ChemInform Abstract: Electrophilic Additions to Functional Groups Containing a Triple Bond

ChemInform ◽  
2010 ◽  
Vol 28 (10) ◽  
pp. no-no
Author(s):  
W. DRENTH
Keyword(s):  
Functional Groups ◽  
Triple Bond ◽  
Electrophilic Additions

ELECTROPHILIC ADDITIONS TO ALKYNES AND PARTICIPATION OF THE TRIPLE BOND IN SOLVOLYSIS

Vinyl Cations ◽  
1979 ◽  
pp. 24-151
Author(s):  
PETER J. STANG ◽  
ZVI RAPPOPORT ◽  
MICHAEL HANACK ◽  
L.R. SUBRAMANIAN
Keyword(s):  
Triple Bond ◽  
Electrophilic Additions

ADSORPTION STATES AND SITE CONVERSIONS OF PHENYLACETYLENE ON Si(100)2 × 1 CALCULATED BY DFT

2012 ◽  
Vol 11 (05) ◽  
pp. 1089-1099 ◽  
Author(s):  
MARILENA CARBONE ◽  
RUGGERO CAMINITI
Keyword(s):  
Functional Groups ◽  
Phenyl Ring ◽  
Triple Bond ◽  
Energy Barriers ◽  
Adsorption Sites ◽  
Bifunctional Molecule

The adsorption on Si(100)2 × 1 of PhenylAcetilene (PA), a bifunctional molecule with a phenyl ring and a triple bond, may occur through each group, selectively, or both functional groups simultaneously. The most favorable adsorption sites upon adsorption were calculated by DFT. Furthermore, several energy barriers were calculated: The ones connecting the physisorbed to the chemisorbed states, as well as the interconversion barriers of different chemisorbed states. The conversion of physisorbed-to-chemisorbed states has barriers of 0.11–0.19 eV. The barriers of sites inter-conversions are all higher (1.11–1.36 eV) and suggest a difficult post-chemisorption surface rearrangement.

Improving integration between functional groups: A case in organization change and implications for theory and practice

1971 ◽  
Author(s):  
Warren G. Bennis ◽  
Michael Beer ◽  
Gerald R. Pieters ◽  
Alan T. Hundert ◽  
Samuel H. Marcus ◽  
...  
Keyword(s):  
Functional Groups ◽  
Organization Change ◽  
Theory And Practice

HYDROXYAPATITE, ALGINATE, AND CHITOSAN FOR BONE SCAFFOLDS: SPECTROSCOPY STUDY

2016 ◽  
Vol 19 (2) ◽  
pp. 93-100
Author(s):  
Lalita El Milla
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Functional Groups ◽  
Bone Growth ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Tissue Engineering Scaffolds ◽  
Hydroxyapatite Powder ◽  
Materials Used

Scaffolds is three dimensional structure that serves as a framework for bone growth. Natural materials are often used in synthesis of bone tissue engineering scaffolds with respect to compliance with the content of the human body. Among the materials used to make scafffold was hydroxyapatite, alginate and chitosan. Hydroxyapatite powder obtained by mixing phosphoric acid and calcium hydroxide, alginate powders extracted from brown algae and chitosan powder acetylated from crab. The purpose of this study was to examine the functional groups of hydroxyapatite, alginate and chitosan. The method used in this study was laboratory experimental using Fourier Transform Infrared (FTIR) spectroscopy for hydroxyapatite, alginate and chitosan powders. The results indicated the presence of functional groups PO43-, O-H and CO32- in hydroxyapatite. In alginate there were O-H, C=O, COOH and C-O-C functional groups, whereas in chitosan there were O-H, N-H, C=O, C-N, and C-O-C. It was concluded that the third material containing functional groups as found in humans that correspond to the scaffolds material in bone tissue engineering.

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