Synthesis and antioxidant activity of modified sterically hindered phenols

Salicylaldehyde derivatives containing sterically hindered phenol fragments were synthesized. The compounds obtained are capable to offer protection against UV radiation.     

A cobalt(ii) acetate complex with 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-1H-indole-2,3-dione 3-thiosemicarbazone: synthesis and structure

A complex of Co^II with 1-(3,5-di-tert-butyl-4-hydroxybenzyl)-1H-indole-2,3-dione 3-thiosemicarbazone was obtained and identified by X-ray diffraction, IR and Raman spectroscopy, and quantum chemical calculations. The characteristic C=S frequencies in the IR spectra of the thiosemicarbazones were refined. The data obtained from different methods were compared, which allows more accurate spectroscopic studies of related structures.     

Magnetic hysteresis in a molecular Ising ferrimagnet: Glauber dynamics approach

We use agent-based modeling to investigate the effect of conservatism and partisanship on the efficiency with which large populations solve the density classification task – a paradigmatic problem for information aggregation and consensus building. We find that conservative agents enhance the populations’ ability to efficiently solve the density classification task despite large levels of noise in the system. In contrast, we find that the presence of even a small fraction of partisans holding the minority position will result in deadlock or a consensus on an incorrect answer. Our results provide a possible explanation for the emergence of conservatism and suggest that even low levels of partisanship can lead to significant social costs. Electronic supplementary material  Supplementary Online Material     

Intermolecular Interactions of 3,5-Di-tert-butyl-4-hydroxybenzyl Acetate in Crystal and in Solutions

The molecular and crystal structure of 3,5-di-tert-butyl-4-hydroxybenzyl acetate was studied by single-crystal X-ray diffraction. The molecules form infinite chains in the crystals via hydrogen bonds between the hydroxy and carbonyl groups. The interchain bonding is provided by CH- interactions. In carbon tetrachloride, the molecules of the title compound form weak associates via hydrogen bonds between the hydroxy and carbonyl groups.     

Glycosides ofPatrinia sibirica. I

Chemistry of Natural Compounds - Three glycosides, named sibirosides A, B, and C, have been detected in the roots ofPatrinia sibirica (L.) Juss. All three are derivatives of hederagenin....     

Triterpene glycosides of Dianthus deltoides II. Structure of dianthoside C

Summary The structure of dianthoside C — a triterpene glycoside fromDianthus deltoides L. — has been established.A. E. Arbuzov Institute of Organic and Physical Chemistry, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 420–425, July–August, 1971.     

Triterpene glycosides of Gypsophila patrinii II. The structure of philoside A

Summary From the roots ofGypsophila patrinii two high-molecular-weight triterpene glycosides have been isolated — philosides A and B. The structure of philoside A has been established; it is a gypsogenin nonaoside.A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan' Branch, Academy of Sciences of the USSR. Correspondence Institute of Soviet Commerce. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 598–603, September–October, 1974.