- H2O/Triton X-100 Solvent Effect in the Micellar Catalysis of the Aquation of Tris-(3,4,7,8-tetramethyl-1,10-phenantroline)iron(II)
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The effect of triton X-100 micelles on the aquation of Fe(Me4phen)32+ has been investigated with triton X-100 as solvent.In liquid triton X-100, over a range of T (0.2-2.0 mol dm-3), significant rate enhancement factors of 35-140 are observed.Acid inhibits the rate of aquation at fixed T.A mechanism based on effective solvent participation in a chemical environment similar to that in reversed micelles is proposed in liquid triton X-100 with dispersed water pockets.This mechanism predicts direct H2O substitutions into the coordination sphere of Fe(Me4Phen)32+ in the highly polar water pockets or cavities where the FeII complex molecules are solubilized.Changes in the tumbling rate, mobility, structure, nucleophilicity and activity of water are suggested to account for the observed changes in the rate of aquation as a function of T, in the peculiar chemical environment of the water pockets.All kψ-T profiles are structured and exhibit maxima with kψ(max) shifted to progressively higher T as the fixed concentration of +>T is increased.
- Ige, Jide,Lambi, John N.,Soriyan, Oladega O.
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- Production method of a cross-coupling compound from an alkyl halide and an organoboron compound
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There is provided a method for producing a coupling compound of formula (1):(Y-)(n-1)R1-R2-(R1)(n'-1) wherein R1, R2 n and n' are as defined below, Y is R2 or X as defined below, which method comprises reactinganorganichalogen compound of formula (2):n' (R1X1n) wherein X1 represents a bromine or iodine, R1 represents a substituted or unsubstituted, linear, branched or cyclic hydrocarbon group of which α and β carbon atoms in relation to X1 are sp3 carbon atoms, n and n' each independently represent an integer of 1 or 2, and provided that n and n' do not simultaneously represent 2, with an organic boron compound of formula (3):m{R2(BX22)n'} wherein R2 represents a substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl or substituted or unsubstituted alkenyl group and the boron atom is bonded with an sp2 carbon atom thereof, X2 represents a hydroxyl or alkoxy group, n' is as defined above, m represents an integer of 1 or 2, and m is not more than n, in the presence of a catalyst comprising a) a nickel compound, and ???b) b-1) a compound of formula (i): ???or ???b-2) a compound of formula (ii):
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- A Simple Synthesis of Some 1,10-Phenanthrolines
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The reaction of o-phenylenediamine with α,β-unsaturated ketones in the presence of hydrochloric acid smoothly affords alkyl substituted 1,10-phenanthrolines in a one step synthesis.
- Butt, Graeme,Topsom, Ronald D.
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p. 641 - 642
(2007/10/02)
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