Determination of the absolute configuration of the asymmetric nitrogen atom in (+)-D-[SC,RN)-N-methyl-N-isopropyl-α-methyl-benzylaminato-2C,N]-(acetylacetonato-O,O-palladium(II) by x-ray crystallographic analysis

Conclusions By x-ray crystallographic analysis of (+)-D-[(S^C,R^N)-N-methyl-N-isopropyl-o-methyl-benzylaminato-2C,N]-(acetylacetonato-O,O)palladium(II) it was established that with the S configuration of the asymmetric carbon center the adjacent nitrogen atom is fixed in the R configuration during coordination with the metal. Attractive interaction was detected between the H atom of one of the Me groups of theN-isopropyl substituent and the palladium atom. It was shown that it has a stabilizing effect on the ortho-palladized metal ring.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1807–1813, August, 1986.     

Composition of the triacylglycerols of the seeds of some representatives of the family labiatae

The fatty acid compositions of five species and the compositions of the triacylglycerols of 22 species of the family labiatae have been studied for the first time. Octadeca-12,13-dienoic acid has been detected in five species. The typical compositions of the triacylglycerols differs from those of known plant oils with a similar set of fatty acids by the absence of triacylglycerols of the S₃ type and the presence of the S₂U type (0.1–1.6%). The main types are SU₂ (5–24%) and U₃ (74–95%). In a comparison of the position-species composition of the oils studied it was found that the oils of the plants of this family are distinguished by a greater diversity of species of triacylglycerols and also by the nature of the distribution of the unsaturated acyl residues between the 1,3- and 2-positions. In the majority of oils studied, the 2- position is enriched with the 18:1 acid, while the 18:2 acid is distributed predominantly in the 1,3- positions, and the nature of the distribution of the 18:3 acid is determined by its proportion in the total.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 618–625, September–October, 1979.     

Synthesis and structural studies of (1R,2R,5R)-chloro{o-[β-(2-hydroxy-2,6,6-trimethylbicyclo[3.1.1]hept-3-ylidenamino)ethyliminomethyl]phenoxy-O,N,N}palladium(II)

The reaction of (1R,2R,5R)-3-[{2-[(2-hydroxybenzylidene)amino]ethyl}imino]-2,6,6-trimethylbicyclo[3.1.1]heptan-2-ol with lithium tetrachloropalladate was studied. A chiral palladium(II) complex was thus obtained and its structure was confirmed by NMR spectroscopy and X-ray diffraction analysis.     

Palladium complexes based on optically active terpene derivatives of ethylenediamine

Novel chiral palladium diamino complexes with the asymmetric donor N atom Pd(En*)X₂ (where En* = N,N′-bis{[(1S,5R)-6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl]methyl}-1,2-ethylenediamine; X = Cl and Br) were obtained and characterized. Nitrogen-containing derivatives of the natural monoterpene a-pinene were studied as accessible optically active ligands.     

Sorption of Cations of the Zn2+-Hg2+-NO3--H2O System by Biomass of Ostreatus Agaricaceae Basidiomycete and KB-4(H+) Cation Exchanger

Sorption of cations of the Zn²⁺-Hg²⁺-NO₃ ^--H₂O system by the biomass of basidiomycete (line 21 Pl. ostreatus f. florida) and by KB-4(H⁺) cation exchanger at pH 1.00 was studied. The results are discussed with regard to the state of cations in the solution before contact with the sorbent, sorbent properties, and sorption behavior of cations.     

Chiral palladium complexes with monoterpenoids oximes

Oximes of cis-caran-4-one, 3α- and 3β-hydroxycaran-4-ones, cis-verbanone, menthone, and 2β-hydroxybornan-3-one have been synthesized. The obtained oximes react with lithium tetrachloropalladate to give new chiral palladium complexes containing mono-or bidentate oxime ligands.     

Kinetics of the initial stage of catalytic radical chain oxidation of cumene with catalyst deactivation

We have developed a method for estimating the rate constant for the reaction of catalyst deactivation in a radical chain process in the presence of catalysts with low stability. Its applicability is demonstrated in the reaction of oxidation of cumene in the presence of alkylammonium halides.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 30, No. 2, pp. 69–74, March–April, 1994.     

Benzoyl peroxide—tetraalkylammonium iodide system as an initiator of the low-temperature oxidation of cumene

The initiating effect of the benzoyl peroxide—tetraalkylammonium iodide system in the low-temperature liquid-phase oxidation of cumene at 313 K is studied. The reaction proceeds by a nonbranching-chain radical mechanism. At the initial stage, the kinetics of the process is described by a first-order equation. The parameters of the kinetic equation are determined at various substrate concentrations and component proportions in the initiating system. Addition to the reaction mixture of benzoic acid, cumene hydroperoxide, and iodine in amounts that can accumulate during the reaction produces only a slight effect on the oxidation rate.Translated from Kinetika i Kataliz, Vol. 45, No. 6, 2004, pp. 821–828.Original Russian Text Copyright © 2004 by Opeida, Zalevskaya, Turovskaya.     

trans-Dichlorobis{(1R,4S)-1,7,7-trimethyl-3-[(S)-α-methylbenzylimino]bicyclo[2.2.1]heptan-2-one-N}Palladium(II): Synthesis and structural examination

A reaction of (1R,4S)-1,7,7-trimethyl-3-[(S)-α-methylbenzylimino]bicyclo[2.2.1]heptan-2-one with lithium tetrachloropalladate gave a chiral palladium(II) complex with monodentate coordination of the organic ligand. The structure of the complex was confirmed by NMR spectra and X-ray diffraction data.