然而，由1,2-负氢迁移驱动的碳正离子重排，比烷基迁移更快，由于其快速性而面临重大挑战。1,2-负氢迁移反应速度极快，活化能极低（约2-4 kcal/mol），部分受超共轭作用促进，使其反应速度显著快于SN1或E1反应。这种快速的反应性，以及较低的活化能垒 ...

INDIANAPOLIS — The Oklahoma City Thunder showed their bounce-back capability in Game 2. The Indiana Pacers know they better do the same in Game 3.

For the first time since 2000, the NBA Finals are headed to Indianapolis. The Pacers are even with the Oklahoma City Thunder at 1-all in the best-of-seven Finals as the series rolls into Indiana ...

June 4, 2025 at 4:06 AM EDT ... The shift to what’s known as T+1 is estimated to cost $36 million for large European custodians, according to a report by Firebrand Research.

The shift to what’s known as T+1 is estimated to cost $36 million for large European custodians, according to a report by Firebrand Research. That compares to a $13 million average cost similar firms ...

Inflation in the 20 countries that use the euro fell to 1.9% in May from 2.2% in April, helping clear the way for more interest rate cuts from the European ... Inflation slides to 1.9% in Europe, as ...

Inflation in the 20 countries that use the euro fell to 1.9% in May from 2.2% in April, helping clear the way for more interest rate cuts from the European Central Bank. Cuts could support growth ...

In modern organic chemistry, 1,2-hydride shifts of carbocations are generally considered to be highly rapid processes, typically exhibiting activation barriers of ∼2–4 kcal/mol─significantly faster ...

We report stereoselective access to hexahydrofluorene derivatives with three contiguous stereogenic centers based on a hydride-shift-triggered C(sp3)–H bond functionalization (internal redox reaction) ...

Europe’s moves in South China Sea are political gestures, won't shift hard strategic balance: Expert. Posted: June 3, 2025 | Last updated: June 3, 2025 ...

HAMPTON, Va. — Starting as early as Monday, a traffic shift will impact drivers heading east on Interstate 64 near Hampton Roads Center Parkway. The Virginia Department of Transportation (VDOT ...