scholarly journals Intramolecular condensation reactions in protonated dipeptides: Carbon monoxide, water, and ammonia losses in competition

2004 ◽  
Vol 15 (7) ◽  
pp. 1025-1038 ◽  
Author(s):  
Francesco Pingitore ◽  
Michael J. Polce ◽  
Ping Wang ◽  
Chrys Wesdemiotis ◽  
Béla Paizs
Keyword(s):  
Carbon Monoxide ◽  
Condensation Reactions ◽  
Intramolecular Condensation

Intramolecular Condensation Reactions of α, ω-BIS(Triethoxysilyl) Alkanes. Formation of Cyclic disilsesquioxanes

1996 ◽  
Vol 435 ◽  
Author(s):  
Douglas A. Loy ◽  
Joseph P. Carpenter ◽  
Sharon A. Myers ◽  
Roger A. Assink ◽  
James H. Small ◽  
...  
Keyword(s):  
Condensation Reactions ◽  
Intramolecular Condensation

Hydrolytische Bildung von Perchlorsiloxanen / Formation of Chlorosiloxanes by Hydrolysis

1999 ◽  
Vol 54 (5) ◽  
pp. 577-582 ◽  
Author(s):  
Heike Quellhorst ◽  
Andreas Wilkening ◽  
Nicola Söger ◽  
Michael Binnewies
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Reactive Intermediates ◽  
Reaction Products ◽  
Condensation Reactions ◽  
Intramolecular Condensation ◽  
Hydrolysis Reactions

During the reaction of Si2OCl6 with H2O in the gas phase the intermediate Si2OCl5OH has been observed by mass-spectrometry. Reactive intermediates like this are responsible for the formation of higher chlorosilanes by slow hydrolysis reactions of chlorosilanes and -siloxanes. Reaction products of inter- and intramolecular condensation reactions have been observed by GC-MS-methods.

Click reactions and intramolecular condensation reactions on azido-adamantyl-functionalized tin sulfide clusters

2019 ◽  
Vol 6 (8) ◽  
pp. 1973-1976 ◽  
Author(s):  
Annikka Engel ◽  
Eike Dornsiepen ◽  
Stefanie Dehnen
Keyword(s):  
Tin Sulfide ◽  
Click Reactions ◽  
Condensation Reactions ◽  
Intramolecular Condensation ◽  
Sulfide Clusters

Azide–alkyl decorated organotin sulfide clusters were synthesized and further reacted to form peptide-decorated derivatives in solution via strain-promoted azide–alkyne cycloaddition as the key step.

Intramolecular Condensation Reactions of S-Methylmethionine Coordinated to Cobalt(III)

1994 ◽  
Vol 47 (3) ◽  
pp. 501 ◽  
Author(s):  
PM Angus ◽  
BT Golding ◽  
SS Jurisson ◽  
AM Sargeson ◽  
AC Willis
Keyword(s):  
Crystallographic Analysis ◽  
Monoclinic Space Group ◽  
Sulfonium Salt ◽  
Space Group ◽  
X Ray ◽  
Condensation Reactions ◽  
Aqueous Base ◽  
Intramolecular Condensation ◽  
R Factors

The sulfonium salt [(en)2CoO2CCH(NH2)(CH2)2S(CH3)2]3+ (en = ethane-1,2-diamine), prepared by methylation of the thioether group of N,O-coordinated methionine , undergoes a set of complex, intramolecular condensations, oxidations, and rearrangements in aqueous base to give a novel pentadentate cobalt(III) complex (c. 20%) of the 1,9-diamino-4-hydroxy-3,7-diazanonane-4-carboxylate ion ( dhnc ). Its structure has been determined by X-ray crystallographic analysis as trans(O,O)-[Co( dhnc )(OH2)](ClO4)2.2H2O. The crystals were monoclinic, space group P 21/c with a 9.053(2), b 29.437(7), c 7.661(1) Ǻ, β 106.63(1)°, and Z 4; 2383 data with I ≥ 3σ(I) were refined to conventional R factors of 0.046 and 0.060. Investigations concerning the mechanism for the formation of this complex are described.

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