Download Carbon Rich Compounds II, Macrocyclic Oligoacetylenes and by Armin de Meijere PDF

By Armin de Meijere

The definition of Carbon wealthy Compounds utilized during this as within the earlier quantity (TCC quantity 196) of this sequence at the similar basic subject contains carbon skeletons with a carbon to hydrogen ratio of 1:(kleiner gleich 1), which finally implies all-carbon compounds (i.e. carbon allotropes). the present quantity covers glossy equipment for the coupling - regularly steel catalyzed - of subsystems including double bonds, cyclopropyl teams, arenes, and metal-complexed pi-systems with acetylene and diacetylene devices. The ensuing constructions diversity from macrocycles, together with people with all kinds of linkers among the acetylene and diacetylene devices, to carrying out polymers and light-emitting fabrics. anywhere applicable, chemical differences of those fascinating compounds and fabrics are mentioned as well.

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Additional resources for Carbon Rich Compounds II, Macrocyclic Oligoacetylenes and Other Linearly Conjugated Systems

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One- and two-component preparations of permethyl-exp-[6]rotane 173 tendency of the permethylated acyclic higher dehydrooligomers to decompose at room temperature in the syringe pump. Apparently, the current methodology does not allow the preparation of macrocyclic oligodiacetylenes which would be even more highly strained than the butadiyne-expanded [n]rotanes 165–171. 1]heptane dehydrotrimer 151. 1]heptane moiety has been retained and a second one has undergone ring opening by formal addition of chlorine (Scheme 31) [48].

2 Structure-Property Relationships in Nonlinear Optical Tetraethynylethenes . . . . . . . . . . . . . . 72 4 Conclusions . . . . . . . . . . . . . . . . 73 5 References . . . . . . . . . . . . . . . . 74 1 Introduction Acetylenic molecular scaffolding has turned into a major area of research over the past decade, fueled by several different yet simultaneous developments. The mass-spectrometric observation of buckminsterfullerene (C60) and the proposal that it has a stable soccer-ball-type structure in 1985 [1], followed in 1990 by the isolation of this first molecular allotrope of carbon in bulk quantities [2], led chemists to search for other stable molecular and polymeric – non-fullerenic – forms of carbon, which it might be possible to synthesize and isolate.

73 5 References . . . . . . . . . . . . . . . . 74 1 Introduction Acetylenic molecular scaffolding has turned into a major area of research over the past decade, fueled by several different yet simultaneous developments. The mass-spectrometric observation of buckminsterfullerene (C60) and the proposal that it has a stable soccer-ball-type structure in 1985 [1], followed in 1990 by the isolation of this first molecular allotrope of carbon in bulk quantities [2], led chemists to search for other stable molecular and polymeric – non-fullerenic – forms of carbon, which it might be possible to synthesize and isolate.

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