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"Rh(I)-Catalyzed Denitrogenative Transformations of 1,2,3-Thiadiazoles:" by Marina A. Tokareva, Indrek Pernik et al.

Ligand-controlled rhodium(I)-catalyzed denitrogenative transformations of a range of 4-vinyl-1,2,3-thiadiazoles possessing electron-donating substituents at the C5-position of the heterocycle have been demonstrated. With [Rh(COD)2]BF4, vinylic 1,2,3-thiadiazoles undergo an intramolecular transannulation reaction to afford substituted furans. In contrast, the [Rh(COD)DPPF]BF4catalytic system inhibits the intramolecular reaction but promotes intermolecular transannulation with both electron-deficient and electron-rich terminal alkynes, providing access to densely functionalized thiophenes with unexpected regioselectivity. Experimental and computational mechanistic studies were performed to gain insights into the Rh(I)-catalyzed intramolecular transannulation of vinylic 1,2,3-thiadiazoles, with a focus on understanding the influence of the C5-substituent on reactivity and the role of the DPPF ligand. Importantly, our crystallographic data uncovered that the true structure of the organorho ....

4 Thiadiazole , Dft Calculations , Rhodium Catalyst ,

MSNBC The 11th Hour With Stephanie Ruhle June 4, 2024 06:05:00

Hours. and while we do not know which he said, we ll have more on those details ahead. let s turn out to my good friend ali velshi, he joins us now from lviv, where s been reporting across poland, hungary, ukraine, for weeks. ali, extraordinary reporting, were luckier there. tell us what s happening tonight, because it hasn t been a peaceful night where you are. it hasn t. only this evening, air sirens go off several times a day, but we had earlier tonight was something that felt closer and bigger. about 40 miles from here, there was some sort of shelling. we are not yet determined what was hit, but there was selectivity. which, of course in the course of last couple of days, has been taking a different tone. but the discovery of those bodies in wichita, and other places. there where your training troops are taken over the russian troops, and they discovered atrocities. what is making people in this country, i m volodymyr zelenskyy, and the united states nations where a bottle, how t ....

Ali Velshi , Hasn T , It Hasn T , Air Sirens , Volodymyr Zelenskyy , War Of Attrition ,

MSNBC The 11th Hour With Stephanie Ruhle June 4, 2024 03:05:00

That they hold in russia. tomorrow, the white house will unveil its latest round of sanctions against the country, and also tonight, we re following the latest of the january 6th investigation. ellis committee heard from the former president s daughter, ivanka trump, earlier today. she testified for almost eight hours. and while we do not know which he said, we ll have more on those details ahead. let s turn out to my good friend ali velshi, he joins us now from lviv, where s been reporting across poland, hungary, ukraine, for weeks. ali, extraordinary reporting, were luckier there. tell us what s happening tonight, because it hasn t been a peaceful night where you are. it hasn t. only this evening, air sirens go off several times a day, but we had earlier tonight was something that felt closer and bigger. about 40 miles from here, there was some sort of shelling. we are not yet determined what was hit, but there was selectivity. which, of course in the course of last couple of days, ....

Volodymyr Zelenskyy , Ivanka Trump , White House , Ellis Committee Heard , January 6th Investigation , January 6th , Ali Velshi , Hasn T , It Hasn T , Air Sirens ,

MSNBC Morning Joe January 4, 2022 12:39:00

Debt ceiling. they need to do it again. and you know, joe, there is a a question at the heart of it. how we address this problem is everything how we take ourselves to be. who are we as a democracy? for much of our history, we have been a democracy for white men. and we have never really grappled of what it mept and what it means to be a genuine lynn multi general, we have been in sets with selectivity. this issues cut to the heart of american identity. it s not about black folks but all of us. we need to understand the gravity of it as we approach this occasion. it s a defining moment for the republican party. ....

King Joe , Debt Ceiling , Genuine Lynn Multi General , All Of Us , American Identity ,

Carbon molecular sieve integrated graphene sensor

Graphene, an atomic-thick sheet of carbon has found immense applications in gas sensors due to its single-molecule sensitivity, low-noise levels, and high carrier density. However, graphene’s much . ....

R Sankar Ganesh , Masashi Hattori , Kenichi Shimomai , Hiroshi Mizuta , A Osazuwa Gabriel , Hisashi Maki , Japan Advanced Institute Of Science , Manoharan Muruganathan , Senior Lecturer , Professor Hiroshi Mizuta , Japan Advanced Institute , Gas Sensors , Activated Carbon , Chemical Vapor Deposition ,