Tetrakis(trimethylsilylbutadiynyl)ethene,An Extended Two-Dimensional pi-Conjugated System Consisting of Eighteen Carbon Atoms

摘要

Tetrakis(trimethylsilylbutadiynyl)ethene,containing an extended two-dimensional(2-D)pi-conjugated carbon system has been prepared and characterized by spectro-scopic and crystallographic methods.Polycarbon systems associated with pi-conjugated systems are expected to display unique physical properties,which are potentially applicable to materials science.The studies on 1-D system(e.g.molecular wire)are followed by those on 2-and 3-D systems,which are relevant to carbon allotropes(e.g.graphite,diamond,and fullerenes)and would lead to more sophisticated systems such as molecular switch based on the higher dimensionality.Ethene and benzene are two representative structural motifs 2-D of carbon systems(Chart 1)and their alkynylated de-