A comparative study of the stereochemistry of 4-acetyl-, formyl- and carboxy-benzo-9-crown-3 ether via X-ray crystallography and solid state and solution NMR spectroscopy

Macromolecular structure determination by X-ray crystallography and solution NMR spectroscopy has experienced unprecedented growth during the past decade.

Download Full-text

X-ray crystallography and solution NMR spectroscopy characterization of heptakis(2,3-di-O-acetyl-6-bromo-6-deoxy)cyclomaltoheptaose

Carbohydrate Research ◽

10.1016/j.carres.2004.01.012 ◽

2004 ◽

Vol 339 (6) ◽

pp. 1189-1194 ◽

Cited By ~ 4

Author(s):

Petros Giastas ◽

Kyriaki Eliadou ◽

Zoi F. Plyta ◽

Konstantina Yannakopoulou ◽

Irene M. Mavridis

Keyword(s):

Nmr Spectroscopy ◽

Solution Nmr ◽

X Ray ◽

X Ray Crystallography ◽

Solution Nmr Spectroscopy

Download Full-text

Dimeres Di(N-lithium–tert–butylamino)bis(dimethylamino)silan - [Si(N(CH3)2)2(NLiC(CH3)3)2]2 – Darstellung und Kristallstruktur / Dimeric Di(N -lithio-tert-butylamino)bis(dimethylamino)silane - [Si(N(CH3)2)2(NLiC(CH3)3)2]2 – Synthesis und Crystal Structure

Zeitschrift für Naturforschung B ◽

10.1515/znb-2001-0115 ◽

2001 ◽

Vol 56 (1) ◽

pp. 90-94 ◽

Cited By ~ 1

Author(s):

Josef Engering ◽

Eva-Maria Peters ◽

Martin Jansen

Keyword(s):

Crystal Structure ◽

Mass Spectrometry ◽

Solid State ◽

Nmr Spectroscopy ◽

Single Crystal ◽

Title Compound ◽

Solution Nmr ◽

X Ray Diffraction ◽

X Ray ◽

Solution Nmr Spectroscopy

Abstract [Si(N(CH3)2)2(NLiC(CH3)3)2]2 results from the reaction of silicon tetrachloride with excess terf-butylamine, followed by halogen substitution with LiN(CH3)2, and treatment with n-butyllithium in hexane. The title compound, found to be dimeric in the solid state, was characterised by single crystal X-ray diffraction (triclinic, Pi , a = 10.208(2), b = 12.140(2), c = 15.658(3) Å , a = 79.02(3), ß = 82.80(3), γ = 67.19(3)°, Z = 2, C24H60Li4N8Si2 ), and by solid state and solution NMR-spectroscopy and mass spectrometry.

Download Full-text

Synthesen und Kristallstrukturen von Bis(N-lithiumtrimethylsilylamino)- bis(dimethylamino)silan und 1,1-Dichloro-2,4-bis(trimethylsilylamino)- 3,3-bis(dimethylamino)siladiazatitanacyclobutan / Syntheses and Crystal Structures of Bis(N-lithio-trimethylsilylamino)bis(dimethylamino)- silane and 1,1-Dichloro-2,4-bis(trimethylsilylamino)-3,3-bis(dimethylamino)siladiazatitanacyclobutane

Zeitschrift für Naturforschung B ◽

10.1515/znb-2002-0902 ◽

2002 ◽

Vol 57 (9) ◽

pp. 976-982

Author(s):

Josef Engering ◽

Eva-Maria Peters ◽

Martin Jansen

Keyword(s):

Mass Spectrometry ◽

Solid State ◽

Nmr Spectroscopy ◽

Single Crystal ◽

Titanium Tetrachloride ◽

Solution Nmr ◽

Molar Ratio ◽

X Ray Diffraction ◽

X Ray ◽

Solution Nmr Spectroscopy

Bis(N-lithio-trimethylsilylamino)bis(dimethylamino)silane (1) is formed in the reaction of silicon tetrachloride with excess hexamethyldisilazane, followed by halogen substitution using two equivalents of LiN(CH3)2, and treatment with two equivalents of n-butyllithium in hexane. 1, found to be dimeric in the solid state, was characterised by single crystal X-ray diffraction (monoclinic, C2/c, a = 1925.2(4), b = 1501.7(2), c = 1389.7(3) pm, β= 101.98(2), Z = 4, C20H60Li4N8Si6), and by solid state and solution NMR spectroscopy and mass spectrometry. Further reaction with titanium tetrachloride (molar ratio 1:1) yields orange crystals of the dimer [TiClf(μ2-NSi(CH3)3)2Si(N(CH3)2)μ2-Cl]2 (2) characterised by single crystal X-ray diffraction (triclinic, P1, a = 942.1(4), b = 991.7(4), c = 1222.6(5) pm, α= 90.12(1), β= 94.42(2), γ= 107.64(1)°, Z = 1, C20H60Cl4N8Si6Ti2)

Download Full-text