A. Cruyl
Keyword(s):  
Monoamine Oxidase ◽  
Electron Impact ◽  
Monoamine Oxidase Inhibitor ◽  
Oxidase Inhibitor ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Electron Impact Mass ◽  
Impact Mass
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