نتایج جستجو برای: pdcl2
تعداد نتایج: 260 فیلتر نتایج به سال:
کمپلکسهای فلزات واسطه فسفینی به دلیل کاربرد بالقوهشان در تهیه ترکیبات آلی، کاتالیست ها، طراحی داروهای جدید ضد تومور و ضدویروسی و ضد باکتریایی در سال های اخیر توجهات زیادی را به خود جلب کرده اند. در این پژوهش، دو ایلید نامتقارن با فرمول عمومی (n = 1 (Y1), 2 (Y2)) [Ph2P(CH2)nPPh2CHC(O)C6H4(m-NO2)] به ترتیب از واکنش 2-برومو3-نیترو استوفنون با 1و2-بیس(دیفنیلفسفینو)متان (dppm) و 1و2-بیس(دیفنیل...
A study on room temperature Suzuki cross-coupling in an aqueous medium was carried out using a simple hydrophilic palladium (II) complex, trans-PdCl2(NH2CH2COOH)2 as catalyst in the presence of K2CO3 in air. This approach with a comparatively inexpensive and hydrophilic catalyst, mild reaction condition and aqueous media exhibits excellent catalytic activity towards the Suzuki coupling of aryl ...
In the context of palladium-catalyzed guanylation of anilines herein, we have been able to characterize and isolate bis(anilino) and bis(guanidino)Pd(II) complexes using reaction conditions under which stoichiometric amounts of palladium salts are used. Characterization of these palladium complexes strongly supports a mechanistic proposal for the catalytic guanylation of anilines using PdCl2(NC...
Stoichiometric-deficient lithiation of (2,6-diisopropylphenyl)(4-methylpyridin-2-yl)amine and reaction with [(cod)PdCl2] (cod = 1,5-cyclooctadiene) yield a dimeric Pd complex. X-ray structural analysis of this complex reveals a very short Pd-Pd distance (2.429 A). Topological analysis of the electron density and the electron localization function from scalar relativistic density functional theo...
در این پروژه ابتدا فسفین لیگاند: بنزیل ]2-(دی فنیل فسفینو) اتیل[ دی فنیل فسفونیوم بروماید [ph2pch2ch2p(ch2ph)ph][br] تهیه و سپس کمپلکس های پلاتین و پالادیوم فسفینی با فرمول های شیمیایی،[pdcl2([ph2pch2ch2p(ch2ph)ph][br])2]و[ptcl2([ph2pch2ch2p(ch2ph)ph][br])2] سنتز شدند. فسفین لیگاند [ph2pch2ch2p(ch2ph)ph][br] از واکنش 1و2-بیس (دی فنیل فسفینو)اتان [ph2pch2ch2pph2] و بنزیل برماید (phch2br) تهیه ش...
The preparation of palladium(II) complexes of 3,5-diacyl-1,2,4-triazole bis(thiosemicarbazone) (H2L2), 2,6-diacylpyridine bis(thiosemicarbazone) (H2L3) and benzyl bis(thiosemicarbazone) (H2L4) is described. The new complexes [PdCl2(H2L2)] (1), [PdCl2(H2L3)] (2) and [PdL4].DMF (3) have been characterized by elemental analyses and spectroscopic studies (IR, 1H NMR and UV-Vis). The crystal and mol...
We present an original two-step method for the deposition via precipitation of Pd nanoparticles into macroporous silicon. The method consists in immersing a macroporous silicon sample in a PdCl2/DMSO solution and then in annealing the sample at a high temperature. The impact of composition and concentration of the solution and annealing time on the nanoparticle characteristics is investigated. ...
The dichotomy between metal–organic frameworks (MOFs) and cages (MOCs) opens up the research spectrum of two fields which, despite having similarities, both have their advantages disadvantages. Due to fact that they cavities inside, also applicability in porosity sector. Bloch coworkers within this evolution from MOFs MOCs manage describe a MOC with structure Cu2 paddlewheel Cu4L4 (L = bis(pyra...
The thermal stabilization characteristics of mercury species (inorganic and organic) in the presence of different chemical modifiers, including PdCl2 + ascorbic acid, (NH4)2PdCl6 + citric acid, (NH4)3RhCl6 + citric acid and a mixture of the last two salts, were investigated. The results indicate that PdCl2 + ascorbic acid can stabilize mercury species upto a temperature of 5008C whereas, with t...
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