Simple method for the preparation of cyclopentadienyliron tricarbonyl salts

Conclusions A simple method was developed for the preparation of cyclopentadienyl tricarbonyl salts by the reaction of [C₅H₅Fe(CO)₂]₂ with CO and ferric sulfate upon heating in methanol.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2147–2148, September, 1984.     

UV photolysis of protonated ruthenium and osmium decamethylmetallocenes as a new method for synthesis of the metallonium cations

Decamethylmetallocenes Cp^* ₂M (M=Ru, Os) in the presence, of acids (CF₃CO₂H, CF₃SO₃H) give thepprotonation products [Cp^* ₂MH]⁺An⁻. Broad-band UV photolysis of their solutions results in the formation of the salts of onium cations . A preparative procedure for the synthesis of these salts has been developed. Hydrolysis of the salts gives the carbinol Cp^*MC₅Me₄CH₂OH. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 587–591. March, 1999.     

Synthesis of arenerhenium tricarbonyl cations and thermal transformations of rhenium pentacarbonyl bromide

Conclusions The addition of [BrRe(CO)₄]₂, which supposedly is a source of the Re(CO)₅ ⁺ cation, strongly accelerates the reaction between BrRe(CO)₅ (I) and mesitylene in either nonane or octane, which leads to [(Mes)Re(CO)₃]⁺[(CO)₆Re₂Br₃]^–. A new rhenium carbonyl bromide, apparently of the cluster type, was obtained when (I) is refluxed in nonane.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 709–710, March, 1982.     

η3:η1⇌η2-tautomerism in carbonyliron complexes. Thermodynamic characteristics

The thermodynamic characteristics of the equilibrium between the chelate tricarbonylmethyl-π-allyl-σ-R-carbamoyliron complex (R = c-C₆H₁₁) and its π-olefinic isomer in hexane and in hexane/dichloromethane were determined. The observed values fit fairly well with the thermodynamic scale of tautomerism and allow a quantitative conclusion on the influence of solvent, temperature and polarity on the relative stabilities of the tautomeric forms to be reached.     

Reaction of dodecacarbonyltriruthenium with cinnamaldehyde

The reaction of dodecacarbonyltriruthenium with cinnamaldehyde yielded a mixture of the known H₄Ru₄(CO)₁₂, H₂Ru₄(CO)₁₃, and H₂Ru₆(CO)₁₈, and Ru₆C(CO)₁₇ clusters and the 1,1,1,2,2,2,3,3,3-nonacarbonyl-1,2;1,3-(μ₃-dihydrido)-1,3-σ;2-π-[μ₃-η²-(pheny)vinylidene]triangulotriruthenium complex. The structure of the last-mentioned compound was established by X-ray diffraction study. The mechanism of the reaction and a possible pathway of formation of the vinylidene complex are discussed. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1008–1011, May, 1998.     

New arenemanganese dicarbonyl cyanides with ω-functional groups in side chain

Conclusions New arenemanganese dicarbonyl cyanides with -functional substituents in the side chain were prepared, and a principally new possibility for nitrogen of the CN group coordinated with manganese in arenemanganese dicarbonyl cyanides to enter into additional complex formation with an atom of a transition metal was shown.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1611–1614, July, 1981.     

Synthesis of aryl-β-chlorovinyl ketones

Summary A method was developed for the synthesis of aryl--chloxovinyl ketone by condensation of substituted acetophenones with ethyl formale followed by treatment of the resultant hydroxymethylene ketone with thionyl chloride.