منابع مشابه
Potassium silver tin selenide, K(2)Ag(2)Sn(2)Se(6).
The title compound was synthesized by a reactive salt reaction at 773 K over a period of 5 d. It has a one-dimensional chain structure consisting of K(+) cations and one-dimensional [Ag(2)Sn(2)Se(6)](2-) anions. The chain is constructed by edge-sharing bitetrahedral [Sn(2)Se(6)] units connected in a 1:2 ratio via linear Ag(+) ions.
متن کاملAn N-heterocyclic carbene adduct of diatomic tin, :Sn=Sn:.
Reduction of an N-heterocyclic carbene (NHC) adduct of SnCl(2), viz. [(IPr)SnCl(2)] (IPr = :C{N(Dip)C(H)}(2); Dip = 2,6-diisopropylphenyl), with a magnesium(I) dimer, has afforded the first NHC complex of a row 5 element in its diatomic form, [(IPr)Sn=Sn(IPr)]; a computational analysis of the complex indicates that it comprises a singlet state, doubly bonded tin(0) fragment, :Sn=Sn:, datively b...
متن کاملSelenium uptake and Se compounds in Se-treated buckwheat
In fi eld experiments, tartary buckwheat and hybrid buckwheat were foliarly sprayed with an aqueous solution of sodium selenate (20 mg Se L–1). In treated plants, the selenium content was signifi cantly higher than in controls, irrespective of the plant part and taxon of buckwheat. The highest average Se concentrations in hybrid and tartary buckwheat were found in seeds. The main Se species fou...
متن کاملSelenium (Se) and breast cancer risk
Material and methods Eight genotypes of 4 most common SNPs localised in GPX1, GPX4, TXNRD2 and SEP15 were selected. Genotyping was performed in 27 triplets matched BRCA1 carriers (cases and controls were matched 1:2) as well as on pairs matched 1:1 consisting of 220 unselected breast cancer (BRCA1 excluded). Cases and controls were matched for year of birth (+/-3 years), number and location of ...
متن کاملStille couplings catalytic in tin: a "Sn-F" approach.
A new tin recycling method for Stille couplings catalytic in tin is reported. PMHS made hypercoordinate by KF((aq)) allows Me(3)SnH to be efficiently recycled during a Pd(0)-catalyzed hydrostannation/Stille cascade. Relative to previously disclosed protocols, reaction times are shorter and because this process is believed to proceed through a Me(3)SnF intermediate the hazards and problems assoc...
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ژورنال
عنوان ژورنال: Journal of Phase Equilibria
سال: 1998
ISSN: 1054-9714,1863-7345
DOI: 10.1361/105497198770342544