In vitro evaluation of the effect of five insecticidal phosphoric and 11 thiophosphoric acid esters on different, non-specific human leukocytes esterases indicated that most of the organic phosphor compounds studied inhibited the activity of neutral α-naphthylacetate esterase, α-naphthylbutyry...

Various S-substituted thiosuccinimides 1a-d and thiophthalimides 2a-d were found to react with trialkylphosphites according to a Michaelis-Arbuzov type mechanism. This provides an efficient way to prepare thiophosphoric acid esters, particularly thiophospholipids, with a C-S-P bond.

Ukrain is a semisynthetic compound consisting of alkaloids from Chelidonium majus L. conjugated to thiophosphoric acid, with immunomodulatory and therapeutic properties in cancer patients. The present in vitro studies demonstrate that Ukrain is an effective biological response modifier in that i...

The urease inhibitor, N-(n-butyl) thiophosphoric triamide (NBPT), has been proposed to reduce synthetic fertilizer-N losses, including nitrous oxide (N2O) emissions from agricultural soils. However, the response of N2O emission to NBPT amendment is inconsistent across soils and associated microb...

The permeation of Pd(II) through supported liquid membranes (SLMs) impregnated with di-(2-ethylhexyl) thiophosphoric acid (DEHTPA) in kerosene has been investigated. A model is reported describing the transport mechanism which consists of: diffusion process through the feed aqueous diffusion lay...

1.1. Eight amides (amidoesters and triamides) of thiophosphoric acids were synthesized, four of which have not been described in the literature.2.2. The replacement of the alkoxy group by an amido-group in thiophosphoric acid esters increases the antioxidizing activity of compounds; all the amid...

This study reports the modelling of zinc extraction from sulphate media with bis(2-ethylhexyl)thiophosphoric acid by emulsion liquid membranes. The model developed by Lorbach et al. [Ger. Chem. Eng. 9 (5) (1986) 321] was extended to the present situation. The model accounts for the chemical reac...

Using an N-oleoyl ethanolamide scaffold, a series of phosphate polar head group analogues of LPA comprised of various α-substituted phosphonates and thiophosphates was prepared. In a broken cell GTP[γ35S] binding assay, agonist activity was evaluated at the three LPA receptors of the endotheli...

The chemistry of the hydride complexes of the rare-earth metals has been dominated by complexes with metallocene and half-sandwich ligand frameworks. In contrast to hydride complexes supported by cyclopentadienyl ligands, only relatively few examples of non-metallocene hydride complexes have bee...

Dimeric di-η5-cyclopentadienyllutetium hydride was prepared by the reaction of dicyclopentadienyl- lutetium chloride with sodium hydride in THF at ambient temperature. The solution was concentrated and cooled to −30 °C to afford the crystalline complex [(η5-C5H5)2LuH·OC4H8]2. The crystals of...

Attempts to synthesize the sterically crowded complexes (C5Me5)3Ln of the smallest lanthanide metals, Ln = Tm, and Lu, from (C5Me5)2Ln(μ-Ph)2BPh2 and KC5Me5 via mechanochemical methods has revealed C–H bond activation chemistry: the tuckover hydride complexes, (C5Me5)2Ln(μ-H)(μ-η1:η5-CH2C5...

Heteromultimetallic hydride complexes consisting of both rare-earth and d-transition metals are expected to exhibit unique reactivity because they have potential to show the synergistic effect of the substantially different types of metal centers. Here we report the reactions of rare-earth/ruthe...

The reductive chemistry of [Cp'2Ln(μ–H)(THF)x]y [Ln = Y, Dy, Tb; Cp' = (C5H4SiMe3)1−; x = 2, 0 and y = 2, 3] was examined to determine if these hydrides would be viable precursors for 4fn5d1 Ln2+ ions that could form 5d1-5d1 metal–metal bonded complexes. The hydrides were prepared b...

The low temperature heat capacity measurements for the LuH2.84 trihydride sample are reported. The analysis of Cp(T) was performed on the basis of the Debye and Einstein approximations. The characteristic temperatures: ΘD = 227 K for Lu atoms, ΘEI=97K, ΘEII=886K and ΘEIII=1380K for hydrogen ...

A survey of the literature on cationic rare-earth metal hydride complexes is presented. This overview follows systematics based on the nature of supporting ligands and provides comparisons between neutral and cationic hydrides with respect to their structure and reactivity.

The meta-azacyclophane (Me3TAMC)H (=2,5,8-trimethyl-2,5,8-triaza-meta-cyclophane) reacted with the rare earth metal tris(trimethylsilylmethyl) complex [Ln(CH2SiMe3)3(THF)2] (Ln = Sc, Y, Lu) in THF or benzene to give a Cs-symmetric bis(trimethylsilylmethyl) complex [Ln(Me3TAMC)(CH2SiMe3)2]. The t...

This paper concerns new possibilities opened by the addition of (mono)organocopper compounds and iodotrimethylsilane (TMSI) to α,β-unsaturated ketones and esters giving the silyl enol ethers and ketene acetals, respectively. We demonstrate the homogeneous addition of methylcopper-tributyl-phos...

The microwave spectra of methyl iodosilane and its six isotopic species were measured. The rotational, centrifugal distortion constants and all the nonzero components of the nuclear quadrupole coupling constant tensor χ in the inertial principal axes system were simultaneously determined. From ...

Bromination and iodination of hydrosilanes and germanes were studied. Treatment of hydrosilanes with an excess of ethyl, propyl, or allyl bromide in the presence of a catalytic amount of PdCl2 or NiCl2 gave bromosilanes in good to high yield by hydrogen–halogen exchange. By using methyl, propyl...

Ethyl iodosilane (CH3CH2–SiH2I) was synthesized for the first time. Infrared spectra were recorded in the vapour, amorphous and crystalline solid phases in MIR and FIR regions. Additional MIR spectra of the compound isolated in argon and nitrogen matrices were obtained at 5 K. Raman spectra of ...