Synthesis, structure and coordination chemistry of mono- and bis-heterocyclic-ferrocenyl derivatives
摘要:
The heterocyclic-ferrocenyl derivatives, 1,1'-bis(5-phenanthridine)ferrocene (1) and [Pd{(eta(5)-C5H5)Fe(eta(5)-C5H3(phenanthroline))Cl] (2), have been prepared and characterised by single-crystal X-ray analyses. These confirm that in 1 the substitution at the heterocycle is ortho to the nitrogen atom of the phenanthridine while for 2 artho-metallation of the ferrocenyl group is observed in addition to chelation of the Pd(II) by the phenanthroline moiety. (C) 2000 Elsevier Science S.A. All rights reserved.
Redox-dependent self-sorting toggles a rotary nanoswitch
作者:Michael Schmittel、Soumen De、Susnata Pramanik
DOI:10.1039/c5ob01041a
日期:——
oxidation/reduction. In state I, the arm is attached via Cu+ complexation to a stericallyencumbered phenanthroline and in state II to a zinc porphyrin station. Toggling is realised by charging and discharging an external input signal, the ferrocene-appended diimine ligand 2. Addition of 2 leads to formation of the intermolecular complex [Cu(1)(2)]+ paralleled by a move of the py–pym arm to the zinc
The synthesis of the 2-ferrocenyl-1,10-phenanthroline ligand 1 has been improved, and its reactivity toward palladium is described. This study allows evidencing that 1 can coordinate to the metal center in an N−N bidentate fashion or undergo ortho metalation, thus acting as a terdentate N−N−C pincer ligand. Examples of the former coordination mode include complexes [Pd(Cl)(Me)(1)] (2) and [Pd(Me)(NCMe)(1)][PF6]
Asymmetric cyclopalladation of 6-ferrocenyl-2,2′-bipyridine and 2-ferrocenyl-1,10-phenanthroline
作者:L. A. Bulygina、V. I. Sokolov、I. A. Utepova、V. L. Rusinov、O. N. Chupakhin
DOI:10.1007/s11172-007-0160-7
日期:2007.5
Cyclopalladation of 6-ferrocenyl-2,2′-bipyridine and 2-ferrocenyl-1,10-phenanthroline in the presence of the N-acylamino acid salt as the asymmetric catalyst was performed. Some reactions of the resulting bicyclic palladium derivatives with tridentate (N,N,C) ligands were studied.
Neutral and Cationic Iridium(I) Complexes Bearing Chiral Phenanthroline-Derived Benzimidazolylidenes: Synthetic, Structural, and Catalytic Studies
作者:Costa Metallinos、Xiangdong Du
DOI:10.1021/om801063w
日期:2009.2.23
A series of neutral and cationic iridium(I) complexes bearing chiral and achiral phenanthroline-derived benzimidazolylidene ligands were synthesized and characterized. Spectroscopic and crystallographic data indicate that the principal plane of the NHC ligand in the achiral complexes is positioned orthogonally with respect to the Ir-Cl or Ir-P bonds, while the planes of NHC ligands in the corresponding chiral complexes are twisted by a torsion angle that depends on the size of the 2,9-substituents. All of the new complexes showed varying degrees of catalytic activity and enantioselectivity toward hydrogenation of acetamidoacrylates, with the best results being achieved using 2,9-diphenyl-substituted (S,S)-20a, which afforded (-)-(R)-methyl 2-acetamidopropanoate (12a) in 97% yield and 81 % ee.
Butler, Ian R.; Roustan, Jean-Louis, Canadian Journal of Chemistry, 1990, vol. 68, # 12, p. 2212 - 2215