Organometallic π-Tweezers, NCN Pincers, and Ferrocenes as Molecular “Tinkertoys” in the Synthesis of Multiheterometallic Transition-Metal Complexes
作者:Heinrich Lang、Rico Packheiser、Bernhard Walfort
DOI:10.1021/om058042p
日期:2006.4.1
describes the synthesis, reaction chemistry, structures, and bonding of early−late heterodi-, heterotri-, and heterotetrametallic transition-metal complexes by applying the molecular “Tinkertoy” approach. As connecting units between the different metal atoms, π-conjugated carbon-rich organic and/or inorganic groups can be used. The electrochemical behavior of such one-dimensional molecular wire molecules
Facile conversion of bis(alkynyl) into diyne ligand on platinum assisted by electrophilic gold phosphine
作者:Cleber V Ursini、Gilson H.M Dias、Manfredo Hörner、Adailton J Bortoluzzi、Milton K Morigaki
DOI:10.1016/s0277-5387(00)00487-3
日期:2000.11
P-31 NMR spectroscopy measurements were used to establish the course for the stoichiometric-dependent reactions between [Au(PPh3)](+) and [Pt(C drop CPh)(2)(dppf)] (1), which for equimolar amounts afford as the unique product [Pt-eta (3)-C(C drop CPh)double bondC(Ph)Au(PPh3)}(dppf)](+) (2), but any excess of 1 gives also [Pt(eta (2)-PhC drop CC drop CPh)(dppf)] (3) [dppf = 1,1'-bis(diphenylphosphine)ferrocene]. Both compounds 2 and 3 were obtained straightforwardly by the reactions of 3 with [Au(PPh3)](+) and [Pt(C2H4)(dppf)] with 1,4-diphenylbutadiyne, respectively. The X-ray crystal structure analysis of 3 confirmed a trigonal-planar coordination geometry about the platinum atom, and a bent eta (2)-coordinated diyne ligand. (C) 2000 Elsevier Science B.V. All rights reserved.