| Abstrakt: |
1.The composition of the products of decomposition of organic compounds of a number of transition metals at the time of their formation was investigated, and it was found that: a) decomposition of methyl derivatives of Mo and W primarily takes place based on the mechanism of a-disproportionation with formation of carbene and carbyne fragments; b) decomposition of benzyl and neophyl derivatives of neodymium and yttrium in THF quantitatively takes place with formation of stable carbene (carbyne) complexes; c) decomposition of trimethylsilyl(germyl)methyl derivatives of W, Mo, Ta, Re, Nb, Rh, Pd, and Pt is accompanied by formation of complexes containing carbene fragments of two types: (CH3)3SiCH: and CH2: (in the case of W, Mo, Ta, Nb, and Rh compounds, this pathway of decomposition is determining); d) in the reaction of benzylmagnesium chloride with Mo, W, Re, Rh, Pt, and Pd chlorides, significant quantities of toluene, the product of a-disproportionation of benzyl groups, and some quantities of stilbene and tolan, the products of recombination of carbene and carbyne fragments, are formed.2.Based on the data in the literature and the data obtained in the present study concerning the mechanism of decomposition of organic compounds of transition metals, hypotheses were advanced concerning the chemistry of the elemental events in catalytic reactions taking place through organometallic compounds (hydrogenation, dehydrogenation, skeletal isomerization, and deuterium exchange). |
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