A possible construction of a complex chemical reaction network

1977 ◽  
Vol 45 (3) ◽  
pp. 225-233 ◽  
Author(s):  
István Nemes ◽  
Tamás Vidóczy ◽  
László Botár ◽  
Dezsö Gál
Keyword(s):  
Chemical Reaction ◽  
Reaction Network ◽  
Chemical Reaction Network ◽  
Complex Chemical ◽  
Complex Chemical Reaction

A possible construction of a complex chemical reaction network

1977 ◽  
Vol 45 (3) ◽  
pp. 215-223 ◽  
Author(s):  
István Nemes ◽  
Tamás Vidóczy ◽  
László Botár ◽  
Dezsö Gál
Keyword(s):  
Chemical Reaction ◽  
Reaction Network ◽  
Chemical Reaction Network ◽  
Complex Chemical ◽  
Complex Chemical Reaction

scholarly journals Early warning signals in chemical reaction networks

2020 ◽  
Vol 56 (26) ◽  
pp. 3725-3728
Author(s):  
Oliver R. Maguire ◽  
Albert S. Y. Wong ◽  
Jan Harm Westerdiep ◽  
Wilhelm T. S. Huck
Keyword(s):  
Complex Systems ◽  
Chemical Reaction ◽  
Early Warning ◽  
Reaction Network ◽  
Chemical Reaction Networks ◽  
Chemical Reaction Network ◽  
Reaction Networks ◽  
Warning Signals ◽  
Early Warning Signals ◽  
Complex Chemical

Many natural and man-made complex systems display early warning signals when close to an abrupt shift in behaviour. Here we show that such early warning signals appear in a complex chemical reaction network.

Synthesis and Breakdown of the Universal Precursors to Biological Metabolism Promoted by Ferrous Iron

2018 ◽  
Author(s):  
Kamila B. Muchowska ◽  
Sreejith Jayasree VARMA ◽  
Joseph Moran
Keyword(s):  
Amino Acids ◽  
Chemical Reaction ◽  
Metabolic Pathways ◽  
Ferrous Iron ◽  
Reaction Network ◽  
Tca Cycle ◽  
Chemical Reaction Network ◽  
Metabolic Precursors ◽  
Tca Cycle Intermediates

How core biological metabolism initiated and why it uses the intermediates, reactions and pathways that it does remains unclear. Life builds its molecules from CO<sub>2 </sub>and breaks them down to CO<sub>2 </sub>again through the intermediacy of just five metabolites that act as the hubs of biochemistry. Here, we describe a purely chemical reaction network promoted by Fe<sup>2+ </sup>in which aqueous pyruvate and glyoxylate, two products of abiotic CO<sub>2 </sub>reduction, build up nine of the eleven TCA cycle intermediates, including all five universal metabolic precursors. The intermediates simultaneously break down to CO<sub>2 </sub>in a life-like regime resembling biological anabolism and catabolism. Introduction of hydroxylamine and Fe<sup>0 </sup>produces four biological amino acids. The network significantly overlaps the TCA/rTCA and glyoxylate cycles and may represent a prebiotic precursor to these core metabolic pathways.

Diin-Reaktion, 431 Synthese und komplexchemische Umsetzung von 1.2.4.5-Tetra(phenylpropinoyl)-benzol / Diin Reaction, 431 Synthesis and Complex-chemical Reaction of 1,2,4,5-Tetra(phenylpropynoyl)-benzene

1977 ◽  
Vol 32 (1) ◽  
pp. 68-71 ◽  
Author(s):  
Jürgen Hambrecht ◽  
Eugen Müller
Keyword(s):  
Chemical Reaction ◽  
Complex Chemical ◽  
Subsequent Oxidation ◽  
Complex Chemical Reaction ◽  
Grignard Addition

The Grignard-addition of phenylethynylmagnesium bromide to 1,2,4,5-tetraformylbenzene (1) and the subsequent oxidation of the primary formed alcohol (2) afford the l,2,4,5-tetra(phenylpropynoyl)benzene (8). The reaction of 8 with tris(triphenylphosphin)-rhodium-(I)chloride leads to the Rh-complex (4), which further reacts with acetylenederivates and chalcogens to form the quinoid compounds 5a-c and 6, 7.

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