Quantitative Characterization of the Local Electrophilicity of Organic Molecules. Understanding the Regioselectivity on Diels−Alder Reactions

2002 ◽  
Vol 106 (29) ◽  
pp. 6871-6875 ◽  
Author(s):  
Luis R. Domingo ◽  
M. José Aurell ◽  
Patricia Pérez ◽  
Renato Contreras
Keyword(s):  
Organic Molecules ◽  
Diels Alder ◽  
Quantitative Characterization

Quantitative characterization of the global electrophilicity power of common diene/dienophile pairs in Diels–Alder reactions

Tetrahedron ◽  
2002 ◽  
Vol 58 (22) ◽  
pp. 4417-4423 ◽  
Author(s):  
Luis R Domingo ◽  
M.José Aurell ◽  
Patricia Pérez ◽  
Renato Contreras
Keyword(s):  
Diels Alder ◽  
Quantitative Characterization

scholarly journals On Ve-Degree-Based Irregularity Properties of the Crystallographic Structure of Molecules

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Akbar Jahanbani ◽  
Rana Khoeilar ◽  
Hajar Shooshtari
Keyword(s):  
Molecular Structure ◽  
Complex Network ◽  
Topological Structure ◽  
Organic Molecules ◽  
Crystallographic Structure ◽  
Quantitative Characterization ◽  
Material Engineering ◽  
Structure Of Molecules ◽  
Crystallographic Structures

Irregularity indices are usually used for quantitative characterization of the topological structure of nonregular graphs. In numerous applications and problems in material engineering and chemistry, it is useful to be aware that how irregular a molecular structure is? In this paper, we are interested in formulating closed forms of irregularity measures of some of the crystallographic structures of Cu 2 O p , q , r and crystallographic structure of titanium difluoride of T i F 2 p , q , r . These theoretical conclusions provide practical guiding significance for pharmaceutical engineering and complex network and quantify the degree of folding of long organic molecules.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

Sign in / Sign up

Export Citation Format

Share Document