Boron halides as reagents in inorganic syntheses. Part IV. Preparation of tris-µ-chloro-hexabromo-triangulo-trirhenium(III)(3Re–Re) and Re3I9; halogen exchange reactions with Re3Cl9and the crystal structure of a sublimation product of tris-µ-chloro-hexabromo-triangulo-trirhenium(III)(3Re–Re)

1972 ◽  
pp. 500-503 ◽  
Author(s):  
M. A. Bush ◽  
P. M. Druce ◽  
M. F. Lappert
Keyword(s):  
Crystal Structure ◽  
Exchange Reactions ◽  
Halogen Exchange ◽  
Boron Halides

scholarly journals meso-iodo- and meso-iodovinylporphyrins via organopalladium porphyrins and the crystal structure of 5-iodo-10,20-diphenylporphyrin

2006 ◽  
Vol 10 (03) ◽  
pp. 176-185 ◽  
Author(s):  
Farzad Atefi ◽  
Oliver B. Locos ◽  
Mathias O. Senge ◽  
Dennis P. Arnold
Keyword(s):  
Crystal Structure ◽  
Reaction Times ◽  
Exchange Reactions ◽  
One Pot ◽  
X Ray ◽  
Halogen Exchange ◽  
Palladium Catalyzed ◽  
Catalyzed Reactions

The regiospecific halogen exchange reactions of various easily accessible meso-bromoporphyrins to obtain meso-iodoporphyrins, using η1-palladioporphyrins as intermediates, have been investigated. This one-pot methodology allows the isolation of meso-iodoporphyrins in excellent yields with short reaction times. Similarly meso-(2-bromoethenyl)porphyrins can be converted to their iodoethenyl analogues. These iodoporphyrins show great potential as starting materials for various palladium catalyzed reactions. The X-ray crystal structure of 5-iodo-10,20-diphenylporphyrin has been determined.

Third-phase catalytic activity of halogen exchange reactions in phase transfer catalytic system

1997 ◽  
Vol 52 (20) ◽  
pp. 3511-3520 ◽  
Author(s):  
Tadaatsu Ido ◽  
Takanobu Yamamoto ◽  
Gong Jin ◽  
Shigeo Goto
Keyword(s):  
Catalytic Activity ◽  
Catalytic System ◽  
Phase Transfer ◽  
Exchange Reactions ◽  
Third Phase ◽  
Halogen Exchange

scholarly journals Regioselective Synthesis of 5-Propyl-2-((trityloxy)methyl)thiophene-3-carbaldehyde

Molbank ◽  
10.3390/m1289 ◽  
2021 ◽  
Vol 2021 (4) ◽  
pp. M1289
Author(s):  
Sukanta Bar
Keyword(s):  
Exchange Reaction ◽  
Regioselective Synthesis ◽  
Exchange Reactions ◽  
Halogen Exchange

5-propyl-2-((trityloxy)methyl)thiophene-3-carbaldehyde was synthesized by using the concept of chemo- and regioselective Br/Li exchange reaction from 3-bromo-5-propyl-2-((trityloxy)methyl)thiophene. This is a five-step protocol starting from thiophene with an overall yield of 33%. These lithium/halogen exchange reactions were carried out at −78 °C to rt over the period of 1 to 18 h depending on the reactivity of electrophiles.

Impact of dynamic covalent chemistry and precise linker length on crystallization kinetics and morphology in ethylene vitrimers

Soft Matter ◽  
2022 ◽  
Author(s):  
Bhaskar Soman ◽  
Yoo Kyung Go ◽  
Chengtian Shen ◽  
Cecilia Leal ◽  
Christopher M. Evans
Keyword(s):  
Crystal Structure ◽  
Melting Temperature ◽  
Crystallization Kinetics ◽  
Polymer Networks ◽  
Exchange Reactions ◽  
Dynamic Covalent Chemistry ◽  
Linker Length

Vitrimers, dynamic polymer networks with topology conserving exchange reactions, can lead to unusual evolution of the melting temperature and crystal structure of ethylene networks.

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