Application of Roof-Shape Amines as Chiral Solvating Agents for Discrimination of Optically Active Acids by NMR Spectroscopy: Study of Match–Mismatch Effect and Crystal Structure of the Diastereomeric Salts

2016 ◽  
Vol 81 (17) ◽  
pp. 7384-7392 ◽  
Author(s):  
Riddhi Gupta ◽  
Rajesh G. Gonnade ◽  
Ashutosh V. Bedekar
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Optically Active ◽  
Spectroscopy Study ◽  
Roof Shape ◽  
Diastereomeric Salts ◽  
Mismatch Effect

Effect of Substituent of Roof Shape Amines on the Molecular Recognition of Optically Active Acids by NMR Spectroscopy

2020 ◽  
Vol 5 (42) ◽  
pp. 13183-13190
Author(s):  
Riddhi Gupta ◽  
Rajesh G. Gonnade ◽  
Ashutosh V. Bedekar
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Recognition ◽  
Optically Active ◽  
Roof Shape

First X-Ray Crystal Structure and Internal Reference Diffusion-Ordered NMR Spectroscopy Study of the Prototypical Posner Reagent, MeCu(SPh)Li(THF)3

2013 ◽  
Vol 19 (31) ◽  
pp. 10138-10141 ◽  
Author(s):  
Steven H. Bertz ◽  
Richard A. Hardin ◽  
Thomas J. Heavey ◽  
Daniel S. Jones ◽  
T. Blake Monroe ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Spectroscopy Study ◽  
Internal Reference ◽  
X Ray

scholarly journals Exploring the Structural Chemistry of Pyrophosphoramides: N,N′,N″,N‴-Tetraisopropylpyrophosphoramide

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 149-163
Author(s):  
Duncan Micallef ◽  
Liana Vella-Zarb ◽  
Ulrich Baisch
Keyword(s):  
Crystal Structure ◽  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Hydrogen Bonding ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray Diffraction ◽  
X Ray

N,N′,N″,N‴-Tetraisopropylpyrophosphoramide 1 is a pyrophosphoramide with documented butyrylcholinesterase inhibition, a property shared with the more widely studied octamethylphosphoramide (Schradan). Unlike Schradan, 1 is a solid at room temperature making it one of a few known pyrophosphoramide solids. The crystal structure of 1 was determined by single-crystal X-ray diffraction and compared with that of other previously described solid pyrophosphoramides. The pyrophosphoramide discussed in this study was synthesised by reacting iso-propyl amine with pyrophosphoryl tetrachloride under anhydrous conditions. A unique supramolecular motif was observed when compared with previously published pyrophosphoramide structures having two different intermolecular hydrogen bonding synthons. Furthermore, the potential of a wider variety of supramolecular structures in which similar pyrophosphoramides can crystallise was recognised. Proton (1H) and Phosphorus 31 (31P) Nuclear Magnetic Resonance (NMR) spectroscopy, infrared (IR) spectroscopy, mass spectrometry (MS) were carried out to complete the analysis of the compound.

Synthesis, crystal structure and 71Ga MAS NMR spectroscopy of a novel gallium phosphatooxalate: [Ga5(OH)2(C10H9N2)(C2O4)(PO4)4]·2H2O

1999 ◽  
pp. 1473-1474 ◽  
Author(s):  
Ching-Yeh Chen ◽  
Peter P. Chu ◽  
Kwang-Hwa Lii ◽  
Kwang-Hwa Lii
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Mas Nmr

Crystal structure of optically active poly(isopropylethylene oxide)

1975 ◽  
Vol 13 (2) ◽  
pp. 285-294 ◽  
Author(s):  
Yasuhiro Takahashi ◽  
Hiroyuki Tadokoro ◽  
Tsuneo Hirano ◽  
Akira Sato ◽  
Teiji Tsuruta
Keyword(s):  
Crystal Structure ◽  
Optically Active

Nuclear magnetic resonance studies on the anions [M(SnCl3)5Cl]4− (M = Ru, Os) and [Ru(SnCl3)5(MeCN)]3−: the X-ray crystal structure of [N(C2H5)4]4[Ru(SnCl3)5Cl]

1982 ◽  
Vol 60 (11) ◽  
pp. 1304-1316 ◽  
Author(s):  
Louis J. Farrugia ◽  
Brian R. James ◽  
Claude R. Lassigne ◽  
Edward J. Wells
Keyword(s):  
Crystal Structure ◽  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Octahedral Geometry ◽  
Coupling Constants ◽  
Order Effects ◽  
Magnetic Resonance Studies ◽  
X Ray ◽  
Crystallographic Study

The octahedral anions [M(SnCl3)5Cl]4− (M = Ru, Os) have been fully characterized by 119Sn FT nmr spectroscopy. For M = Ru, 117Sn and 115Sn nmr spectra were also recorded, and an X-ray crystallographic study was carried out on the tetraethylammonium salt, isolated as a disolvate from acetonitrile. The Ru—Sn bond lengths indicate some degree of dπ–dπ interactions. The slight distortions from octahedral geometry are discussed in connection with the packing of the chlorine atoms. The Sn nmr spectra reveal the first observed coupling to a 99Ru nucleus (I = 5/2, 12.7% natural abundance), very large 2J(119Sn—117Sn) coupling constants, and the first observed second-order effects on a heteronuclear system. The octahedral anion [Ru(SnCl3)5(MeCN)]3− was also synthesized as the tetraethylammonium salt and characterized spectroscopically.

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