Synthesis and Characterization of Chiral Guanidines und Guanidinium Salts Derived from 1-Phenylethylamine

2012 ◽  
Vol 67 ◽  
pp. 0337 ◽  
Author(s):  
Amélie Castiglia ◽  
Hend M. El Sehrawi ◽  
Thomas Orbegozo ◽  
Dietrich Spitzner ◽  
Birgit Claasen ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Guanidinium Salts

Synthesis and Characterization of Chiral Guanidines und Guanidinium Salts Derived from 1-Phenylethylamine

2012 ◽  
Vol 67 (4) ◽  
pp. 337-346 ◽  
Author(s):  
Amélie Castiglia ◽  
Hend M. El Sehrawi ◽  
Thomas Orbegozo ◽  
Dietrich Spitzner ◽  
Birgit Claasen ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Synthesis And Characterization ◽  
Amino Group ◽  
Nmr Data ◽  
Direct Attachment ◽  
Guanidinium Salts

The synthesis of two new chiral guanidines 5 and 12 and derived guanidinium salts 6, 11, 13 -15 with one and three N-(1-phenylethyl) substituents is described. In both cases, the well-precedented, reliable route via chloro-formamidines was taken. Since direct attachment of the N-methyl-N-(1- phenethyl)-amino group failed, the two-step protocol - introduction of the primary 1-phenethylamino group first followed by N-methylation - was employed. Crystal structures and NMR data reveal, that the sterically highly congested “tris” salt - with formal C3 symmetry, albeit unsymmetrical in the crystal - constitutes an intriguing structure with two rotamers present in solution.

Synthesis and Characterization of 4,5-Dicyano-2H-1,2,3-triazole and Its Sodium, Ammonium, and Guanidinium Salts

2009 ◽  
Vol 48 (4) ◽  
pp. 1731-1743 ◽  
Author(s):  
Margaret-Jane Crawford ◽  
Konstantin Karaghiosoff ◽  
Thomas M. Klapötke ◽  
Franz A. Martin
Keyword(s):  
Synthesis And Characterization ◽  
Guanidinium Salts

Synthesis and Characterization of the Three Dicyclopentapyrenes

1996 ◽  
Vol 61 (10) ◽  
pp. 3572-3572
Author(s):  
Lawrence T. Scott ◽  
Atena Necula
Keyword(s):  
Synthesis And Characterization

Synthesis and characterization of TiN / Ti / AISI 410 coatings

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
S Chirino ◽  
Jaime Diaz ◽  
N Monteblanco ◽  
E Valderrama
Keyword(s):  
Synthesis And Characterization ◽  
Photoemission Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Columnar Grains ◽  
Tin Thin Films ◽  
Steel Aisi ◽  
Interacting Surfaces ◽  
Stainless Steel Aisi

The synthesis and characterization of Ti and TiN thin films of different thicknesses was carried out on a martensitic stainless steel AISI 410 substrate used for tool manufacturing. The mechanical parameters between the interacting surfaces such as thickness, adhesion and hardness were measured. By means of the scanning electron microscope (SEM) the superficial morphology of the Ti/TiN interface was observed, finding that the growth was of columnar grains and by means of EDAX the existence of titanium was verified.  Using X-ray diffraction (XRD) it was possible to observe the presence of residual stresses (~ -3.1 GPa) due to the different crystalline phases in the coating. Under X-ray photoemission spectroscopy (XPS) it was possible to observe the molecular chemical composition of the coating surface, being Ti-N, Ti-N-O and Ti-O the predominant ones.

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