نتایج جستجو برای: pdii complex

تعداد نتایج: 783923  

2016
Aaron C. Sather Stephen L. Buchwald

Aromatic fluorides are prevalent in both agrochemical and pharmaceutical agents. However, methods for their rapid and general preparation from widely available starting materials are limited. Traditional approaches such as the Balz-Schiemann and Halex reactions require harsh conditions that limit functional group tolerance and substrate scope. The use of transition metals to affect C-F bond for...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت معلم تهران - دانشکده علوم 1370

determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...

Journal: :Acta Crystallographica Section A Foundations and Advances 2017

Journal: :Lentera Pustaka: Jurnal Kajian Ilmu Perpustakaan, Informasi dan Kearsipan 2017

Journal: :Catalysts 2023

The detection of dissolved gas in transformer oil is vital importance to diagnose the early fault and monitor security stability power systems. In this work, distinct Pd/C, Pd/C-R Pd/NC were synthesized evaluated. XRD XPS characterizations show that both Pd0 PdII are presented over surface carbon host for while poor gas-sensitive properties H2-reduced sample. High content cationic species by ni...

2010
Anny Jutand Julien Pytkowicz Sylvain Roland Pierre Mangeney

Bis-N-heterocyclic carbenes Pd0 complexes, Pd(NHC)2, are efficient catalysts in Heck reactions performed with aryl bromides or chlorides. The Pd(NHC)2 that are not stable are generated in situ from PdII precursors PdY2(NHC)2 (Y = halides) after a chemical reduction. The latter procedure can be mimicked by an electrochemical reduction. The transient Pd(NHCBn)2 is generated by electrochemical red...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید