Isolation and characterization of the first bis(2-pyridyl)carbyltitanium(iv) complex derived from the C–O bond cleavage of the alkoxide ligand in Cp*TiMe2(OCMePy2). X-Ray crystal structure of [Cp*Ti(μ-O)(CMePy2)]2 (Cp* = C5Me5)

2002 ◽  
pp. 11 ◽  
Author(s):  
Rosa Fandos ◽  
Carolina Hernández ◽  
Antonio Otero ◽  
Ana Rodríguez ◽  
Maria José Ruiz ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Bond Cleavage ◽  
X Ray ◽  
Isolation And Characterization ◽  
Cp Ti

Isolation and characterization of the pyridazine (pydz) bridged halogenotrimethylplatinum(IV) complexes [PtXMe3)2(μ-pydz)] (X = Cl, Br, I). X-ray crystal structure of [(PtIMe3)2(μ-pydz)]

Polyhedron ◽  
1994 ◽  
Vol 13 (17) ◽  
pp. 2501-2505 ◽  
Author(s):  
Edward W. Abel ◽  
Peter J. Heard ◽  
Keith G. Orrell ◽  
Michael B. Hursthouse ◽  
K.M. Abdul Malik
Keyword(s):  
Crystal Structure ◽  
X Ray ◽  
Isolation And Characterization

scholarly journals Crystallization and preliminary X-ray characterization of the 2,4′-dihydroxyacetophenone dioxygenase fromAlcaligenessp. 4HAP

2014 ◽  
Vol 70 (6) ◽  
pp. 823-826 ◽  
Author(s):  
G. Beaven ◽  
A. Bowyer ◽  
P. Erskine ◽  
S. P. Wood ◽  
A. McCoy ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Formic Acid ◽  
Molecular Oxygen ◽  
Aromatic Ring ◽  
Bond Cleavage ◽  
Its Sequence ◽  
Hydroxybenzoic Acid ◽  
X Ray

The enzyme 2,4′-dihydroxyacetophenone dioxygenase (or DAD) catalyses the conversion of 2,4′-dihydroxyacetophenone to 4-hydroxybenzoic acid and formic acid with the incorporation of molecular oxygen. Whilst the vast majority of dioxygenases cleave within the aromatic ring of the substrate, DAD is very unusual in that it is involved in C—C bond cleavage in a substituent of the aromatic ring. There is evidence that the enzyme is a homotetramer of 20.3 kDa subunits each containing nonhaem iron and its sequence suggests that it belongs to the cupin family of dioxygenases. By the use of limited chymotrypsinolysis, the DAD enzyme fromAlcaligenessp. 4HAP has been crystallized in a form that diffracts synchrotron radiation to a resolution of 2.2 Å.

The preparation and characterization of Pt(Se3PPh)(PR3)2; the X-ray crystal structure of Pt(Se3PPh)(dppe)·CH2Cl2

Polyhedron ◽  
1990 ◽  
Vol 9 (7) ◽  
pp. 987-990 ◽  
Author(s):  
Ivan P. Parkin ◽  
Mark J. Pilkington ◽  
Alexandra M.Z. Slawin ◽  
David J. Williams ◽  
J.Derek Woollins
Keyword(s):  
Crystal Structure ◽  
X Ray

Structural Systematics of Rare Earth Complexes. VII. Crystal Structure of Bis(2,2'/6',2␛-Terpyridinium) Octaaquaterbium(III) Heptachloride Hydrate

1994 ◽  
Vol 47 (2) ◽  
pp. 391 ◽  
Author(s):  
CJ Kepert ◽  
BW Skeleton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Single Crystal ◽  
Structural Characterization ◽  
Title Compound ◽  
Room Temperature ◽  
Chloride Ions ◽  
Full Matrix ◽  
X Ray

The room-temperature single-crystal X-ray structural characterization of the title compound (tpyH2)2[Tb(OH2)8]Cl7.~2⅓H2O is recorded. Crystals are triclinic, Pī , a 17.063(5), b 16.243(3), c 7.878(3) Ǻ, α 84.78(2), β 84.39(3), γ 87.81(2)°, Z = 2 formula units; 3167 'observed' diffractometer reflections were refined by full-matrix least-squares procedures to a residual of 0.057. Notable features of interest of the compound are the 'chelation' of chloride ions by the terpyridinium cations , and the existence of a free [Tb(OH2)8]2+ cation in the presence of an abundance of chloride ions.

Isolation and characterization of lignocellulosic fiber from jute bast by the organic solvent degumming system: an alkali-free method

2021 ◽  
pp. 004051752110154
Author(s):  
Zhihui Qin ◽  
Shuyuan Zhao ◽  
Liu Liu ◽  
Zhaohe Shi ◽  
Longdi Cheng ◽  
...  
Keyword(s):  
National Standards ◽  
X Ray Diffraction ◽  
High Concentration ◽  
X Ray ◽  
Lignocellulosic Fibers ◽  
Lignocellulosic Fiber ◽  
Isolation And Characterization ◽  
Alkali Consumption ◽  
Scanning Electron

Degumming is the dominant method for insolating lignocellulosic fibers in textile applications. Traditional alkaline degumming (TAL), as a common method, requires a high-concentration alkali and has been a severe challenge to the environment. In the research reported here, the possibility of innovative jute degumming by organic solvents 1-2 propylene glycol and a combination of additive green oxygen (GO-OS) was studied. The results revealed that fibers could be extracted by this system (under condition of 0.9% GO-OS, 180°C, 120 min), and obtained fibers with higher breaking tenacity (7.1 cN/dtex), yield (65.7%), breaking elongation (2.87%) and residual gum (11.7%), which all meet the requirement of the relevant Chinese Textile National Standards. Notably, the required reaction time (120 min) of the GO-OS system was 180 min shorter than that of the TAL method. Furthermore, the modifications introduced by the degumming effect on physicochemical aspects were characterized and confirmed by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction. This study provides a promising degumming method for separating jute lignocellulose without acid and alkali consumption.

Isolation and characterization of a tetranuclear Pt–Fe⋯Fe–Pt intermediate en route to the trinuclear Pt–Fe–Pt cluster

2017 ◽  
Vol 46 (40) ◽  
pp. 14012-14020
Author(s):  
Kazuhiro Uemura ◽  
Masahiro Taoka
Keyword(s):  
Single Crystal ◽  
Intermediate Compound ◽  
Mononuclear Complex ◽  
Synthetic Process ◽  
X Ray ◽  
Pt Complex ◽  
Isolation And Characterization ◽  
Physical Measurements ◽  
Pt Cluster

An intermediate compound of a tetranuclear Pt–Fe⋯Fe–Pt complex in the synthetic process to form a trinuclear Pt–Fe–Pt complex by mixing the “amidate-hanging” Pt mononuclear complex and iron sources was successfully isolated and characterized by single-crystal X-ray analysis and several physical measurements.

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