The separation of yttrium and calcium from acid leach liquor obtained from leaching of fluorescent lamp phosphors has been investigated by solvent extraction with D2EHPA and Cyanex 272 in kerosene. The preliminary tests suggested that D2EHPA was more efficient than Cyanex 272 for separation of y...

A hypothesis is put forward that at pressure 30 kbar f-orbitals begin to participate in generation of a chemical bond between a rare-earth ion and oxygen. This phenomenon is presumed to be responsible for spectral changes observed in praseodymium ethylsulfate at its compression.

The polarized Raman spectra of La(C2H5SO4)3·9H2O, La(C2H5SO4)3·9D2O and KC2H5SO4 crystals have been observed from 30 to 4000 cm−1 at room temperature. The observed bands have experimentally been classified into each Raman-active symmetry species. From the far-infrared spectra from 30 to 300cm−...

The relatively large solubility of Li3N in liquid Li at moderate temperatures, log10 (mol fraction N) = 1.168 – 2036T−1 where 473⩽T ⩽708 and T = (273 + θ°C), and the large increase in the electrical resistivity (7.0 × 10−8ωm/mol%N) that the salt confers on the metal, make it possible to stu...

Infrared spectra of the low temperature modification of C2H2 and C2D2 have been obtained. The spectra of the low temperature phase are interpreted as arising from an orthorhombic crystal with a D2h space group having two molecules per unit cell on C2h sites. The molecular axes are shown to be or...

The absorption spectra of acetylene and acetylene-d2 have been photographed at high dispersion in the 1280 to 1520A region. The vibrational structure of two Rydberg transitions at 65814 cm−1 (3R-A) and 74498 cm−1 (3R′-A) previously reported by Price has been analyzed. Both of these transitions ...

The Raman-active fundamental bands of C2H2, C2HD, and C2D2, excited by Hg 4047 and Hg 4358 in a multiple-reflection Raman tube, were photographed with a spectral resolution of ∼0.3 cm−1. Extensive rotational structure was recorded for the ν1, ν2, and ν41 bands of C2H2 and C2D2 and the ν1 an...

Eight P-branch transitions from the ν51-ν41 difference band of C2D2 have been observed in the microwave region. Significant improvements in the spectroscopic constants for the two states involved in the difference band have been obtained by combining infrared and microwave data. The Stark shif...

The solid-solid phase transition of acetylene-d2 at 149 ± 1 K was investigated using a thermal neutron powder diffraction technique. Due to a rapid recrystallization in the vicinity of the transition point the study of the kinetics of the transition was not successful.

The reactions of the CN− and C3N− anions with cyanoacetylene HC3N, of special interest for the chemistry of Titan’s upper atmosphere, have been investigated by means of FTICR mass-spectrometry. Primary ions, CN− and C3N−, have been produced by dissociative electron attachment (DEA) from BrCN an...

Substituted imidazoles (substituents are Me, Et, i-Bu, n-Hexyl, (CH2)2S–Bu-n, Ph, Bn) react smoothly (room temperature, without catalyst and solvent) with cyanoacetylenes (3-phenyl-2-propynenitrile and 4-(1-butoxyethoxy)-4-methyl-2-pentynenitrile) and aromatic or heteroaromatic aldehydes (benza...

The rotational spectra of OC HCCCN, OC DCCCN have been recorded using pulsed-jet Fourier transform microwave spectroscopy. Accurate molecular constants have been obtained and agree with the results from IR spectroscopy. OC HCCCN is hydrogen-bonded in a linear configuration. The 13C, the 15N, and...

Theoretical studies were performed on seven potential interstellar and circumstellar substituted cyanoacetylenes, Y(CC)CN [Y = C2H5, C3H7, C4H9, F, Cl, Br and CN]. Geometry optimizations were carried out using the DFT/B3LYP, the CCSD and CCSD(T) levels of theory. The cc-pVTZ basis set was used f...

Joint-linker type gels and porous polymers have been synthesized by addition reaction of multi-functional thiol and alkyl diacrylate or diisocyanate compounds. The reaction of multi-functional thiol, 1,3,5-tris(3-mercaptobutyloxethyl)-1,3,5-triazine-2,4,6- (1H,3H,5H)-trione (3T) or pentaerythrit...

Total synthesis of chiral difluorinated [6]-gingerol using key intermediates (R)-(+)- and (S)-(−)-ethyl 2,2-difluoro-3-hydroxyoctanoates, obtained via enzymatic resolution with olipase/4S (Rhizopus japonicus) is described.

First representatives of resorcinol bis(cyclophosphites) were synthesized, on the basis of which a series of metallocomplexes, including a 16-membered binuclear metallocycle, was obtained. The fact that, in this system, two m-phenylene cycles are almost parallel with each other makes possible th...

New cyclic phosphite derivatives of calix[4]arenes in 1,2-alternate configuration were obtained by the interaction of calix[4]arenes with ethylene chlorophosphite; the influence of a tert-butyl group at the upper rim of the macrocycle upon anion binding was shown

Transesterification of dimethyl- or bis(2-chloroethyl) phosphites with triethanolamine yields bifunctional monomers. Phosphorus- and phosphorus and chlorine-containing polyurethanes are prepared, employing N,N-diethanolaminoethyl phosphite or N,N-diethanolaminoethylchloroethyl phosphite as modif...

Acid-treatment of the bio-oil from the pyrolysis of mallee leaves in methanol over a solid acid catalyst Amberlyst 70 has been investigated in this study. The reactivities of the carboxylic acids with methanol were quite different over the solid acid catalyst, which was closely related to their ...

Two open-tubular (OT) capillary electrochromatographic (CEC) columns were prepared by chemically bonding ionizable mono-(2-(methacryloyloxy)ethyl) succinate (MES) and phthalate-functionalized (MEP) ligands onto silica hydride-based phases through surface etching, silanization, and hydrosilation ...