Mixed Coordination Modes of 1,2-bis(Diphenylphosphino)Ethane in the Ionic Triiron(II) Complex [Fe(dppe)2(MeCN)2][(FeCl3)2(μ2-dppe)]
摘要:
The iron(II) complex salt [Fe(dppe)(2)(MeCN)(2)][(FeCl3)(2)(mu 2-dppe)] (1) was synthesized by the reaction of FeCl2 with dppe in the presence of sodium 2-mercaptobenzothiazole(Nambt). The molecule contains a mononuclear Fe(II) cation and a binuclear Fe(II) anion with the three dppe ligands in two coordination modes. A single crystal x-ray study showed that the anionic part has a zigzagging chain of a Fe2P2C2 core without metal-metal bonding but having an eta(1),eta(1)-dppe bridge between two trans-oriented FeCl3 moieties with Fe(II) in tetrahedral geometry. The cation has two dppe ligands in the equatorial and two acetonitrile molecules in the axial positions forming an octahedral coordination environment for iron.
p-Diethynylbenzene-based molecular wires, Fe–C C-p-C6H2X2–C C–Fe [Fe= Fe(η5-C5Me5)(dppe)]: Synthesis, substituent effects and unexpected formation of benzodifuran complex
作者:Yumi Matsuura、Yuya Tanaka、Munetaka Akita
DOI:10.1016/j.jorganchem.2009.01.019
日期:2009.5
A series of p-diethynylbenzene- based molecular wires, Fe-C C-p-C6H2X2-C C-Fe (3) (Fe = FeCp* (dppe)), is prepared and their wire-like performance is estimated on the basis of the K-C and V-ab values. It has been revealed that electron-donating substituents (X) improve the performance. The benzodifuran complex 4 unexpectedly formed from the derivative with X = OH shows the performance comparable to 3. (C) 2009 Elsevier B.V. All rights reserved.