Alpha-diimine

Keywords Alpha-diimine, Catalyst, Late transition metal, Nickel, Olefin, Palladium,... 

Camacho, R.L., E. Montiel, N. Jayanthi, T. Pandiyan, and J. Cruz, DFT studies of alpha-diimines adsorption over Fe-n surface (n = 1,4,9 and 14) as a model for metal surface coating. Chemical Physics Letters, 2010. 485(1-3) p. 142-151. 

Correia, S. G. Marques, M. M. Ascenso, J. R. Ribeiro, A. R G Gomes, P. T. Dias, A. R. Blais, M. Rausch, M. D. Chien, J. C. W. Polymerization with TMA protected polar vinyl copolymers. II. Catalyzed hy nickel complexes containing alpha-diimine type hgands. J. Polym. Set, Part A Polym. Chem. 1999, 37, 2471-2480. 

Scheme 37.1 Synthesis of nickel(II) compounds stabilized by alpha-diimine ligands.

Gates, D.P., Svejda, S.K., Onate, E., Killian, C.M., Johnson, L.K., White, P.S., Brookhart, M., Synthesis of branched polyethylene using (alpha-diimine) nickel (II) catalysts Influence of temperature, ethylene pressure, and ligand stracture on polymer properties. Macromolecules 2000, 33 2320-2334. 

Rossenaar BD, Stufkens DJ, Vlcek A Jr (1996) Halide-dependent change of the lowest-excited-state character from MLCT to XLCT for the complexes Re(X)(CO)3(alpha-diimine) (X = Cl, Br, I alpha-diimine equals bpy, iPr-PyCa, iPr-DAB) studied by resonance Raman, time-resolved absorption, and emission spectroscopy. Inorg Chem 35 2902-2909... 

Niewenhuis HA, Stufkens DJ, Oskam A (1994) Remarkable influence of X and R on the charge-transfer character (MLCT or XLCT) of the complexes [Ru(X)(R)(CO)2(L)] (X = halide, CF3SO3 R = alkyl L = alpha-diimine)-a UV-VIS absorption and resonance Raman study. Inorg Chem 33 3212-3217... 

Nijhoff J, Hartl F, Stufkens DJ et al (1999) Light-induced insertion of a CO ligand into an Os-N bond of the clusters Os3(CO)io(L), where L represents a potentially terdentate N, N -chelating alpha-diimine. Organometallics 18 4380-4389... 

Nijhoff J, Bakker MJ, Hartl F et al (1998) Photochemistry of the triangular clusters Os3(CO)io(alpha-diimine) Homolysis of an Os-Os bond and solvent dependent formation of biradicals and zwitterions. Inorg Chem 37 661-668... 

Vergeer FW, Kleverlaan CJ, Matousek P et al (2005) Redox control of light induced charge separation in a transition metal cluster photochemistry of a methyl viologen-substituted [Os3(CO)io(alpha-diimine)] cluster. Inorg Chem 44 1319-1331... 

Zalis S, Ben Amor N, Daniel C (2004) Infiuence of the halogen ligand on the near-UV-visible spectrum of Ru(X)(Me)(CO)2((alpha-diimine) (X=Ci, L alpha-diimine=Me-DAB, iPr-DAB DAB=l,4-diaza-l,3-butadiene)) an ab initio and TD-DFT analysis. Inorg Chem 43 7978-7985... 

Villaume S, Daniel C (2005) Emission spectroscopy of metal-to-ligand-charge-transfer states of HRe(CO)3(H-DAB), model system for alpha-diimine rhenium tricarbonyl complexes. Comptes Rendus Chimie 8 1453-1460... 

Alkenes and/or alkynes can be dimerized, telomerized, and polymerized under palladium-catalysis. In an effort to copolymerize polar co-monomers, Johnson et al. investigated catalysts based upon palladium. These catalysts were referred to as postmetallocene catalysts. They were based upon complexes bearing bulky, neutral, alpha-diimine (or diketimine) ligands. They have been commercialized as DuPont s Versipol olefin polymerization system. The commercial synthesis of 1-octene (starting in 2007) is a palladium-catalyzed telomerization of butadiene with methanol. ... 

Azoulay, J.D., Schneider, Y., Galland, G.B., and Bazan, G.C. (2009) Living polymerization of ethylene and alpha-olefins using a nickel a-keto-p-diimine initiator. Chemical Communications, 6177-6179. 

Olivier-Bourbigou Lecocq, 2003) Chloroaluminate ILs and Ni(COD)(2) with a Bronsted acid ILs Biphasic ethylene oligomerization or butene and higher olefins dimerization (Difasol process). These solvents stabilize and activate nickel catalysts, even without ligand, and greatly enhance the reaction activity. The presence of a diimine ligand allows the production of C4-C6 linear olefins with improved alpha-selectivities. 

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