Abstract
The oscillatory modes of oxidative carbonylation reaction of two new substrates—2-methyl-3-butyn-2-ol and 2-propyn-1-ol in homogeneous system PdI2-KI-CO-O2-CH3OH are found. Borders of oscillatory areas are drawn, the basic products of reaction are identified, and probable processes routes are offered.
Highlights
The phenomenon of intermediates concentration oscillations is found already in several tens of homogeneous [1] and heterogeneous [2] chemical systems
We were lucky to find out oscillatory modes of oxidative carbonylation reactions of two new alkynes: 2-methyl-3butyn-2-ol (MB) and 2-propyn-1-ol (P)
In early works we investigated the oscillations in palladium halogenide solutions in reactions of alkynes oxidative carbonylation [3,4,5,6,7,8,9,10,11]
Summary
The phenomenon of intermediates concentration oscillations is found already in several tens of homogeneous [1] and heterogeneous [2] chemical systems. The most interesting thing, in our opinion, is the oscillations occurring in homogeneous catalysis conditions They are evolving out of intermediates complex interactions, which are formed during process. In early works we investigated the oscillations in palladium halogenide solutions in reactions of alkynes oxidative carbonylation [3,4,5,6,7,8,9,10,11] These are examples of reactions in which complex products—carboxylic acids and their derivatives—are synthesized from simple substances-H2O, CH3OH, CO, and so on. In ethanol solutions of nickel carbonyl in the presence of an inorganic acid at 40◦C a stoichiometric process occurs (3), which gives α-substituted esters of acrylic acid [15]: 4CH. The first one passes into itaconic anhydride acid (5)
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