2005
DOI: 10.1021/om049075s
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3-Aminoiminoacrylate, 3-Aminoacrylate, and 3-Amidoiminomalonate Complexes as Catalysts for the Dimerization of Olefins

Abstract: Nickel(II)−aminoacrylate, −aminoiminoacrylate, and −amidoiminomalonate complexes 1−4 are suitable precursors together with appropriate cocatalysts for the catalytic dimerization of ethylene, propylene, and α-olefins with short chain lengths such as 1-hexene. Suitable ligands IV−VI, VIII, X, and XII generate nickel(II) compounds 1−4 active for these catalytic dimerizations. The influence of different substituents attached to the coordinating ligand backbone is tested in the catalytic reactions. Several novel mo… Show more

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Cited by 41 publications
(28 citation statements)
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“…Interestingly, some nickel complexes of similar ligands had only this cyano-metal coordination and did not form the expected N,N-chelate. [29] The central zinc atom of the Zn 7 unit shows an distorted octahedral environment as it is coordinated to the two central O atoms of the tetrahedron plus to four oxygen atoms forming acetate bridges to the four Zn atoms which are not bound to the N atom of the ligands. Since the whole second part is linked to two ligands via the cyano group and the two respective zinc atoms, the whole structure forms a polymeric band.…”
Section: E) Selected Distances (å) and Angles (Deg) Not Shown Inmentioning
confidence: 99%
“…Interestingly, some nickel complexes of similar ligands had only this cyano-metal coordination and did not form the expected N,N-chelate. [29] The central zinc atom of the Zn 7 unit shows an distorted octahedral environment as it is coordinated to the two central O atoms of the tetrahedron plus to four oxygen atoms forming acetate bridges to the four Zn atoms which are not bound to the N atom of the ligands. Since the whole second part is linked to two ligands via the cyano group and the two respective zinc atoms, the whole structure forms a polymeric band.…”
Section: E) Selected Distances (å) and Angles (Deg) Not Shown Inmentioning
confidence: 99%
“…[M{S 2 P(OEt) 2 } 2 (Py-indz)] M = Zn (8), Cd (9) have pentacoordinate and hexacoordinate structures, respectively. Octahedral tin complexes [SnL 4 (Py-indz)] L 4 = I 4 (10), Cl 3 Ph (11), and Cl 2 nBu 2 (12) have different behaviors in solution; whereas complex 10 is practically insoluble, complex 11 displays the expected pattern in its NMR spectrum, and complex 12 shows dynamic behavior. The Py-indz ligand is also able to stabilize copper(I) and forms [Cu(PPh 3 ) 2 (Py-indz)]BF 4 (13).…”
Section: Introductionmentioning
confidence: 99%
“…[9] Shortly after the publication of our work in the preparation of Py-indz mediated by manganese, the preparation of substituted 1-pyridineimidazo[1,5-a]pyridine ligands was reported. [10] There are only a few examples of the use of 3-(pyridin-2-yl)imidazo[1,5-a]pyridines as ligands in Cu II , [11] Ni II , [12] V V , [13] Ir III , [14] and Re I complexes, [15] or analogues of Cd II , [16] to prepare boron complexes [17] or involved in a catalytic process to synthesize N-heterocycles. [18] Some related derivatives of 3-(pyridin-2-yl)imidazo[1,2-a]pyridine have been used in situ to regulate the metal-induced aggregation of amyloid-β.…”
Section: Introductionmentioning
confidence: 99%
“…Besides these reactions, pereparation of imidazo [1,5-a] pyridines from 2-pyridylalkylamines with α,β-unsuturated compounds [18], and/or aldehydes [19] have been reported. Other approaches include the use of imine derivatives [20], 2-cyanopyridine [21] and benzotriazoles [22].…”
Section: Introductionmentioning
confidence: 99%