Supramolecular structure and anomer-selective formation of polyglucuronic acid

2012 ◽  
Vol 62 (5) ◽  
pp. 804-810
Author(s):  
I. Alina Stetco ◽  
Erika F Merschrod S
Keyword(s):  
Supramolecular Structure ◽  
Polyglucuronic Acid ◽  
Selective Formation

Metal-Metal Cooperative Bond Activation by Heterobimetallic Alkyl, Aryl, and Acetylide PtII/CuI Complexes

2020 ◽  
Author(s):  
Shubham Deolka ◽  
Orestes Rivada Wheelaghan ◽  
Sandra Aristizábal ◽  
Robert Fayzullin ◽  
Shrinwantu Pal ◽  
...  
Keyword(s):  
Alkyl Group ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Terminal Alkyne ◽  
Alkyl Aryl ◽  
Metal Metal ◽  
The Stability ◽  
Selective Formation ◽  
Organoplatinum Compounds

We report selective formation of heterobimetallic PtII/CuI complexes that demonstrate how facile bond activation processes can be achieved by altering reactivity of common organoplatinum compounds through their interaction with another metal center. The interaction of the Cu center with Pt center and with a Pt-bound alkyl group increases the stability of PtMe2 towards undesired rollover cyclometalation. The presence of the CuI center also enables facile transmetalation from electron-deficient tetraarylborate [B(ArF)4]- anion and mild C-H bond cleavage of a terminal alkyne, which was not observed in the absence of an electrophilic Cu center. The DFT study indicates that the role of Cu center acts as a binding site for alkyne substrate, while activating its terminal C-H bond.

Gold Catalyzed Hydroamination of Propargylic Alcohols: Controlling Divergent Reaction Pathways to Access 1,3-Aminoalcohols, 3-Hydroxyketones or 3-Aminoketones

2018 ◽  
Author(s):  
Victor Laserna ◽  
Tom Sheppard
Keyword(s):  
Gold Catalysis ◽  
Reaction Pathways ◽  
High Yield ◽  
Reaction Conditions ◽  
Propargylic Alcohols ◽  
Catalytic Quantity ◽  
Selective Formation ◽  
General Method

A versatile approach to the valorization of propargylic alcohols is reported, enabling controlled access to three different products from the same starting materials. Firstly, a general method for the hydroamination of propargylic alcohols with anilines is described using gold catalysis to give 3-hydroxy imines with complete regioselectivity. These 3-hydroxyimines can be reduced to give 1,3-aminoalcohols with high syn seletivity. Alternatively, by using a catalytic quantity of aniline, 3-hydroxyketones can be obtained in high yield directly from propargylic alcohols. Further manipulation of the reaction conditions enables the selective formation of 3-aminoketones via a rearrangement/hydroamination pathway.<br>

Acid-base properties and supramolecular structure ofN-[(hydroxymethyl)triazolyl]triflamides: DFT, ab initio, and FTIR study

2016 ◽  
Vol 30 (5) ◽  
pp. e3623 ◽  
Author(s):  
Bagrat A. Shainyan ◽  
Nina N. Chipanina ◽  
Larisa P. Oznobikhina ◽  
Vladimir I. Meshcheryakov
Keyword(s):  
Ab Initio ◽  
Supramolecular Structure ◽  
Acid Base ◽  
Ftir Study ◽  
Base Properties

Photo-responsive Schottky Diode Behavior of a Donor-Acceptor Co-crystal with Violet Blue Light Emission

CrystEngComm ◽  
2021 ◽  
Author(s):  
Sanjay Kumar ◽  
Soumen Singha ◽  
Rajkumar Jana ◽  
RITUPARNA MONDAL ◽  
Partha Pratim Bag ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transport Property ◽  
Schottky Diode ◽  
Electronic Transport ◽  
Supramolecular Structure ◽  
Light Emission ◽  
Electronic Transport Property ◽  
Blue Light Emission ◽  
Donor Acceptor ◽  
Diode Behavior

Herein, we report the crystal structure, supramolecular structure, electronic transport property and optoelectronic behaviour of a co-crystal made of tetrabromoterephthalic acid (TBTA) and quinoxaline (QUIN) (1:1). The sample has been...

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