Three-Fold Intramolecular Ring-Closing Metatheses Involving Square-Planar Platinum Complexes withcis-Phosphorus Donor Ligands: Syntheses, Structures, and Properties of Parachute-like Complexes

2008 ◽  
Vol 47 (9) ◽  
pp. 3474-3476 ◽  
Author(s):  
Katrin Skopek ◽  
Michał Barbasiewicz ◽  
Frank Hampel ◽  
John A. Gladysz
Keyword(s):  
Platinum Complexes ◽  
Donor Ligands ◽  
Square Planar ◽  
Structures And Properties ◽  
Intramolecular Ring

Observations on the Mechanism of Halogen-Bridge Cleavage by Unidentate Ligands in Square Planar Palladium and Platinum Complexes

1994 ◽  
Vol 47 (2) ◽  
pp. 217 ◽  
Author(s):  
DS Black ◽  
GB Deacon ◽  
GL Edwards
Keyword(s):  
Platinum Complexes ◽  
Donor Ligands ◽  
Cleavage Reaction ◽  
Nitrogen Donor Ligands ◽  
Carbon Bond ◽  
Square Planar ◽  
Nitrogen Donor ◽  
Palladium And Platinum Complexes

Cyclo-palladation and - platination of nitrogen donor ligands lead to insoluble μ- chloro dimers which give μ- bromo and μ- iodo dimers on metathesis with the appropriate lithium halide. Addition of pyridine or 2,6-dimethylpyridine to the cyclopalladated dimers gives monomeric complexes with the halogen trans to the metal-carbon bond, whereas addition of 2,6-dimethylpyridine to the cycloplatinated complexes gives the isomer with the halogen cis to the metal-carbon bond. The results are discussed in terms of the mechanism of the bridge cleavage reaction.

Synthesis and Characterization of Methyl-Palladium and -Platinum Complexes Supported by N,O- and N,S-Donor Ligands

2016 ◽  
Vol 2016 (6) ◽  
pp. 874-879 ◽  
Author(s):  
Daniel Ruiz Plaza ◽  
José C. Alvarado-Monzón ◽  
Gabriel A. Andreu de Riquer ◽  
Gerardo González-García ◽  
Herbert Höpfl ◽  
...  
Keyword(s):  
Platinum Complexes ◽  
Donor Ligands ◽  
Synthesis And Characterization ◽  
Palladium And Platinum Complexes

scholarly journals Nickel(II) cyclohexylethyl-dithiocarbamate P-donor ligands in the coordination sphere

2004 ◽  
Vol 69 (12) ◽  
pp. 1053-1061 ◽  
Author(s):  
Josef Husárek ◽  
Richard Pstorek ◽  
Michal Malon ◽  
Zedenek Sindalar ◽  
Marek Pavlícek
Keyword(s):  
Thermal Analysis ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
1H Nmr Spectroscopy ◽  
Chemical Study ◽  
Donor Ligands ◽  
Conductivity Measurements ◽  
Physico Chemical ◽  
Square Planar ◽  
Vis Spectroscopy

A series of new Ni(II) dithiocarbamate compounds of the composition [NiX(cetdtc)(PR3)](X = Cl, Br, I, NCS; cetdtc = cyclohexylethyldithiocarbamate; R = phenyl, n-butyl) has been synthesized. All the isolated complexes have been characterized by elemental analysis, IR and UV/VIS spectroscopy, 31P{1H}-NMR spectroscopy, thermal analysis magnetochemical and conductivity measurements. On the basis of the results of the physico-chemical study, all complexes are diamagnetic, non-electrolytes with a square-planar NiS2PX chromophore.

Syntheses, structures and properties of five entangled coordination polymers constructed with trigonal N-donor ligands

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5729-5738 ◽  
Author(s):  
Yu Chen ◽  
Juan Yang ◽  
Xi-Chi Wang ◽  
Yu-Ci Xu ◽  
Hui-Ling Xu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Donor Ligands ◽  
Structures And Properties

Five new entangled coordination polymers, which are based on large trigonal N-donor ligands and polycarboxylates, are reported. They display different entangled nets with self-penetrating, polythreading, interdigitation and interpenetration features.

scholarly journals Reaction with Proteins of a Five-Coordinate Platinum(II) Compound

2019 ◽  
Vol 20 (3) ◽  
pp. 520 ◽  
Author(s):  
Giarita Ferraro ◽  
Tiziano Marzo ◽  
Maria Cucciolito ◽  
Francesco Ruffo ◽  
Luigi Messori ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Platinum Complexes ◽  
Rnase A ◽  
Side Chain ◽  
Planar Geometry ◽  
Ionization Mass ◽  
X Ray ◽  
X Ray Crystallography ◽  
Egg White Lysozyme ◽  
Square Planar

Stable five-coordinate Pt(II) complexes have been highlighted as a promising and original platform for the development of new cytotoxic drugs. Their interaction with proteins has been scarcely studied. Here, the reactivity of the five-coordinate Pt(II) compound [Pt(I)(Me) (dmphen)(olefin)] (Me = methyl, dmphen = 2,9-dimethyl-1,10-phenanthroline, olefin = dimethylfumarate) with the model proteins hen egg white lysozyme (HEWL) and bovine pancreatic ribonuclease (RNase A) has been investigated by X-ray crystallography and electrospray ionization mass spectrometry. The X-ray structures of the adducts of RNase A and HEWL with [Pt(I)(Me)(dmphen)(olefin)] are not of very high quality, but overall data indicate that, upon reaction with RNase A, the compound coordinates the side chain of His105 upon releasing the iodide ligand, but retains the pentacoordination. On the contrary, upon reaction with HEWL, the trigonal bi-pyramidal Pt geometry is lost, the iodide and the olefin ligands are released, and the metal center coordinates the side chain of His15 probably adopting a nearly square-planar geometry. This work underlines the importance of the combined use of crystallographic and mass spectrometry techniques to characterize, in detail, the protein–metallodrug recognition process. Our findings also suggest that five-coordinate Pt(II) complexes can act either retaining their uncommon structure or functioning as prodrugs, i.e., releasing square-planar platinum complexes as bioactive species.

scholarly journals Metal Complexes of π-Expanded Ligand (7): Syntheses, Structures and Properties of Pt(II) Complexes Containing the Isomeric 1- and 2-Alkyliminomethyl Pyrene Ligands

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 476 ◽  
Author(s):  
Xuan-Dien Luong ◽  
Xuan-Truong Nguyen
Keyword(s):  
Molecular Structure ◽  
Planar Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pt Complex ◽  
Physico Chemical ◽  
Clear Explanation ◽  
Square Planar ◽  
Structures And Properties ◽  
The Relationship

A [O,N] bidentate π-expanded ligand system, (E)-1-(n-octylimino)methylpyren-2-ol (2), was newly synthesized via a six-step synthesis from pyrene. The ligand 2 reacts with [PtCl2(PhCN)2] in chlorobenzene and the presence of a base at reflux for 2 h under the formation of (2(Pt)) complex with a yield of 70%. The molecular structure of (2(Pt)), studied by common spectroscopic methods and X-ray diffraction, shows a square planar geometry with a trans-configuration of the ligands. The molecular structure, absorption spectra, electrochemical properties, and phosphorescence characteristics of the (2(Pt)) complex are discussed, emphasizing the comparison with those of the previously reported Pt complex (1(Pt)) containing the isomeric ligands of 2, (E)-2-(n-octylimino)methylpyren-1-ol. The DFT calculations of the two Pt complexes are carried out and exhibit a clear explanation of the relationship between their physico-chemical characteristics.

Some tertiary arsine complexes of platinum and palladium

1974 ◽  
Vol 27 (12) ◽  
pp. 2557 ◽  
Author(s):  
Gowda NM Nanje ◽  
GKN Reddy
Keyword(s):  
Carbon Monoxide ◽  
General Formula ◽  
Platinum Complexes ◽  
Carbonyl Complexes ◽  
Square Planar ◽  
Tertiary Arsine ◽  
Square Planar Complexes

A series of square-planar complexes of platinum and palladium of the general formula MX2L2, where M is Pt or Pd, X is Cl, Br or I, and L is EtPh2As or PrPh2As, have been made. The platinum complexes (X = Cl or Br) react with the corresponding halogens to give octahedral complexes of the type PtX4L2. The dichloro complexes of platinum(II) react with carbon monoxide to give carbonyl complexes of the type trans- [PtCl(CO)L2]+. Structures have been assigned to all the compounds.

Thio derivatives of b-diketones and their metal chelates. XXII. Dipole moments of some bivalent and trivalent metal complexes of fluorinated monothio-b-diketones

1976 ◽  
Vol 29 (4) ◽  
pp. 767 ◽  
Author(s):  
M Das ◽  
SE Livingstone ◽  
JH Mayfield ◽  
DS Moore ◽  
N Saha
Keyword(s):  
Copper Complexes ◽  
Dipole Moments ◽  
Platinum Complexes ◽  
Mean Value ◽  
Tetrahedral Configuration ◽  
Square Planar ◽  
Palladium And Platinum Complexes ◽  
Static Polarization ◽  
The Moment ◽  
Derivatives Of

Dipole moments have been determined by static polarization measurements for some iron(111), ruthenium(111), rhodium(111), nickel(11), palladium(11), platinum(11), copper(11) and zinc(11) complexes of fluorinated monothio-β-diketones RC(SH)=CHCOCF3. The moments indicate a facial-octahedral configuration for the iron, ruthenium and rhodium complexes, a cis-square-planar configuration for the nickel, palladium and platinum complexes, and a tetrahedral configuration for the zinc complexes. The copper complexes have moments 0.5-1.0 D lower than the mean value for the corresponding nickel, palladium and platinum complexes; this lowering of the moment is attributed to significant distortion from the square-planar towards the tetrahedral configuration. The dipole moments of the square-planar and octahedral complexes decrease if the R groups are arranged in the order: p-MeC6H4 ≥ 2-thienyl > β-naphthyl > m-MeC6H4 > Ph > Pr? > Bui > Me > m-ClC6H4 > m-BrC6H4 > p-FC6H4 > p-ClC6H4 > p-BrC6H4 > m,p-Cl2C6H3.

scholarly journals Oxo-bridged trinuclear and tetranuclear manganese complexes supported with nitrogen donor ligands: syntheses, structures and properties

2019 ◽  
Vol 48 (22) ◽  
pp. 7918-7927 ◽  
Author(s):  
Deepak Bansal ◽  
Abhishake Mondal ◽  
N. Lakshminarasimhan ◽  
Rajeev Gupta
Keyword(s):  
Magnetic Properties ◽  
Donor Ligands ◽  
Manganese Complexes ◽  
Nitrogen Donor Ligands ◽  
Structures And Properties ◽  
Nitrogen Donor

This work illustrates syntheses, structures, redox and magnetic properties as well as catalase activities of rare μ3-oxo bridged mixed-valent trinuclear MnIIMnIII complexes (1 and 2) and a μ4-oxo bridged tetranuclear MnII4 complex (3) supported with nitrogen donor ligands.

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