Structures of the silver complexes with lutidines according to the NMR data. Crystal structure of [AgNO3(3,5-Lut)2]

2013 ◽  
Vol 39 (2) ◽  
pp. 187-193 ◽  
Author(s):  
S. G. Sakharov ◽  
V. V. Kovalev ◽  
Yu. E. Gorbunova ◽  
Yu. V. Kokunov
Keyword(s):  
Crystal Structure ◽  
Silver Complexes ◽  
Nmr Data

scholarly journals Structural Investigations of C-Nitrosobenzenes. Part 3.1 Solid-state and Solution 13C NMR Studies, and Crystal Structure of E-(4-CIC6H4NO)2

1999 ◽  
Vol 23 (3) ◽  
pp. 202-203
Author(s):  
Daniel A. Fletcher ◽  
Brian G. Gowenlock ◽  
Keith G. Orrell ◽  
David C. Apperley ◽  
Michael B. Hursthouse ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
13C Nmr ◽  
Nmr Studies ◽  
Structural Investigations ◽  
Nmr Data ◽  
C Nmr

Solid-state and solution 13C NMR data for the monomers and dimers of 3- and 4-substituted nitrosobenzenes, and the crystal structure of E-(4-CIC6H4NO)2 are reported.

Crystal structure and magnetic properties of Al2O3 nanoparticles by 27Al NMR data

2017 ◽  
Vol 59 (3) ◽  
pp. 514-519 ◽  
Author(s):  
K. N. Mikhalev ◽  
A. Yu. Germov ◽  
A. E. Ermakov ◽  
M. A. Uimin ◽  
A. L. Buzlukov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Al2o3 Nanoparticles ◽  
27Al Nmr ◽  
Nmr Data

Bis(triphenylphosphine)gold(I) Perrhenate

2013 ◽  
Vol 68 (11) ◽  
pp. 1173-1179 ◽  
Author(s):  
Sebastian A. Baer ◽  
Alexander Pöthig ◽  
Salem M. Bawaked ◽  
Hubert Schmidbaur ◽  
Florian Kraus
Keyword(s):  
Crystal Structure ◽  
Mixed Solvent ◽  
High Yield ◽  
Nmr Data ◽  
Π Stacking ◽  
Interionic Interactions ◽  
P Ligands

Bis(triphenylphosphine)gold(I) perrhenate [Ph3PAuPPh3]+ReO4 - has been prepared in high yield from Ph3PAuCl, Ph3P and AgReO4 in a mixed solvent. The compound is stable in air and decomposes at 235 °C. In the crystal structure, the two independent perrhenate anions are not approaching the gold centers of the two independent cations, but weak interionic interactions are entertained via π-π stacking of phenyl groups and C-H···O contacts. As three-blade chiral rotors, the Ph3P ligands of the cations are in a staggered conformation at the gold atoms with only slightly bent P-Au-P axes. IR and NMR data show no anomalies and are close to those of alkali or onium perrhenates.

Synthese und Eigenschaften einiger Silylethinylsilane; Molekülstruktur von Tetrakis(trimethylsilylethinyl)silan / Synthesis and Properties of Some Silylethynylsilane; Molecular Structure of Tetrakis(trimethylsilylethynyl)silane

1988 ◽  
Vol 43 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Hubert Schmidbaur ◽  
Jan Ebenhöch
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Single Crystal ◽  
Silicon Atom ◽  
Grignard Reagent ◽  
X Ray Diffraction ◽  
Tetrahedral Geometry ◽  
X Ray ◽  
Nmr Data

Abstract Trimethylsilylethine (1) has been prepared from C2H2, sodium and Me3SiCl in anisole. The product can be converted into a Grignard reagent Me3SiC≡CMgCl using iPrMgCl. This reagent yields the compounds Me3SiC≡CSiH3, (Me3SiC≡C)2SiH2, (Me3SiC≡C)3SiH, and (Me3SiC≡C)4Si (2-5) when treated with equivalent amounts of H3SiBr, H2SiBr2, HSiCl3, or SiCl4. respectively. The new silanes have been characterized by NMR data. The crystal structure of (Me3SiC≡C)4Si has been determined by single crystal X-ray diffraction. It shows the expected tetrahedral geometry at he central silicon atom with four linear SiC≡CSi linkages.

Preparation and characterization of some ruthenium(II) porphyrins containing tertiary phosphine axial ligands, including the crystal structure of (octaethylporphinato)bis(triphenylphosphine)ruthenium(II)

1984 ◽  
Vol 62 (4) ◽  
pp. 755-762 ◽  
Author(s):  
Sara Ariel ◽  
David Dolphin ◽  
George Domazetis ◽  
Brian R. James ◽  
Tak W. Leung ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phosphine Ligands ◽  
Tertiary Phosphine ◽  
X Ray ◽  
Porphyrin Complex ◽  
H Nmr ◽  
Axial Ligands ◽  
Nmr Data ◽  
Phosphine Complex

The ruthenium(II) porphyrin complex Ru(OEP)(PPh3)2 (OEP = the dianion of octaethylporphyrin) has been prepared from Ru(OEP)(CO)EtOH, and the X-ray crystal structure determined; as expected, the six-coordinate ruthenium is situated in the porphyrin plane and has two axial phosphine ligands. Synthesized also from the carbonyl(ethanol) precursors were the corresponding tris(p-methoxyphenyl)phosphine complex, and the Ru(TPP)L2 (TPP = the dianion of tetraphenylporphyrin, L = PPh3, P(p-CH3OC6H4)3, P″Bu3) and Ru(TPP)(CO)PPh3 complexes. Optical and 1H nmr data are presented for the complexes in solution. In some cases dissociation of a phosphine ligand to generate five-coordinate species occurs and this has been studied quantitatively in toluene at 20 °C for the Ru(OEP)L2 and Ru(TPP)L2 systems.

[5,10,15,20-Tetrakis(2,6-dimethoxyphenyl)porphyrinato]nickel(II)–toluene–dichloromethane (3/2/4):a mixed solvate

2007 ◽  
Vol 63 (11) ◽  
pp. m2824-m2824
Author(s):  
Diane Conrad ◽  
Jennifer DeCoskey ◽  
Christopher Yeisley ◽  
Matthias Zeller ◽  
Allen D. Hunter ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Glacial Acetic Acid ◽  
Electronic Spectroscopy ◽  
The Other ◽  
Inversion Center ◽  
Asymmetric Unit ◽  
Nickel Ion ◽  
H Nmr ◽  
Nmr Data ◽  
Toluene Molecule

The crystal structure, electronic spectroscopy, and 1H NMR data for the title compound, [Ni(C52H44N4O8)]·0.67C7H8·1.33CH2Cl2, are reported. The compound was prepared by the reaction of nickel(II) acetate with the ligand in refluxing glacial acetic acid. The asymmetric unit consists of 1.5 nickel porphyrins, two dichloromethane molecules and one toluene molecule. One of the nickel–porphyrinate molecules is located on an inversion center and is planar in the solid state, while the other assumes a saddle-shaped geometry. In both cases, the nickel ion is four-coordinate.

Tetrakis(trimethylstannyl)cyclopentadiene. Improved synthesis, 1H-, 13C- and 119Sn-NMR data and crystal structure

2000 ◽  
Vol 608 (1-2) ◽  
pp. 86-88 ◽  
Author(s):  
Norman Lenze ◽  
Beate Neumann ◽  
Hans-Georg Stammler ◽  
Peter Jutzi
Keyword(s):  
Crystal Structure ◽  
Nmr Data ◽  
119Sn Nmr

Pyridin-4-on-Nueleosid+: Stabilisierung der Struktur im Kristall und in wäßriger Lösung / Pyridine-4-on Nucleoside: Stabilisation of the Structure in the Crystal and in Aqueous Solution

1981 ◽  
Vol 36 (12) ◽  
pp. 1632-1639 ◽  
Author(s):  
Peter M. Kaiser ◽  
Reinhard Nesper ◽  
Karl-Friedrich Tebbe ◽  
Herbert Witzel
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Water Molecule ◽  
Ring System ◽  
The Other ◽  
Decisive Factor ◽  
Monoclinic Space Group ◽  
Pyrimidine Nucleosides ◽  
Nmr Data ◽  
Bonding Scheme

Abstract C10H13NO5 • H2O is monoclinic, space group P2i with a = 773.7 pm, b = 814.6 pm, c= 932.6 pm, β = 109.36° at 143 K, Z = 2. The crystal structure has been refined to R =0.031 with 1340 counter reflections. Features of this nucleoside include an orientation of the base at the glycosidic bond N(l)-C(l') in the anii-range (52.5°), a ribosyl moiety in the C(2')-endo(S) conformation and in contrast to many other nucleosides a trans arrange-ment at C(4')-C(5'). This unusual conformation is stabilized by a distinct H-bonding scheme including the water molecule and the oxygen of the adjacent pyridin-4-on ring system. NMR data indicate on the other side that in solution the conformation of the nucleoside is anti/g + similar to that of other pyrimidine nucleosides. The 5'-OH group replaces the water molecule in the crystal. The preferred anti position of the base cannot be explained by an interaction of H(2,6) of the base with the 5'-OH group or the C(4) oxygen. Both protons which couple with H(3,5) coalesce in a single sharp doublet. Water entropy seems to be the decisive factor for the stabilization of the anti/g+ conformation in aqueous solution.

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