نتایج جستجو برای: برهمکنشهای c hπ و au clπ

تعداد نتایج: 1870407  

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1391

در کربن تتری، حمله نوکلئوفیلی آلکن معلق به آلکین کئوردینه شده به aupl+3 منجر به تشکیل حد واسط دو حلقه ای c می شود. در تأیید این نتایج مطالعات نظری دیگر نیز نشان دادند که حد واسط های دو حلقه ای به آسانی از 1 و 5 انین ها ایجاد می شوند. نکته قابل توجه این است که c از طریق مکانیسم جریان الکترون و با عبور از حالت گذار می تواند به کمپلکس آلن- au(i) تبدیل شود. در نتیجه تنها یک حد واسط خاص در ایزومریزا...

Hamed Barabadi, Soheila Honary,

Biofabrication by using fungi is an exciting recent interest to develop an eco-friendly production of metallic nanoparticles (NPs) for pharmaceutical applications. This study aimed to synthesize and characterize gold (Au) and silver (Ag) NPs by using Penicillium simplisimum. The fungus was grown in fluid czapek dox broth on shaker at 28 ºC and 200 rpm for ten days. Then the supernatant was...

Objective: With the increasing incidence of cancer and the dramatic effect of early detection on treatment and increase patient's life, many efforts have been devoted to making sensitive diagnosis systems. DNA as a biomarker for diagnosis of different types of cancers at the early stages of illness has attracted much attention.Methods: In this research novel electrochemical biosensor was ...

1997
Frank Würthwein

Using 3.3 Million BB̄ pairs accumulated with the CLEO detector we have measured B(B → Kπ) = (1.5 −0.4 ± 0.1± 0.1)× 10, B(B → Kπ) = (2.3 −1.0 ± 0.2± 0.2)× 10, and B(B → η′K+) = (7.8 −2.2±1.0)×10. These constitute the first observations of exclusive B decays to charmless hadronic final states. Furthermore, a measurement of B(B → hπ) = (1.6 +0.3 −0.5 −0.2 ± 0.1) × 10, as well as upper limits on var...

2009
Primjira P. Tadbuppa Edward R. T. Tiekink

In the title compound, [Au(C(5)H(10)NOS)(C(21)H(21)P)], two independent mol-ecules comprise the asymmetric unit, and these are connected by an aurophilic inter-action [Au⋯Au = 3.1351 (3) Å]. Each Au(I) atom is linearly coordinated within a S,P-donor set with the distortion from ideal linear geometry [S-Au-P = 175.31 (5) and 176.45 (5)°] ascribed to an intra-molecular Au⋯O contact in each case [...

2017
Isabelle Chambrier Dragoş-Adrian Roşca Julio Fernandez-Cestau David L. Hughes Peter H. M. Budzelaar Manfred Bochmann

The gold(III) methoxide complex (C∧N∧C)AuOMe (1) reacts with tris(p-tolyl)phosphine in benzene at room temperature under O abstraction to give the methylgold product (C∧N∧C)AuMe (2) together with O=P(p-tol)3 ((C∧N∧C) = [2,6-(C6H3t Bu-4)2pyridine]2-). Calculations show that this reaction is energetically favorable (ΔG = -32.3 kcal mol-1). The side products in this reaction, the Au(II) complex [A...

Journal: :Dalton transactions 2013
R Vilma Bojan Rafal Czerwieniec Antonio Laguna Tania Lasanta José M López-de-Luzuriaga Miguel Monge M Elena Olmos Harmut Yersin

Complex [Au{4-C(6)F(4)(4-C(6)BrF(4))}(tht)] reacts with diphosphines (L-L) such as bis(diphenylphosphino)methane (dppm) or 1,2-bis(diphenylphosphino)benzene (dppb) in a 2 : 1 molar ratio in dichloromethane, leading to neutral products of stoichiometry [(Au{4-C(6)F(4)(4-C(6)BrF(4))})(2)(μ-L-L)] (L-L = dppm (1), dppb (2)). In the crystal structure of complex 2 short Au···Au interactions of 2.9367...

2010
Sicelo V. Sithole Richard J. Staples Werner E. van Zyl

The title complex, [Au(2)Cl(2)(C(26)H(21)NP(2))], has an intra-molecular Au⋯Au inter-action of 3.1669 (4) Å, but no inter-molecular Au⋯Au inter-actions in the solid state. The Cl-Au-P bond angle of 176.84 (7)° is slightly distorted from linearity. The P-C bond length to the phenyl group is shorter [1.810 (7) Å] than the P-C bond length [1.876 (7) Å] to the bridging carbon, indicative of the fle...

2003
Kai-Ming G. Fu Taylor A. Johnston Ankoor S. Shah Lori Arnold John Smiley Troy A. Hackett Preston E. Garraghty Charles E. Schroeder

Kai-Ming G. Fu,1,2 Taylor A. Johnston,1,2 Ankoor S. Shah,1,2 Lori Arnold,3 John Smiley,2 Troy A. Hackett,4 Preston E. Garraghty,3 and Charles E. Schroeder1,2 1Albert Einstein College of Medicine, Bronx, New York 10461, 2Nathan Kline Institute, Orangeburg, New York 10962, 3Department of Psychology, Program in Neural Science, Indiana University, Bloomington, Indiana 47405, and 4Vanderbilt Univers...

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