Synthesis and structural characterization of an unusual silylzirconium hydride complex

1986 ◽  
Vol 64 (8) ◽  
pp. 1677-1679 ◽  
Author(s):  
Clare Aitken ◽  
John F. Harrod ◽  
Edmond Samuel
Keyword(s):  
Structural Characterization ◽  
Hydride Complex ◽  
Nmr Data ◽  
Dehydrogenative Coupling ◽  
Small Excess

Dimethylzirconocene and dihydridozirconocene both catalyze the dehydrogenative coupling of primary and secondary organosilanes. Primary silanes give linear polysilanes and secondary silanes give tetraorganodisilanes. The reaction of dimethylzirconocene with a small excess of phenylsilane gives the unusual unsymmetrically substituted zirconocenesilylhydride dimer: Cp2Zr(SiMePhH)(μ-H)2(PhH2Si)ZrCp2. The structure of this product is deduced from a combination of nmr and crystallographic results. Although the nmr data suggest that dihydridozirconocene reacts with phenylsilane to give the corresponding symmetrical dimer (Me replaced by H) in solution, attempts to isolate this compound have not been successful.

scholarly journals Structural Characterization of a Flexible Two-Domain Protein in Solution Using Small Angle X-Ray Scattering and NMR Data

Structure ◽  
2014 ◽  
Vol 22 (12) ◽  
pp. 1862-1874 ◽  
Author(s):  
Alexander Lemak ◽  
Bin Wu ◽  
Adelinda Yee ◽  
Scott Houliston ◽  
Hsiau-Wei Lee ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Nmr Data ◽  
Domain Protein ◽  
Ray Scattering

Synthesis and Structural Characterization of {[Me2Si(C5Me4)2]Zr(η2-C2H4)H}2Mg:  Anansa-Zirconocene Ethylene−Hydride Complex

1998 ◽  
Vol 120 (23) ◽  
pp. 5830-5831 ◽  
Author(s):  
Hyosun Lee ◽  
Tony Hascall ◽  
Peter J. Desrosiers ◽  
Gerard Parkin
Keyword(s):  
Structural Characterization ◽  
Hydride Complex

Structural characterization of Cd3(O3PC2H4CO2)2·2H2O from in-house X-ray powder data and NMR

2005 ◽  
Vol 61 (6) ◽  
pp. 669-674 ◽  
Author(s):  
Naima Bestaoui ◽  
Xiang Ouyang ◽  
Florence Fredoueil ◽  
Bruno Bujoli ◽  
Abraham Clearfield
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Structural Characterization ◽  
Title Compound ◽  
Solid State Nmr ◽  
Hydrothermal Reaction ◽  
X Ray ◽  
Space Groups ◽  
Nmr Data

The title compound poly[[bis(μ-2-carboxylatoethylphosphonato)cadmium] dihydrate], Cd3(O3PC2H4CO2)2·2H2O, was prepared by a hydrothermal reaction and its crystal structure determined from in-house powder data. The structure was solved in both P21/c and P21 space groups. The refinement converged with Rp = 0.1046, R wp = 0.1378 and Rf = 0.0763 in P21/c. However, the solid-state NMR data could not be explained. The structure was then solved in P21 and the refinement converged with Rp = 0.0750, R wp = 0.1022 and Rf = 0.0409 and satisfied the NMR requirements.

Synthesis and structural characterization of a mixed-ring rhenocene hydride complex, (.eta.5-cyclopentadienyl) (.eta.5-pentamethylcyclopentadienyl)hydridorhenium

1989 ◽  
Vol 28 (14) ◽  
pp. 2890-2893 ◽  
Author(s):  
Rocco A. Paciello ◽  
Paul Kiprof ◽  
Eberhardt Herdtweck ◽  
Wolfgang A. Herrmann
Keyword(s):  
Structural Characterization ◽  
Hydride Complex

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

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