Preparation and phosphorus-31 NMR characterization of structural isomers of 1,5-diphosphadithiatetrazocines: x-ray structures of 1,5-[(exo-CCl3,endo-Cl)P]2N4S2 and 1,5-Et4P2N4S2

1992 ◽  
Vol 31 (10) ◽  
pp. 1861-1865 ◽  
Author(s):  
Tristram Chivers ◽  
Mark Edwards ◽  
Masood Parvez
Keyword(s):  
Structural Isomers ◽  
X Ray ◽  
Nmr Characterization

scholarly journals Stacking Control by Molecular Symmetry of Sterically Protected Phthalocyanines

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5552
Author(s):  
Ryota Kudo ◽  
Masahiro Sonobe ◽  
Yoshiaki Chino ◽  
Yu Kitazawa ◽  
Mutsumi Kimura
Keyword(s):  
Lamellar Structure ◽  
Synthesis And Characterization ◽  
Molecular Symmetry ◽  
X Ray Diffraction ◽  
Melting Points ◽  
Scanning Calorimetry ◽  
Structural Isomers ◽  
X Ray ◽  
Temperature Controlled

The synthesis and characterization of two phthalocyanine (Pc) structural isomers, 1 and 2, in which four 2,6-di(hexyloxy)phenyl units were attached directly to the 1,8,15,22- or 1,4,15,18-positions of the Pc rings, are described. Both Pcs 1 and 2 exhibited low melting points, i.e., 120 and 130 °C respectively, due to the reduction in intermolecular π-π interaction among the Pc rings caused by the steric hindrance of 2,6-dihexyloxybenzene units. The thermal behaviors were investigated with temperature-controlled polarizing optical microscopy, differential scanning calorimetry, powder X-ray diffraction, and absorption spectral analyses. Pc 1, having C4h molecular symmetry, organized into a lamellar structure containing lateral assemblies of Pc rings. In contrast, the other Pc 2 revealed the formation of metastable crystalline phases, including disordered stacks of Pcs due to rapid cooling from a melted liquid.

A Calix[6]arene Receptor Rigidified by a Self-assembled Triammonium Cap: X-ray and NMR Characterization of the Binding of Polar Neutral Guests

2005 ◽  
Vol 17 (3) ◽  
pp. 243-250 ◽  
Author(s):  
Ulrich Darbost ◽  
Michel Giorgi ◽  
Nicolas Hucher ◽  
Ivan Jabin * ◽  
Olivia Reinaud *
Keyword(s):  
X Ray ◽  
Nmr Characterization ◽  
Self Assembled

Silver(I) Pyrazolates. Synthesis and X-ray and31P-NMR Characterization of Triphenylphosphine Complexes and Their Reactivity toward Heterocumulenes

1997 ◽  
Vol 36 (11) ◽  
pp. 2321-2328 ◽  
Author(s):  
G. Attilio Ardizzoia ◽  
Girolamo La Monica ◽  
Angelo Maspero ◽  
Massimo Moret ◽  
Norberto Masciocchi
Keyword(s):  
X Ray ◽  
Nmr Characterization

scholarly journals Raise the anchor! Synthesis, X-ray and NMR characterization of 1,3,5-triazinanes with an axial tert-butyl group

2020 ◽  
Vol 18 (41) ◽  
pp. 8386-8394 ◽  
Author(s):  
Alexey V. Kletskov ◽  
Anastasya D. Zatykina ◽  
Mariya V. Grudova ◽  
Anna A. Sinelshchikova ◽  
Mikhail S. Grigoriev ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Single Crystal ◽  
Crystal Structure Analysis ◽  
X Ray ◽  
Butyl Group ◽  
Tert Butyl Group ◽  
Nmr Characterization ◽  
Single Crystal Structure Analysis

N-t-Bu-N′,N′′-Disulfonamide-1,3,5-triazinanes were synthesized and studied by X-ray single crystal structure analysis and dynamic low-temperature NMR.

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