- Alkali metal-stabilized 1,3,5-triphenylbenzene monoanions: Synthesis and characterization of the lithium, sodium, and potassium complexes
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Alkali metal stabilized monoanions of 1,3,5-triphenylbenzene can be obtained by various reactions starting from the alkali metal. Reduction of the Grignard compound [{(2,4,6-Ph3-C6H2)Mg(dme)Br} 2(μ-O,O′-dme)] (3
- Krieck, Sven,Goerls, Helmar,Westerhausen, Matthias
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- Mechanistic elucidation of the formation of the inverse Ca(I) sandwich complex [(thf)3Ca(μ-C6H3-1,3,5-Ph 3)Ca(thf)3] and stability of aryl-substituted phenylcalcium complexes
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The formation of the stable inverse Ca(I) sandwich complex [(thf) 3Ca(μ-C6H3-1,3,5-Ph3)Ca(thf) 3] (1) has been investigated mechanistically by the reaction of bromo-2,4,6-triphenylbenzene with calcium
- Krieck, Sven,Goerls, Helmar,Westerhausen, Matthias
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- MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES
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The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.
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Page/Page column 97
(2021/04/02)
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- The AZARYPHOS family of ligands for ambifunctional catalysis: Syntheses and use in ruthenium-catalyzed anti-markovnikov hydration of terminal alkynes
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The family of AZARYPHOS (aza-aryl-phosphane) phosphane ligands, containing a phosphine unit and sterically shielded nitrogen lone pairs in the ligand periphery, is introduced as a tool for developing ambifunctional catalysis by the metal center and nitrogen lone pairs in the ligand sphere. General synthetic strategies have been developed to synthesize over 25 examples of structurally diverse (6-aryl-2pyridyl)phosphanes (ARPYPHOS), (6alkyl-2-pyridyl)phosphanes (ALPY-PHOS), 4,6-disubsituted l,3-diazin-2ylphosphanes or l,3,5-triazin-2- ylphosphanes, quinazolinylphosphanes, quinolinylphosphanes, and others. The scalable syntheses proceed in a few steps. The incorporation of AZARYPHOS ligands (L) into complexes [RuCp(L)2(MeCN)][PF6] (Cp = cyclopentadieny1)gives catalysts for the anti-Markovnikov hydration of terminal alkynes of the highest known activities. Electronic and steric ligand effects modulate the reaction kinetics over a range of two orders of magnitude. These results highlight the importance of using structurally diverse ligand families in the process of developing cooperative ambifunctional catalysis by a metal and its ligand.
- Hintermann, Lukas,Dang, Tuan Thanh,Labonne, Aurelie.,Kribber, Thomas,Xiao, Li,Naumov, Pance
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supporting information; experimental part
p. 7167 - 7179
(2010/02/28)
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- Stable "Inverse" sandwich complex with unprecedented organocalcium(I): Crystal structures of [(thf)Mg(Br)-CH-2,4,6-Ph] and [(thf)Ca{μ-CH-1,3,5-Ph}Ca(thf)]
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The reaction of bromo-2,4,6-triphenylbenzene with activated magnesium inTHF yielded the Grignard reagent [(thf)2Mg(Br)-C6 H 2-2,4,6-Ph3] (1) with a Mg-C bond length of 214.8(3) pm. A similar reaction of bromo-2,4,6-triphenylbenzene with activated calcium led to an "inverse" sandwich complex [(thf)3Ca{μ-C 6H3-1,3,5-Ph3}Ca(thf)3] (2) with the calcium atoms on opposite sides of the central arene ring showing small Ca-Ca and Ca-C distances of 427.9(3) and 259.2(3) pm. This extremely air- and moisture-sensitive complex exhibits thermochomic and solvatochromic behavior. It is paramagnetic with spin of S = 1 (triplet)with an ESR resonance at g = 2.0023. Quantum chemical calculations shed light on the bonding situation in this very unusual dinuclear Ca(I) com pound.
- Krieck, Sven,Goerls, Helmar,Yu, Lian,Reiher, Markus,Westerhausen, Matthias
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experimental part
p. 2977 - 2985
(2009/09/04)
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