Cavity‐controlled coordination of square planar metal complexes and substrate selectivity by NHC‐capped cyclodextrins (ICyDs)

The CO2 reduction capabilities of transition-metal-chelated nitrogen-substituted carbon nanotube models (TM-4N2v-CNT, TM = Fe, Ru, Os, Co, Rh, Ir, Ni, Pt or Cu) are characterized by density functional theory.

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Effects of Metal Coordination Geometry on Stabilization of Human Telomeric Quadruplex DNA by Square-Planar and Square-Pyramidal Metal Complexes

Inorganic Chemistry ◽

10.1021/ic8016547 ◽

2008 ◽

Vol 47 (24) ◽

pp. 11910-11919 ◽

Cited By ~ 91

Author(s):

Anna Arola-Arnal ◽

Jordi Benet-Buchholz ◽

Stephen Neidle ◽

Ramón Vilar

Keyword(s):

Metal Complexes ◽

Metal Coordination ◽

Coordination Geometry ◽

Quadruplex Dna ◽

Square Planar

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Synthesis and Spectroscopic Characterization for Some Metal ion Complexes with 2-Hydroxy-3-((5-Mercapto-1,3,4-Thiadiazol-2-yl)Diazenyl)-1-Naphthaldehyde

Baghdad Science Journal ◽

10.21123/bsj.13.2.105-114 ◽

2016 ◽

Vol 13 (2) ◽

pp. 105-114

Author(s):

Baghdad Science Journal

Keyword(s):

Metal Complexes ◽

Metal Ion ◽

Mass Spectra ◽

Spectroscopic Characterization ◽

Bidentate Ligand ◽

Molar Ratio ◽

Theoretical Treatment ◽

Spectroscopic Techniques ◽

Metal Ion Complexes ◽

Square Planar

New metal ion complexes were synthesized with the general formula; K[PtLCl4], [ReLCl4] and K[ML(Cl)2] where M = Pd(II), Cd(II), Zn(II) and Hg(II), from the Azo ligand (HL) [2-Hydroxy-3-((5-mercapto-1,3,4-thiadiazol-2-yl)diazenyl)-1-naphth aldehyde] (HL) the ligand was synthesized from (2-hydroxy-1-naphthaldehyde) and (5-amino-1,3,4-thiadiazole-2-thiol). The ligand and its metal complexes are characterized by phisco- chemical spectroscopic techniques (FT.IR, UV-Vis and Mass spectra, elemental analysis, molar conductivity, Atomic Absorption, Chloride contain and magnetic susceptibility). The spectral data suggest that the (HL) behaves as a bidentate ligand in all complexes. These studies revealed tetrahedral geometries for all metal complexes, except square planar for Pd(II) complex and except octahedral geometry for Pt(IV) and Re(V) complexes. The study of complexes formation via molar ratio of (M:L) as (1:1). Theoretical treatment of this ligand and its metal complexes in gas phase using Hyper chem.8 was preformed.

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Übergangsmetallkomplexe mit Schwefelliganden, LXXVI Redox- und Additionsreaktionen von Nickelkomplexen mehrzähniger Thioether-Thiolat-Liganden. Röntgenstrukturanalysen von (NMe4)2[Ni(′S2′)2] und [Ni(′S4 – C3′)(PMe3)] / Transition Metal Complexes with Sulfur Ligands, LXXVI Redox and Addition Reactions of Nickel Complexes with Multidentate Thioether-Thiolato Ligands. X-Ray Structure Determinations of (NMe4)2[Ni(′S2′)2] and [Ni(′S4–C3′)(PMe3)]

Zeitschrift für Naturforschung B ◽

10.1515/znb-1991-1203 ◽

1991 ◽

Vol 46 (12) ◽

pp. 1601-1608 ◽

Cited By ~ 23

Author(s):

Dieter Sellmann ◽

Stefan Fünfgelder ◽

Falk Knoch ◽

Matthias Moll

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Structure Analysis ◽

Transition Metal Complexes ◽

Nickel Complexes ◽

Addition Reactions ◽

Coordination Geometry ◽

X Ray ◽

Square Planar ◽

Structure Determinations

In order to elucidate specific properties of nickel sulfur complexes, redox and addition-elimination reactions of [Ni(′OS4')]2, [Ni(′NHS4')]2, [Ni(′S5')], [Ni('S4—C5')], and [Ni('S4—C3')] were investigated ('OS4′ 2' = 2,2'-bis(2-mercaptophenylthio)diethylether(2—), 'NHS4'2- = 2,2'-bis(2-mercaptophenylthio)diethylamine(2—), 'S5'2- = 2,2'-bis(2-mercaptophenylthio)diethylsulfide(2—), 'S4-C5'2- = 1,5-bis(2-mercaptophenylthio)pentane(2—), 'S4—C3'2- = 1,3-bis(2-mercaptophenylthio)propane(2—)).Cyclovoltammetry proves the complexes to be redox inactive between —1.4 and +0.8 V vs. NHE. Above +0.8 V the complexes are irreversibly oxidized, below —1,4 V desalkylation takes place and [Ni(′S,′)2]2- is formed. An X-ray structure analysis was carried out of (NMe4)2[Ni(′S2')2], which shows a planar anion with the Ni center in a nearly perfect square planar coordination. Distances and angles are practically identical to those in the [Ni(′S2')2-] monoanion.The complexes coordinate only phosphines as coligands, but thioether donors simultaneously decoordinate and, dependant of reaction temperature, mono- or trisphosphine complexes are formed. [Ni(′S4—C3')(PMe3)] was characterized by X-ray structure analysis and exhibits a square pyramidal coordination geometry.

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Transition metal complexes of 5-bromosalicylidene-4-amino-3-mercapto-1,2,4-triazine-5-one: Synthesis, characterization, catalytic and antibacterial studies

Journal of the Serbian Chemical Society ◽

10.2298/jsc100212136r ◽

2011 ◽

Vol 76 (1) ◽

pp. 75-83 ◽

Cited By ~ 10

Author(s):

A.S. Ramasubramanian ◽

Ramachandra Bhat ◽

Ramakrishna Dileep ◽

Sandya Rani

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Pathogenic Bacteria ◽

Magnetic Moments ◽

Spectroscopic Techniques ◽

Antibacterial Studies ◽

Metal Precursors ◽

Square Planar ◽

Bactericidal Properties

Transition metal complexes of 5-bromosalicylidene-4-amino-3- mercapto-1,2,4-triazine-5-one with metal precursors, such as Cu(II), Ni(II), Co(II) and Pd(II), were synthesized and characterized by physicochemical and spectroscopic techniques. All the complexes are of the ML type. Based on analytical, spectral data and magnetic moments, the Co(II) and Ni(II) complexes were assigned octahedral geometries, while the Cu (II) and Pd(II) complexes square planar. A study on the catalytic oxidation of benzyl alcohol, cyclohexanol, cinnamyl alcohol, 2-propanol and 2- methyl-1-propanol was performed with N-methylmorpholine-N-oxide (NMO) and molecular oxygen as co-oxidants. All the complexes and their parent organic moiety were screened for their biological activity on several pathogenic bacteria and were found to possess appreciable bactericidal properties.

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Transition metal complexes with thiosemicarbazide-based ligands. Part 60. Reactions of copper(II) bromide with pyridoxal S-methylisothiosemicarbazone (PLITSC). Crystal structure of [Cu(PLITSC−H)H2O]Br•H2O

Journal of the Serbian Chemical Society ◽

10.2298/jsc130622084l ◽

2014 ◽

Vol 79 (3) ◽

pp. 291-302 ◽

Cited By ~ 2

Author(s):

Vukadin Leovac ◽

Ljiljana Vojinovic-Jesic ◽

Sonja Ivkovic ◽

Marko Rodic ◽

Ljiljana Jovanovic ◽

...

Keyword(s):

Crystal Structure ◽

Thermal Analysis ◽

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Elemental Analysis ◽

Structural Characterization ◽

Electronic Spectra ◽

Square Planar

The synthesis and structural characterization of a square-planar copper(II) complex with pyridoxal S-methylisothiosemicarbazone (PLITSC) of the formula [Cu(PLITSC?H)H2O]Br?H2O (1) as the first Cu(II) complex with monoanionic form of this ligand were described. Complex 1 together with two previously synthesized complexes [Cu(PLITSC)Br2] (2) and [Cu(PLITSC)Br(MeOH)]Br (3) were characterized by elemental analysis, IR and electronic spectra and also by the methods of thermal analysis, conductometry and magnetochemistry.

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