Synthesis and structural characterization of organometallic cyclynes: novel nanoscale, carbon-rich topologies
作者:Matthew Laskoski、Winfried Steffen、Jason G.M Morton、Mark D Smith、Uwe H.F Bunz
DOI:10.1016/s0022-328x(03)00145-1
日期:2003.4
A combination of Pd- and Cu-catalyzed couplings make the ferrocene and cyclobutadiene(cyclopentadienylcobalt)-based half-wheels and the cyclobutadiene(cyclopentadienylcobalt)-based seco-wheel accessible. These targets can formally be constructed by fusing two or three organometallic benzohexadehydro[14]annulenes along an alkyne unit. In addition, a ferrocene-based, enlarged version of the half wheel
Pd和Cu催化偶合的组合使二茂铁和环丁二烯(环戊二烯钴)基半轮和环丁二烯(环戊二烯钴)基二元轮可接近。这些靶标可通过将两个或三个有机金属苯并六氢[14]环烯烃沿着炔烃单元融合而正式构建。此外,还准备了基于二茂铁的半轮的扩大版。该目标化合物是通过将两种有机金属苯并十二氢[18]环烯烃形式熔融而获得的。环丁二烯配合物C 51 H 37 Co,二茂铁衍生物C 51 H 36 Fe和环丁二烯配合物C 69 H 59三个靶分子的单晶结构Co被执行以验证所提议的几何形状。
Dimethyldihydropyrene−Dehydrobenzoannulene Hybrids: Studies in Aromaticity and Photoisomerization
作者:David B. Kimball、Michael M. Haley、Reginald H. Mitchell、Timothy R. Ward、Subhajit Bandyopadhyay、Richard Vaughan Williams、John R. Armantrout
DOI:10.1021/jo020462q
日期:2002.12.1
The synthesis and study of dehydrobenzoannulene (DBA)-dimethyldihydropyrene (DDP) hybrids as models for the investigation of aromaticity in weakly diatropic systems is reported. Three new monofused DBA-DDP hybrids have been synthesized, and their NMR spectra are discussed with regard to quantifying the aromaticity remaining in multibenzene-fused DBAs. Nucleus-independent chemical shifts, determined at a series of locations for each compound, bond lengths, and H-1 and C-13 NMR chemical shifts were calculated and used to probe the aromaticity of these hybrids. Systems where more than one annulene/DBA is fused to the DDP core have also been obtained, and their potential use in photoinduced isomerization applications is discussed.
Synthesis and characterization of pyridine- and thiophene-based platinacyclynes
作者:Charles A. Johnson、Benjamin A. Baker、Orion B. Berryman、Lev N. Zakharov、Matthew J. O’Connor、Michael M. Haley
DOI:10.1016/j.jorganchem.2005.09.008
日期:2006.1
Seven heterocyclic macrocycles, including the first platinacycles with pyridine and thiophene rings incorporated into the cyclyne system, are reported. Pt-acetylide cyclynes were assembled via tin transmetallation or amine-mediated oxidative addition with stoichiometric PtCl2(PEt3)(2) and CuI. The organometallic cyclynes exhibited enhanced electronic properties compared to previously described platinabenzocyclynes. (c) 2005 Elsevier B.V. All rights reserved.
Synthesis and Structural Characterization of Organometallic Cyclynes: Novel Nanoscale, Carbon-Rich Topologies
作者:Matthew Laskoski、Winfried Steffen、Jason G. M. Morton、Mark D. Smith、Uwe H. F. Bunz