L. A. Petrova

Solid-state mechanochemical synthesis of ferrocene

Abstract Solid-state mechanochemical reactions of iron(II) chloride with cyclopentadienides of alkaline metals or thallium, which lead to the formation of ferrocene, were studied. The dependence of the yield of the product on the parameters of mechanical loading for the reaction with cyclopentadienylthallium was determined.

Oxidation of 1-alkylcycloalkanols with PbIV and MnIII compounds under mechanical activation

A mechanoactivated solid-state oxidative decyclization of 1-alkylcycloalkanols under the action of the Pb(OAc)4−MX or Mn(OAc)3−MX systems (MX is a metal halide) was carried out for the first time. The reaction affords exclusively ω-haloalkanones.

Mechanochemical synthesis of triphenylmethylium and triphenylcyclopropenylium tetrakis(pentafluorophenyl)borates

A possibility of application of mechanochemical method for the synthesis of triphenylmethylium and triphenylcyclopropenylium tetrakis(pentafluorophenyl)borates by the solvent-free reaction of solid starting compounds was studied. Some specific features of these reactions were discovered. Preparative methods for the mechanochemical synthesis of these salts were developed. This method makes the process shorter and excludes the use of solvents in the synthesis.

Self-propagating synthesis of chromium acetylacetonate

After preliminary mechanical activation a mixture of solid chromium(III) chloride and sodium acetylacetonate becomes capable of reacting to form chromium acetylacetonate. The reaction may be carried out in the mode of a self-propagating process.

Mechanochemical synthesis of zirconium and hafnium phenoxyimine complexes L2MCl2 (L = N-(3,5-di-tert-butylsalicylidene)-2,3,5,6-tetrafluoroanilinate anion) and their catalytic properties in ethylene polymerization

A new method for preparation of zirconium and hafnium phenoxyimine complexes L2MCl2 (L is N-(3,5-di-tert-butylsalicylidene)-2,3,5,6-tetrafluoroanilinate anion, M = Zr, Hf) by the solid state interaction of N-(3,5-di-tert-butylsalicylidene)-2,3,5,6-tetrafluoroaniline, the corresponding metal chlorides, and sodium hydride under mechanical activation followed by heating of the activated mixture was developed. The obtained complexes have a high catalytic activity in the reaction of ethylene polymerization.

Oxoalkylation of Pyrazine by 1-Methylcycloalkanols Upon Mechanical Activation

Solid-phase reactions and reactions in the absence of solvent have recently attracted considerable attention [1, 2]. We have already shown that the solid-phase reaction of protonated pyridine and 4-picoline with tertiary cyclic alcohols, which proceeds by the action of Pb(OAc)4, leads to the products of the oxoalkylation of these heterocyclic compounds in high yield [3]. However, the oxoalkylation of pyrazine could not be achieved under analogous conditions.

Solid-state mechanochemical synthesis of tris(4-imino-2-pentanonato)chromium, Cr[CH3C(NH)CHC(O)CH3]3

Tris(4-imino-2-pentanonato)chromium was prepared by solid-state synthesis under conditions of mechanical activation of a mixture of chromium(III) chloride and sodium 4-imino-2-pentanonate and characterized by IR spectroscopy, X-ray diffraction, and electronic absorption spectroscopy.

solid-state reaction of a lead tetraacetate-metal halide system with naphthalene under mechanical activation

A mechanically activated solid-state reaction of halogenation of naphthalene with a Pb(OAc)4—alkaline or alkaline-earth metal halide system was carried out to yield 1-halonaphthalene as the main reaction product and 1,4-dihalonaphthalene. The solid-state halogenation of naphthalene is more selective than a liquid-phase reaction.