نتایج جستجو برای: ph3p
تعداد نتایج: 104 فیلتر نتایج به سال:
Gold(I) Thiolates, (Benzylthiolato)gold(I) Complexes, Gold(I) Mercaptocarboxylates, Polynu clear Gold(I) Complexes In a search for air-stable and water-soluble mercapto compounds of gold with a high gold content, benzylthiol, a-mercapto-acetic acid, /3-mercapto-propionic acid, and thiosalicylic acid were converted into aurated sulfonium salts by treatment with reagents of the type [(R^PjAufiO*...
Oxo- and imido-vanadium(V) metal complexes supported by bis(phenolate)-functionalized N-heterocyclic carbene (NHC) ligands were synthesized structurally identified. In the presence of [(Ph3P)2N]Cl ([PPN]Cl), saturated NHC oxo-vanadium showed activity in coupling CO2 cyclohexene oxide (CHO) into cis-cyclohexene carbonate (cis-CHC). More importantly, complex bearing less electron-donating benzann...
Metalloenzymes preorganize the reaction environment to steer substrate(s) along the required reaction coordinate. Here, we show that phosphine ligands selectively facilitate protonation of binuclear silver hydride cations, [LAg2(H)](+) by optimizing the geometry of the active site. This is a key step in the selective, catalysed extrusion of carbon dioxide from formic acid, HO2CH, with important...
چکیده : این تحقیق به مطالعه تئوری واکنشهای توتومری (انتقال پروتون) مولکولهای اتیل 1-بنزوئیل-3-اکسو-2و3-دی هیدرو-1h پیرازول-5-کربوکسیلات و اتیل 6-هیدروکسی-3-فنیل پیریدازین-4-کربوکسیلات در حالت منومر ودر دو فاز گاز وحلال (دی کلرومتان) به وسیله محاسبات مکانیک کوانتومی به روش dft با استفاده از سری پایه ++g**311-6 می پردازد. دو مولکول فوق حاصل از دو مکانیسم پیشنهادی برای واکنش بنز هیدرازید با dmad...
Oxidative coupling of 2-aminopyrimidine with LiOCl produces 5-chloro-2,20-azobis(pyrimidine) and 2,20-azobis(5chloropyrimidine) (abcp), both of which were structurally characterized. The symmetrical abcp was used as strongly p-accepting monoand bis-chelate ligand in complexes with [(bpy)2Ru] 2þ, [(H6C6)ClRu] þ, [(Ph3P)2Cu] þ and (OC)3ClRe. The p-acceptor capability of abcp results in low-energy...
The reaction of K[AuCl4] with AgClO4 and iminophosphorane ligands (N,N-IM) Ph3P@NR [R = CH2-2NC5H4 (1), C(O)-2-NC5H4 (2)] or Ph2PyP@NR [Py = -2-NC5H4; R = Ph (3), C(O)Ph (4)] (mol ratio 1:2.2:1) in acetonitrile affords complexes [AuCl2(N,N-IM)]ClO4 (5–8). These compounds are airand moisture-stable and they have been evaluated in two types of catalytic processes. They have been found to be effec...
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