Synthesis of Linear Acetylenic Carbon: The "sp" Carbon Allotrope

@article{Lagow1995SynthesisOL,
  title={Synthesis of Linear Acetylenic Carbon: The "sp" Carbon Allotrope},
  author={Richard J. Lagow and Joel J. Kampa and Han-Chao Wei and Scott L. Battle and John W. Genge and David A. Laude and Carla J. Harper and Robert Bau and Raymond C. Stevens and James F. Haw and Eric J Munson},
  journal={Science},
  year={1995},
  volume={267},
  pages={362 - 367}
}
A carbon allotrope based on "sp" hybridization containing alternating triple and single bonds (an acetylenic or linear carbon allotrope) has been prepared. Studies of small (8 to 28 carbon atoms) acetylenic carbon model compounds show that such species are quite stable (130� to 140�C) provided that nonreactive terminal groups or end caps (such as tert-butyl or trifluoromethyl) are present to stabilize these molecules against further reactions. In the presence of end capping groups, laser-based… 

Synthesis of polyynes to model the sp-carbon allotrope carbyne

TLDR
A series of conjugated polyynes — the longest of which contains 44 contiguous acetylenic carbons — have been synthesized and their spectroscopic properties investigated.

End-cap stabilized oligoynes: model compounds for the linear sp carbon allotrope carbyne.

TLDR
Based on the trends in the spectroscopic behaviour of those molecules with increasing chain length, electronic as well as the NMR properties of carbyne are predicted, in line with the previously reported results.

Dicyanopolyynes: A Homologuous Series of End‐Capped Linear sp Carbon

The synthesis, isolation, spectroscopic characterization, and computational investigations of the rod-shaped dicyanopolyynes 1–6 (C2nN2, n = 4–9), which are model substances for the hypothetical

Pseudocarbynes: Charge-Stabilized Carbon Chains.

TLDR
Ab initio calculations of uncapped and capped linear carbon chains and their complexes with gold clusters indicate that gold dramatically alters the electron densities of the C≡C bonds, which leads to pseudocarbynes.

CYCLIC AND LINEAR ACETYLENIC MOLECULAR SCAFFOLDING

During the past decade, the construction and investigation of expanded acetylenic π-chromophores has become a central area of chemical research. It has been fueled by the availability of new

Carbyne with finite length: The one-dimensional sp carbon

TLDR
It is established that the combination of gold and alcohol is crucial to carbyne formation because carbon-hydrogen bonds can be cleaved with the help of gold catalysts under the favorable thermodynamic environment provided by laser ablation in liquid.
...

References

SHOWING 1-10 OF 25 REFERENCES

All-Carbon Molecules: Evidence for the Generation of Cyclo[18]carbon from a Stable Organic Precursor

TLDR
The synthesis and x-ray crystal structure of a direct precursor to C18 are described, and structural evidence is provided for the generation of an all-carbon molecule from a well-characterized organic precursor.

Annealing C60+: Synthesis of Fullerenes and Large Carbon Rings

TLDR
Experimental studies of the annealing of the non-fullerene C60+ ions indicate that they can be converted into the fullerene and an isomer that appears to be a large monocyclic ring, suggesting that this is a relatively stable non-spheroidal form of these all carbon molecules.

Annealing Carbon Cluster Ions: A Mechanism for Fullerene Synthesis

We describe studies of the annealing and dissociation of even-numbered carbon cluster ions containing 50-70 atoms. The polycyclic polyyne ring isomers for cluster ions in this size regime can be

Carbon clusters revisited: The ‘‘special’’ behavior of C60 and large carbon clusters

We have performed a series of experiments in which the conditions necessary for synthesis and detection of carbon clusters have been systematically investigated. The effects of ionizing laser

Structures of carbon cluster ions from 3 to 60 atoms: Linears to rings to fullerenes

A new method for identifying and characterizing cluster ion isomers is presented. Results indicate that most carbon clusters have more than one stable form, with 29≤n≤45 indicating three or four

The formation of long carbon chain molecules during laser vaporization of graphite

Graphite is laser vaporized into a He carrier gas containing various simple molecules such as H/sub 2/, H/sub 2/O, NH/sub 3/, and CH/sub 3/CN, supersonically expanded, and skimmed into a molecular

Solid C60: a new form of carbon

A new form of pure, solid carbon has been synthesized consisting of a somewhat disordered hexagonal close packing of soccer-ball-shaped C60 molecules. Infrared spectra and X-ray diffraction studies

Hypothetical metallic allotrope of carbon

In 1 there are infinite polyene chains (no assumption made as yet concerning bond localization within each chain) running along two dimensions and no conjugation along the third dimension. While the