Squaraines: Crystal Structures and Spectroscopic Analysis of Hydrated and Anhydrous Forms of Squaric Acid-Isoniazid Species

2014 ◽  
Vol 118 (49) ◽  
pp. 11521-11528 ◽  
Author(s):  
Felipe D. dos Reis ◽  
Isabela C. Gatti ◽  
Humberto C. Garcia ◽  
Vanessa E. de Oliveira ◽  
Luiz F. C. de Oliveira
Keyword(s):  
Crystal Structures ◽  
Spectroscopic Analysis ◽  
Squaric Acid

Synthesis, crystal structures, spectroscopic analysis and DFT calculations of 2-ethoxy-1-naphtaldehyde and (E)-N-((2-ethoxynaphthalen-1-yl)methylene)-3-methylaniline

2016 ◽  
Vol 1118 ◽  
pp. 194-202 ◽  
Author(s):  
M. Hakkı Yıldırım ◽  
Arzu Özek Yıldırım ◽  
Mustafa Macit ◽  
Ayşen Alaman Ağar ◽  
Hümeyra Paşaoğlu ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Crystal Structures ◽  
Spectroscopic Analysis

scholarly journals The bis(Biphenyl)phosphorus Fragment in Trivalent and Tetravalent P-Environments

Inorganics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 82
Author(s):  
Jonas Hoffmann ◽  
Daniel Duvinage ◽  
Enno Lork ◽  
Anne Staubitz
Keyword(s):  
Crystal Structures ◽  
Spectroscopic Analysis ◽  
Heteronuclear Nmr ◽  
Ortho Position ◽  
Group 14 ◽  
Reaction Conditions ◽  
Synthetic Routes ◽  
Sterically Hindered

Diaryl substituted phosphorus (III) compounds are commonly used motifs in synthesis. Although the basic synthetic routes to these molecules starting from PCl3 are well reported, sterically hindered aryl substituents can be difficult to introduce, especially if the P atom is in ortho position to another group. This work explores the chemistry of the bis(biphenyl)phosphorus(III) fragment. As third substituents, H, M, Cl, NR2, two group 14 element substituents and also Li were introduced in high-yielding processes offering a wide chemical variety of the bis(biphenyl) phosphine motif. In addition, also a tetravalent phosphine borane adduct was isolated. All structures were thoroughly investigated by heteronuclear NMR spectroscopic analysis. Furthermore, the reaction conditions are discussed in connection with the structures and four crystal structures of the aminophosphine, phosphine, phosphine borane and phosphide are provided. The latter crystallized as a dimer with a unique planar P2Li2 ring, which is stabilized by the non-covalent C⋯Li interaction arising from the biphenyl motif and represents a rare example of a donor-free planar P2Li2 ring.

Crystal structures and spectroscopic properties of ester amide and diamide of squaric acid with prolinamide

2009 ◽  
Vol 72 (3) ◽  
pp. 502-509 ◽  
Author(s):  
Tsonko Kolev ◽  
Rüdiger W. Seidel ◽  
Heike Mayer-Figge ◽  
Michael Spiteller ◽  
William S. Sheldrick ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Spectroscopic Properties ◽  
Squaric Acid

scholarly journals Polymorphism in secondary squaramides: on the importance of π-interactions involving the four membered ring

CrystEngComm ◽  
2018 ◽  
Vol 20 (2) ◽  
pp. 237-244 ◽  
Author(s):  
Rafel Prohens ◽  
Anna Portell ◽  
Oriol Vallcorba ◽  
Mercè Font-Bardia ◽  
Antonio Bauzá ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Membered Ring ◽  
Supramolecular Assemblies ◽  
Dft Study ◽  
Squaric Acid ◽  
Π Interactions

We report the crystal structures of four new squaric acid derivatives, i.e. three polymorphs of 3,4-bis((2-(dimethylamino)ethyl)amino)cyclobut-3-ene-1,2-dione (1a–c) and a cocrystal with resorcinol. A DFT study has been also carried out to investigate the supramolecular assemblies.

scholarly journals Single-crystal structures and spectroscopic analysis in metal complex dynamics

2016 ◽  
Vol 72 (a1) ◽  
pp. s388-s388
Author(s):  
Andreas Roodt ◽  
Hendrik G. Visser ◽  
Alice Brink ◽  
Marietjie Schutte-Smith ◽  
Pennie Mokolokolo ◽  
...  
Keyword(s):  
Metal Complex ◽  
Single Crystal ◽  
Crystal Structures ◽  
Spectroscopic Analysis ◽  
Complex Dynamics ◽  
Single Crystal Structures
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