Reaction of [Pd(PPh(3))(4)] with 1,1-dichloro-2,3-diarylcyclopropenes gives complexes of the type cis-[PdCl(2)(PPh(3))(C(3)(Ar)(2))] (Ar = Ph 5, Mes 6). Reaction of [Pd(dba)(2)] with 1,1-dichloro-2,3-diarylcyclopropenes in benzene gave the corresponding binuclear palladium complexes trans-[PdCl(2)(C(3)(Ar)(2))](2) (Ar = Ph 7, p-(OMe)C(6)H(4)8, p-(F)C(6)H(4)9). Alternatively, when the reactions ...

Relations introduced by Conrad, Drazin, Hartwig, Mitsch and Nambooripad are discussed on general, regular, completely semisimple and completely regular semigroups. Special properties of these relations as well as possible coincidence of some of them are investigated in some detail. The properties considered are mainly those of being a partial order or compatibility with multiplication. Coincide...

3,7-Diaminophenothiazine derivatives are readily synthesized via two-fold Buchwald-Hartwig coupling of 10-hexyl 3,7-dibromo-10H-phenothiazine with a series of primary and secondary anilines and amines. All derivatives possess two reversible oxidations at low potentials with remarkable semiquinone formation constants. The electronic structure of this novel class of phenothiazinyl-oligoanilines i...

This paper focuses on the case where σ has the simplest Fisher-Hartwig singularity, one double zero. The method of [6] gives a first-order asymptotic result for the inverse. More recently Rambour and Seghier [5] found analogous and sharper results for the Toeplitz analogue. Neither of these serves our present purpose, which is to find a formula that holds uniformly throughout (0, α) with very s...