AFM of metallic nano-particles and nano-structures in heavily irradiated NaCl

AFM investigations are reported for heavily, electron irradiated NaCl crystals in ultra high vacuum (UHV) in the non-contact mode with an UHV AFM/STM Omicron system. To avoid chemical reactions between the radiolytic Na and oxygen and water, the irradiated samples were cleaved and prepared for the experiments in UHV. At the surface of freshly cleaved samples, we have observed sodium nano-precipitates with shapes, which depend on the irradiation dose and the volume fraction of the radiolytic Na. It appears that the nano-structures consist of (i) isolated nano-particles, (ii) more or less random aggregates of these particles, (iii) fractally shaped networks and (iv) ‘‘fabrics’’ consisting of bundles of Quasi-1D arrays forming polymeric networks of nano-particles. Almost independent of the concentration of the metallic Na in the samples the size of the individual nano-particles is in the range 1–3 nm. Our new AFM results are fully in line with our CESR and previous Raman scattering results.

Reaction of Potassium Salts of N-(Thio)phosphorylthioamides with Chlorinated 1,3,5-Triazines

Potassium salts of N-(thio)phosphorylthioamides can substitute one, two, or three halogen atoms in chlorinated 1,3,5-triazine molecules to give the products of imidothiyl structure. At low temperature, products of incomplete substitution of halogen in the starting 1,3,5-triazines can be obtained

Alkylation of N-Phosphorylated Thioamides

N-Phosphorylated thioamides as well as their alkali metal salts readily react with chloroacetamide, bromoacetal, and diiodomethane to form alkylation products at the sulfur atom of the thiocarbonyl group. The reaction with epichlorohydrin proceeds differently and leads to oxygen substitution for the sulfur in the thiocarbonyl group

N-phosphorylated amides and thioamides

The first systematic review is presented on carboxylic and thiocarboxylic acid amides scontaining a substituent with four-coordinated phosphorus atom at the nitrogen atom. The synthesis, structure and certain chemical properties of this compound class have been examined together with their prototropic and phosphorylotropic tautomerism, their dual reactivity, and the structure and properties of some of their metallic and organic derivatives. Particular attention has been paid to the practical application of these compounds. The bibliography includes 223 references. © 1991 IOP Publishing Ltd

N-acylamidophosphinates: Structure, properties and complexation towards main group metal cations

N-Acylamidophosphinates RC(X)NHP(Y)R′2 (NAAP) and their thioanalogues (X,Y=O, S; R = Alk, Ar, CCl3, Het, NR2 2, NR2R3; R' = Ar, OAlk, OAr, SAlk, NAlk2, NHAr) contain X, Y donor atoms and amide nitrogen, which are capable of taking in complexation with metal cations. An application of NAAP complexes in supramolecular chemistry has been investigated in the last decades. Developed synthetic methods allow us to obtain N-acylamidophosphinate ligands contained multiple chelating groups or a combination of several essentially various coordinating fragments in the molecule: chelating moiety C(X)NHP(Y) and a macrocycle. The latter ligands are capable of connecting ions simultaneously by the chelating sites, and by the "guest-host" mechanism using the macrocycle. The bibliography includes 104 references. © 2006 Bentham Science Publishers Ltd

Structure and molecular lability of N-(thio)phosphoryl(thio)amides: XL. Interpretation of the N-benzoyl(acetyl)amidothiophosphate→ N-thiobenzoyl(acetyl)amidophosphate rearrangement by means of 1H, 13C, and 31P NMR spectroscopy

The N-benzoyl(acetyl)amidothiophosphate→ N-thiobenzoyl(acetyl)amidophosphate in CCl4 and toluene-d 8 solutions was studied by means of 1H, 13C, and 31P NMR spectroscopy. The transformation of one amide form to the other is accompanied by intramolecular migrations of the amide proton and (thio)phosphoryl group and is a complex equilibrium of two dynamic systems

O,O-dialkyldithiophosphoric acids in the reactions with nonactivated α-olefins

Reactions of O,O-dialkyl dithiophosphoric acids with hexadec-1-ene, octadec-1-ene, and also 2-methylpentadec-1-ene and 2-methylheptadec-1-ene as impurities in commercial samples of hexadec-1-ene and octadec-1-ene, and pure 2-methylpent-1-ene were studied in the presence of zinc chloride and ultrasound irradiation. © 2013 Copyright Taylor and Francis Group, LLC

Coordination diversity of N-phosphorylated amides and ureas towards viiib group cations

The behavior of ambidentate organophosphorus ligands is of general interest because the nature of the phosphorus-element bond influences directly on the structure of chelate complexes of these compounds. Reasons allowing the polyfunctional ligands to bind metal cations using different coordination modes, closely address the fundamental questions of chemistry, such as the nature of chemical bonding and the isomerism of coordination compounds, or the influence of the ligand structure on regioselectivity of the coordination bond formation and definition of a role of weak intramolecular interactions in the structure stabilization. In the framework of the presented review the information about ambidentate coordination properties of N-Thiophosphorylated thioamides, thioureas of common formula RC(X)NHP(Y)R'2 towards VIIIB group metal cations Co(II), Ni(II), Pt(II) and Pd(II) were summarized and discussed in comparison with organic and diphosphorus analogues: (i) N-acylamides and ureas of common formula RC(X)NHC(Y)R' (NAAU), and (ii) dichalcogenoimididiphosphinates R2P(X)NHP(Y)R'2 (IDP) (X, Y = O, S, Se).© 2008 by Nova Science Publishers, Inc. All rights reserved

Acid-base properties of α-aminomethylphosphine oxides

Abstract-Ionization constants of a series of aminomethylphosphine oxides and respective amino precursors, as well as their isostructural amino phosphonates in water-2-propanol or water medium were determined. The main regularities of the effect of the phosphoryl group on the protolytic equilibria involving mono- and bisphosphorylated amines and diamines were found. The environment effect on the ionization constants of hydrophilic aminophosphoryl compounds and amines was estimated quantitatively. The relationship between the dissociation constants of aminophosphoryl compounds and related constants of amino precursors in the framework of the principle of linearity of free energies was demonstrated. ©Pleiades Publishing, Ltd., 2012

1,2-Benzo-15-crown-5 containing an N-thiophosphorylthiobenzamide fragment

A crown-containing N-thiophosphorylthioamide has been synthesised by a reaction between diisopropyl thiophosphate chloride and (4-amidothiocarbonyl-1,2-benzo)-15-crown-5, and its chelate complex with nickel(II) has been obtained