Structural Determination of a Metastable Ag27 Nanocluster and Its Transformations into Ag8 and Ag29 Nanoclusters

2021 ◽  
Author(s):  
Chen Zhu ◽  
Tenfei Duan ◽  
Hao Li ◽  
Xiao Wei ◽  
Xi Kang ◽  
...  
Keyword(s):  
Structure Determination ◽  
Structural Determination ◽  
To Receive

Research on nanocluster transformation has generally focused on stable nanoclusters, while analysis on structure evolutions of metastable nanoclusters just began to receive attention recently. Herein, we reported the structure determination...

Metallkomplexe mit funktionalisierten Schwefelliganden, V Ruthenium(II)-Alkyl- und -Arylthiosulfinato-Komplexe. Kristallstrukturanalyse von CpRu(PPh3)(CO)[S-S(O)-CH2-C6H5] / Metal Complexes of Functionalized Sulfur Containing Ligands, V Ruthenium(II)-Alkyl-and -Arylthiosulfinato Complexes. X-Ray Structure Determination of CpRu(PPh3)(CO)[S-S(O)-CH2-C6H5]

1993 ◽  
Vol 48 (5) ◽  
pp. 627-635 ◽  
Author(s):  
Wolfgang Weigand ◽  
Gabriele Bosl ◽  
Christian Robl ◽  
Jürgen Kroner
Keyword(s):  
Bond Length ◽  
Structure Determination ◽  
Spectroscopic Data ◽  
Structural Determination ◽  
Chiral Complexes ◽  
X Ray ◽  
Extended Hückel Calculations ◽  
Sulfur Containing ◽  
Sulfur Bond

Compounds of the type CpRu(PPh3)(L)(SH) [L = PPh3 (2), CO (4)] react with N-alkyl and -arylsulfinyl phthalimides 3a-f to give the chiral complexes CpRu(PPh3)(L)[S-S(O)-R] (L = PPh3, 5a: R = C4H9,5b: R = C12H25,5d: R = C18H37,5e: R = Tol; L = CO, 6a: R = C4H9,6b: R = C12H25,6c: R = C16H33,6d: R = C18H37,6f: R = CH2Ph). With 6a-c diastereoselectivities of 5:2, with 6d 5:1, and with 6f 10:3, respectively, are observed. The compounds 5,6 are characterized by their spectroscopic data; the X-ray structural determination of u-6f shows a sulfur-sulfur bond length of 208,6 (3) pm, the dihedral angle Ru-S(1)-S(2)-C(25) is 170,8°. Extended Hückel calculations give information about the rotational barrier around the S-S(O) axis.

Structural Determination of the InSb(110) Surface by the Automated Tensor LEED Program

1998 ◽  
Vol 05 (01) ◽  
pp. 241-247 ◽  
Author(s):  
E. A. Soares ◽  
V. E. De Carvalho ◽  
C. M. C. De Castilho
Keyword(s):  
Surface Structure ◽  
Debye Temperature ◽  
Structure Determination ◽  
Structural Determination

The InSb(110) surface structure has been re-examined using the tensor LEED approach. A refinement of the structure as well as the influence of the Debye temperature on the structure determination is presented.

SEVERAL COMPOUNDS ISOLATED FROM CENTELLA ASIATICA

2011 ◽  
pp. 92-97
Author(s):  
Thi Hoai Nguyen ◽  
Thi Thao Trang Dang
Keyword(s):  
Physical Properties ◽  
Structure Determination ◽  
Centella Asiatica ◽  
Liquid Extraction ◽  
Structural Determination ◽  
Uv Spectrum ◽  
Pure Substances ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Objectives: Research on extraction, isolation and structural determination of several chemical flavonoids extracted from Centella asiatica (L.) URB. - Apiaceae. Materials and method: Centella asiatica is collected in Phong Dien district - Thua Thien Hue. Extracts isolated by solid-liquid extraction and chromatography coordination. Structure determination based on the physical properties and spectral data. Results: From species Centella asiatica (L.) URB. - Apiaceae collected at Phong Dien, Thua Thien Hue has isolated two pure substances. Based on UV spectrum, IR, MS, NMR identified the compound as Quercetin and Kaempferol.

EXTRACTION, ISOLATION AND STRUCTURE DETERMINATION OF MADECASSOID FROM CENTELLA ASIATICA

2012 ◽  
pp. 47-52
Author(s):  
Thi Hoai Nguyen ◽  
Thi Diem Phuc Le
Keyword(s):  
Physical Properties ◽  
Spectral Data ◽  
Structure Determination ◽  
Centella Asiatica ◽  
Pure Substance ◽  
Structural Determination ◽  
Coordination Structure ◽  
Nmr Spectrum

Background: Research on extraction, isolation and structural determination of a chemical saponin extracted from Centella asiatica (L.) Urb. - Apiaceae. Materials and method: Centella asiatica is collected in Quang Dien district - Thua Thien Hue. Extracts isolated by chromatography coordination. Structure determination based on the physical properties and spectral data. Results: From species Centella asiatica (L.) Urb. - Apiaceae collected at Quang Dien, Thua Thien Hue has isolated one pure substance. Based on NMR spectrum identified the compound as madecassoid.

Ab initio structure determination of cytochrome c6 by combined reciprocal space-real space approach

2003 ◽  
Vol 218 (1) ◽  
Author(s):  
K. Chowdhury ◽  
S. Ghosh ◽  
M. Mukherjee
Keyword(s):  
Cytochrome C ◽  
Ab Initio ◽  
Structure Determination ◽  
Direct Method ◽  
Real Space ◽  
Reciprocal Space ◽  
Cytochrome C6 ◽  
Ab Initio Structure ◽  
Space Approach

AbstractThe direct method program SAYTAN has been applied successfully to redetermine the structure of cytochrome c

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