L. A. Chekulaeva

Alkali metal salts of acrylamide C3H4NOM (M = Li, Na, and K): Synthesis and vibrational spectra

Alkali metal salts of acrylamide C3H4NOM (M = Li, Na, and K) were synthesized for the first time by metallation of acrylamide with alkali metals, their alkyl derivatives, or hydrides. The structures of the compounds synthesized were studied by Raman and IR spectroscopy. Based on the results obtained, an ionic structure was proposed for the salts. The salts were tested as initiators of the anionic polymerization of acrylamide. The catalytic activity of C3H4NOM in the polymerization of acrylamide is not lower than that of the well known catalyst, KOBu1.

Preparation of complex compounds of alumoxanes with alkyl and hydride derivatives of alkali metals

Conclusions1.Controlled reaction of NaAlR4 and NaAlR3H (R=Alk) with water (2∶1) leads to formation of disodiumhexaalkylalumoxanates Na2(R3A1OAlR3). Free alumoxane Et2A1OAlEt2 has been obtained by the reaction of Na2(Et3A1OAlEt3) with allyl bromide.2.Lithium, sodium, and potassium hydrides are attached to alumoxanes in ether and THF with formation of 1∶1 adducts; in aromatic hydrocarbons only NaH and KH react, forming monohydride complexes M(HR2AlOAlR2). Attachment of lithium and sodium hydrides to alumoxane is not complete and is a reversible process.3.Controlled hydrolysis or ammonolysis with methylamine MA1R2H2 (M is Li or Na) leads to the formationof equilibrial mixtures of lithium and sodium mono- and dihydride alumoxane or alumoxane complexes with detachment of MH.

Synthesis of caprolactamates of group II metals

AbstractCaproiactamates of alkaline-earth metals and magnesium of the general formula

Synthesis of aluminum hydride complex compounds containing the heptahydridodialuminate anion Al2H7

{\text{M[}}{\text{O}}]_2

Metalation of 1-R-2-benzyl-o-carboranes with lithium aluminum hydride

, where M = Mg, Ca, Sr, and Ba, were synthesized from alkoxides, hydrides, and organometallic compounds of these metals and ɛ-caprolactam. The catalytic activities of caprolactamates obtained under conditions of anionic polymerization of ɛ-caprolactam were compared. It was demonstrated that the purest caprolactamates and, hence, the most effective catalysts of anionic polymerization of lactams can be obtained from organometallic and hydride compounds of these metals. The reactivities of alkoxides of the alkaline-earth metals and magnesium increase in metallation reactions of ɛ-caprolactam in the order Mg < Ca < Sr < Ba.

Highly efficient synthesis of trimethylarsine

ConclusionsA method has been proposed for the preparation of symmetrical organomagnesium compounds by the metallation of hydrocarbons by [(N-Bu)2Mg]n · AlEt3 in heptane solution.

Synthesis of the complex aluminum hydrides M+Al2H7− (M+=Li, Na, K) and a study of their transformations

1. The reaction of alumohydrides of tetraalkylammonium cations with ethereal solutions of A1H3 leads to formation of heptahydridodialuminates of tetraalkylammonium cations, isolated as distinct compounds. 2 Complex compounds of NaAlH4 and LiAlH4 with dimethoxyethane form compounds containing the [Al2H7]− anion. 3. Some chemical properties of tetraalkylammonium heptahydridodialuminates have been investigated.

Preparation of tricyclohexyltin chloride from dicyclohexylaluminum chloride and SnCl4

A method for the synthesis of alkoxygallium hydrides (ROGaH2 and (RO)2GaH, where R=Pri, Bui) was proposed. The method is based on the reaction of gallane GaH3 with one or two equivalents of the corresponding alcohol. Thermolysis of these compounds was studied by differential thermogravimetry.