153625-67-3Relevant academic research and scientific papers
Addition of phenylacetylene to a magnesium complex of monoiminoacenaphtheneone (dpp-mian)
Razborov,Lukoyanov,Baranov,Fedushkin
, p. 20532 - 20541 (2015)
In the presence of formic acid, acenaphthenequinone (AQ) reacts with one molar equivalent of 2,6-diisopropylaniline in toluene to give monoiminoacenaphtheneone (3, dpp-mian) in good yield. Reduction of compound 3 with an excess of magnesium in thf results in green crystalline amido-alcoholate [(dpp-mian)Mg(thf)2]2 (4). Crystallization of complex 4 from toluene affords a blue tetramer [(dpp-mian)Mg(thf)]4 (5). Reactions of compounds 4 and 5 with phenylacetylene proceed with C-C bond formation between the alkyne and the dpp-mian ligand to give the monomeric alkynyl-magnesium derivative [(dpp-mian)(PhCCH2)Mg(CCPh)2(thf)]2 (7). Hydrolysis of complex 5 gives metal-free dpp-mian(PhCCH2)H (8). Reaction of 7 with acetylacetone yields [{dpp-mian(PhCCH2)}Mg(acac)]2 (9). Compounds 3-5 and 7-9 have been characterized by IR and NMR spectroscopy; molecular structures of 3, 5, 7, 8 and 9 have been determined by single crystal X-ray analysis.
Gallium Hydrides with a Radical-Anionic Ligand
Sokolov, Vladimir G.,Koptseva, Tatyana S.,Moskalev, Mikhail V.,Bazyakina, Natalia L.,Piskunov, Alexander V.,Cherkasov, Anton V.,Fedushkin, Igor L.
, p. 13401 - 13410 (2017)
The reaction of Cl2GaH with a sodium salt of the dpp-Bian radical-anion (dpp-Bian?-)Na (dpp-Bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) affords paramagnetic gallane (dpp-Bian?-)Ga(Cl)H (1). Oxidation of (dpp-Bian2-)Ga-Ga(dpp-Bian2-) (2) with N2O results in the dimeric oxide (dpp-Bian?-)Ga(μ2-O)2Ga(dpp-Bian?-) (3). A treatment of the oxide 3 with phenylsilane affords paramagnetic gallium hydrides (dpp-Bian?-)GaH2 (4) and (dpp-Bian?-)Ga{OSi(Ph)H2}H (5) depending on the reagent's stoichiometry. The reaction of digallane 2 with benzaldehyde produces pinacolate (dpp-Bian?-)Ga(O2C2H2Ph2) (6). In the presence of PhSiH3, the reaction between digallane 2 and benzaldehyde (2: PhSiH3: PhC(H)O = 1:4:4) affords compound 4. The newly prepared complexes 1, 3-6 consist of a spin-labeled diimine ligand-dpp-Bian radical-anion. The presence of the ligand-localized unpaired electron allows the use of the ESR spectroscopy for characterization of the gallium hydrides reported. The molecular structures of compounds 1, 3-6 have been determined by the single-crystal X-ray analysis.
Aryl-substituted BIAN complexes of iron dibromide: Synthesis, X-ray and electronic structure, and catalytic hydrosilylation activity
Supej, Michael J.,Volkov, Alexander,Darko, Louisa,West, Ryan A.,Darmon, Jonathan M.,Schulz, Charles E.,Wheeler, Kraig A.,Hoyt, Helen M.
, p. 403 - 414 (2016)
Anhydrous iron dibromide complexes bearing bidentate α-diimine ligands ArN=C(Me)-(Me)C=NAr and ArBIAN (BIAN = bis(imino)acenaphthene; Ar = dpp and Mes; dpp = 2,6-diisopropylphenyl; Mes = 2,4,6-trimethylphenyl) have been pr
Transition metal 1,3,2-diazagallol derivatives
Fedushkin,Sokolov,Makarov,Cherkasov,Abakumov
, p. 1495 - 1504 (2016)
Reduction of digallane (dpp-bian)Ga—Ga(dpp-bian) (1) (dpp-bian is the 1,2-bis[(2,6-di-isopropylphenyl)imino]acenaphthene dianion) with metallic sodium in THF leads to the formation of gallylsodium (dpp-bian)Ga—Na(thf)4 (2). Reduction of digallane 1 with dicyclopentadienyltetracarbonyldiiron, vanadocene, and nickelocene furnishes the corresponding gallyl complexes (dpp-bian)Ga—FeCp(CO)2 (3), (dpp-bian)Ga—VCp2 (4) and [(dpp-bian)Ga]2NiCp (5). The reaction of 1 with Cp2Mn gives a gallium-free complex (dpp-bian)MnCp(dme) (6). Carbonylates [{(dpp-bian)Ga—M(CO)5}{Na(thf)2}]2 (M = Cr (7), W (8)) and [{(dppbian)Ga}2FeCp(CO)][Na(dme)3] (9) were obtained by the reaction of carbonyls Cr(CO)6, W(CO)6, and [CpFe(CO)2]2 with compound 2. Diamagnetic derivatives 3, 7, 8, and 9 were characterized by 1H NMR spectra. The structures of products 3—9 were established by single crystal X-ray diffraction.
Aluminum hydrides with radical-anionic and dianionic acenaphthene-1,2-diimine ligands
Sokolov,Koptseva,Moskalev,Piskunov,Samsonov,Fedushkin
, (2017)
The reaction of 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-bian) with LiAlH4 affords two products regardless of the solvent used (tetrahydrofuran or diethyl ether). These products were isolated as green and colorless crystals. Green
Mono- and binuclear nickel catalysts for 1-hexene polymerization
Dechal, Abbas,Khoshsefat, Mostafa,Ahmadjo, Saeid,Mortazavi, Seyed Mohammad Mahdi,Zohuri, Gholam Hossein,Abedini, Hossein
, (2018)
Polymerization of 1-hexene was carried out using a mononuclear (MN) catalyst and two binuclear (BN1 and BN2) α-diimine Ni-based catalysts synthesized under controlled conditions. Ethylaluminium sesquichloride (EASC) was used as an ef
Reactions of [(dpp-Bian)Ln(dme)2] (Ln = Eu, Yb) with some oxidants
Klementyeva, Svetlana V.,Starikova, Alyona A.,Abramov, Pavel A.
, p. 40 - 45 (2018)
Europium and ytterbium complexes [(dpp-Bian)Ln(dme)2] (Ln = Eu (1), Yb(2), dme = 1,2-dimethoxyethane) with redox-active dianionic 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene ligand (dpp-Bian) have been tested in the reactions with nitrous oxide and sulfur. The reactions performed in 1:1 M ratio afford quantitatively neutral dpp-Bian, while the use of a half equivalent of oxidants leads to the europium complex with two radical-anionic dpp-Bian ligands [(dpp-Bian)2Eu(dme)] (3) and the known ytterbium ionic compound [(dpp-Bian)2Yb]?[(dpp-Bian)Yb(dme)2]+ (4). The same products have been produced by the treatment of 1 and 2 with dpp-Bian. The oxidation of 1 and 2 with either sulfur dioxide or sulfur diimide (Me3SiN=)2S proceeds with the total release of the neutral dpp-Bian. DFT calculations performed for 1 and 2 show pure ligand nature of the frontier molecular orbitals in both cases.
Adaptive behavior of a redox-active gallium carbenoid in complexes with molybdenum
Fedushkin, Igor L.,Sokolov, Vladimir G.,Piskunov, Alexander V.,Makarov, Valentine M.,Baranov, Eugeny V.,Abakumov, Gleb A.
, p. 10108 - 10111 (2014)
A gallium(i) carbenoid derived from redox-active diimine 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-bian) in complexes with molybdenum may serve either as a neutral [(dpp-bian)Ga:] or an anionic [(dpp-bian)Ga:]- two-electron donor depending on the electronic state of the transition metal. This journal is the Partner Organisations 2014.
Ca(ii), Yb(ii) and Tm(iii) complexes with tri- and tetra-anions of 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene
Fedushkin, Igor L.,Lukina, Daria A.,Skatova, Alexandra A.,Lukoyanov, Anton N.,Cherkasov, Anton V.
, p. 12950 - 12953 (2018)
Reduction of [(dpp-bian)2?M2+(thf)4] (M = Ca, 1; Yb, 6; dpp-bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) by alkali metals results in heterometallic, [(dpp-bian)3?M2+K+(thf)2]2 (M = Ca, 2; Yb, 7), [(dpp-bian)4?Ca2+A2+(thf)4]2 (A = Na, 3; Li, 4; K, 5), [(dpp-bian)4?Yb2+K2+(thf)4]2 (8) and [(dpp-bian)24?Yb32+K2+(thf)8] (9). The reduction of [(dpp-bian)TmBr(thf)n] (in situ) affords [(dpp-bian)4?Tm3+Na+(thf)]2 (10).
Chain-Walking Polymerization of Linear Internal Octenes Catalyzed by α-Diimine Nickel Complexes
Wang, Fuzhou,Tanaka, Ryo,Li, Qingshan,Nakayama, Yuushou,Shiono, Takeshi
, p. 1358 - 1367 (2018)
The chain-walking polymerization of linear internal alkenes (i.e., trans-2-, 3-, and 4-octenes) using α-diimine nickel catalysts activated with modified methylaluminoxane (MMAO) was studied in comparison with the corresponding terminal alkene polymerization. The rates of polymerization were found to decrease in the following order: 1-octene > 4-octene ≥ 2-octene ≥ 3-octene. The obtained branched poly(2-octene)s and poly(4-octene)s with high molecular weight and Mw/Mn less than 2 were amorphous polymers with low glass transition temperature (Tg) of approximately -66 °C. At 0 °C, 4-octene polymerized in a living/controlled manner. The NMR analyses of the polymers showed that the chain-walking polymerization of 4-octene gave periodically branched polymers with the constant branching density, while that of 2-octene gave the polymer possessing fewer branches than the expected value due to monomer-isomerization. The (n+2),(n+3)- and (n+3),(n+2)-insertions of the internal (n+2)-alkene [CH3(CH2)nCH=CH(CH2)mCH3] followed by chain-walking were confirmed by the 13C NMR analysis of the produced polymers.
