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Growth of hexagonal polyaniline fibers with polyacrylamide pendants

14-09-2013 | Xiaoxu Chen, Hongyuan Cai, Qunwei Tang, Danwei Liang, Min Wang, Benlin He, Polymer Composites, 2013

A new concept of synthesizing hexagonal polyaniline (PANi) fibers with polyacrylamide (PAAm) pendants in PAAm oligomer (oligo‐PAAm) colloid is proposed. The size and morphology of the composite fibers can be controlled by adjusting the synthesis conditions. A possible growth mechanism of the ...


Water-Soluble-Phosphines-Assisted Cobalt Separation in Cobalt-Catalyzed Hydroformylation

13-09-2013 | László T. Mika; László Orha; Eddie van Driessche; Ron Garton; Katalin Zih-Perényi; István T. Horváth, Organometallics, 2013

The hydroformylation of octene-1 and the removal of Co2(CO)8 and HCo(CO)4 from the reaction products including commercial C9 OXO-product were studied under biphasic conditions using an aqueous solution of different electron-donating sulfonated phosphine RnP(C6H4-m-SO3Na)2 (n = 0, 1, 2; R = Me, ...


Tetrahedral [HnPt4(CO)4(P∧P)2]n+ (n = 1, 2; P∧P = CH2═C(PPh2)2) Cationic Mono- and Dihydrido Carbonyl Clusters Obtained by Protonation of the Neutral Pt4(CO)4(P∧P)2

11-09-2013 | Iacopo Ciabatti; Cristina Femoni; Maria Carmela Iapalucci; Giuliano Longoni; Stefano Zacchini, Organometallics, 2013

The reaction of [Pt12(CO)24]2– with CH2═C(PPh2)2 (P∧P) results in the neutral tetrahedral cluster Pt4(CO)4(P∧P)2. This reacts with strong acids such as HBF4 to afford, first, the [HPt4(CO)4(P∧P)2]+ monohydride monocation and, then, the [H2Pt4(CO)4(P∧P)2]2+ dihydride dication. The three clusters ...


Zinc(II) and Cadmium(II) Monohydroxide Bridged, Dinuclear Metallacycles: A Unique Case of Concerted Double Berry Pseudorotation

09-09-2013 | Daniel L. Reger; Andrea E. Pascui; Perry J. Pellechia; Mark D. Smith, Inorganic Chemistry, 2013

The reactions of M(ClO4)2·6H2O [M = Zn(II), Cd(II)] and the ligands m-bis[bis(1-pyrazolyl)methyl]benzene, Lm, or m-bis[bis(3,5-dimethyl-1-pyrazolyl)methyl]benzene, Lm*, in the presence of a base yield the hydroxide bridged dinuclear metallacycles [M2(μ-OH)(μ-L)2](ClO4)3, L = Lm, M = Zn(II) (1); L ...


Group 12 Metal Complexes of N-Heterocyclic Ditopic Carbanionic Carbenes

09-09-2013 | Jordan B. Waters; Robert S. P. Turbervill; Jose M. Goicoechea, Organometallics, 2013

Reaction of the N-heterocyclic carbene 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) with M(mes)2 (M = Zn, Cd) in diethyl ether afforded the Lewis acid–base adducts [M(IPr)(mes)2] (M = Zn (1), Cd (2)) in quantitative yields. An analogous reaction between Hg(mes)2 and IPr failed to form ...


Neutral Six-Coordinate and Cationic Five-Coordinate Silicon(IV) Complexes with Two Bidentate Monoanionic N,S-Pyridine-2-thiolato(−) Ligands

06-09-2013 | Johannes A. Baus; Christian Burschka; Rüdiger Bertermann; Célia Fonseca Guerra; F. Matthias Bickelhaupt; Reinhold Tacke, Inorganic Chemistry, 2013

A series of neutral six-coordinate silicon(IV) complexes (4–11) with two bidentate monoanionic N,S-pyridine-2-thiolato ligands and two monodentate ligands R1 and R2 was synthesized (4, R1 = R2 = Cl; 5, R1 = Ph, R2 = Cl; 6, R1 = Ph, R2 = F; 7, R1 = Ph, R2 = Br; 8, R1 = Ph, R2 = N3; 9, R1 = Ph, R2 ...


Synthesis and Characterization of Thorium(IV) and Uranium(IV) Corrole Complexes

04-09-2013 | Ashleigh L. Ward; Heather L. Buckley; Wayne W. Lukens; John Arnold, Journal of the American Chemical Society, 2013

The first examples of actinide complexes incorporating corrole ligands are presented. Thorium(IV) and uranium(IV) macrocycles of Mes2(p-OMePh)corrole were synthesized via salt metathesis with the corresponding lithium corrole in remarkably high yields (93% and 83%, respectively). Characterization ...


Predicting the Stability Constants of Metal-Ion Complexes from First Principles

03-09-2013 | Ondrej Gutten; Lubomír Rulíšek, Inorganic Chemistry, 2013

The most important experimental quantity describing the thermodynamics of metal-ion binding with various (in)organic ligands, or biomolecules, is the stability constant of the complex (β). In principle, it can be calculated as the free-energy change associated with the metal-ion complexation, ...


Directed ortho-Lithiation: Observation of an Unexpected 1-Lithio to 3-Lithio Conversion of 1-Lithio-naphthyllithium Compounds with an ortho-Directing 2-(Dimethylamino)methyl Group

03-09-2013 | Johann T. B. H. Jastrzebski; Anne M. Arink; Henk Kleijn; Thijs W. Braam; Martin Lutz; Anthony L. Spek; Gerard van Koten, Journal of the American Chemical Society, 2013

Regioselectivity is an important aspect in the design of organic protocols involving Directed ortho-Lithiation (DoL) of arenes, in particular with those arenes containing heteroatom substituents as directing groups. The DoL of 2-[(dimethylamino)methyl]naphthalene (dman) that proceeds with low ...


Towards the Design of Highly Luminescent Europium(III) Complexes

02-09-2013 | Moema B. S. Botelho, Maria D. Gálvez‐López, Luisa De Cola, Rodrigo Q. Albuquerque, Andrea S. S. de Camargo, European Journal of Inorganic Chemistry, 2013

Abstract We report on the synthesis, characterization, and photophysical investigation of a new nine‐coordinate Eu3+ complex containing three tridentate ligands and exhibiting one of the highest emission quantum yields (Φ = 85 %) so far reported in solution. Ligand field theory (LFT) and ...


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