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An unusual cyclodimerization reaction of the 1-methyl-1,3-diferrocenylallyl cation into 1,3,5-triferrocenyl-4-(1-ferrocenylethenyl)cyclohexene has been studied. Two isomeric compounds were isolated and their structures were established as 1,r3,c5-triferrocenyl-4-t-(1-ferrocenylethenyl)cyclohexene and 1,r3, t5-triferrocenyl-4-c-(1-ferrocenylethenyl)cyclohexene on the basis of 1H NMR and 13C NMR spectral data.

The geometries of the molecules of the isomeric N -acetyl derivatives of 3-ferrocenyl-5- p -bromophenyl- and 3- p -bromophenyl-5-ferrocenylpyrazolines-2 with a chiral centre in position 5 of pyrazoline have been determined by an X-ray study.

1,1′-Ferrocenylenedicopper is obtained by the action of [CuBr · PPh 3 ] 4 on 1,1′-ferrocenylenedilithium; thermal decomposition and interaction with CuCl 2 has been studied.

The reaction of CH3MgI with the ferrocene-containing α-monosubstituted β-dicarbonyl compounds is studied; a general reaction scheme is proposed. The addition reaction to a carbonyl group, the enolization and the CαCβ-cleavage prove to be non-specific by D-labelling.

Interaction of PhMgBr with α-monosubstituted β-dicarbonyl compounds, β-diketones, β-ketonic esters and β-diesters, is studied. A new reaction route, C α C β -cleavage, the course of which is determined by the p K R + value of the α-substituent and the p K a value of the corresponding proton analog of the β-substituent is found.

Results of an X-ray structural study of 2-silver(dimethylaminomethyl)ferrocene are discussed. Joint thermal decomposition of this compound and cymantrenylsilver is shown to produce 2-dimethylaminomethyl-1-cymantrenylferrocene along with coupling products of symmetrical radicals.

The asymmetric induction in the synthesis of pyrazolines with ferrocenyl and phenylbutadienyliron tricarbonyl substituents is estimated. Diastereomeric selectivity is shown to be sufficiently high both by the induction of a chiral centre by a chirality plane and vice versa. The molecular geometry of diastereomeric 1-acetyl-3-[4-phenylbutadienyliron tricarbonyl]-5-ferrocenylpyrazolines is discussed.

Some properties of 2-copper-1-(dimethylaminomethyl)ferrocene [1] have been studied (thermal decomposition, decomposition by strong (HCl) and the crystal structure of this organocopper compound has been determined.

1-Ferrocenyl-2-arylcyclopropanes have been synthesized by catalytic thermolysis of ferrocenylpyrazolines. An X-ray diffraction study of trans-1-ferrocenyl-2-p-methoxyphenylcyclopropane isolated in an individual form was carried out.