Formation of β‐carbyne by dehydrohalogenation

Liquid/solid two-phase carbonization of low-molecular-weight chloro-/bromo-hydrocarbons

“…The bands in the region of 2800–2900 cm −1 are assigned to the valence vibration of CH 2 groups. The overall feature of Figure 2A is quite similar to that of the polycumulene‐like materials made from poly(vinylidene dichloride) (PVDC) 15. On the other hand, the IR spectra of the carbons made from trichloroethanes show relatively stronger bands of carbon‐carbon triple bonds and carbon‐carbon single bonds around 2130 and 1100 cm −1 , respectively (Fig.…”

Dynamic Pressure Synthesis of Carbynes

“…It is also established that the fullerenes are built from a mix of Sp2 _Sp3 carbon atoms. The formation of carbyne has been confirmed in studies on intercalation of metals into polyacetylene under quasi-hydrostatic pressure of 20-40 kbar [29], and in experiments on intercalation of carbyne prepared by chemical dehydrochlorination of poly(vinylidene chloride) (PVOC) powder mixed with potassium hydroxide in ethanol and THF [30] using a procedure reported in [31]. Adapting the kinked-chain model [32] to the results of the analysis conducted on the products of intercalation, a structure of linear carbon chains with intercalated Na atoms (CIC-Na) was proposed to explain the observed diffraction pattern shown in Table VI.…”

Carbonization of trichloroethanes with anhydrous potassium hydroxide

“…This reaction proceeds electrochemically 4 or chemically at room temperature by action of some anion radicals, alkali metals, and alkali metal amalgams. 5 Carbynes also can be prepared from several polymeric precursors such as poly(vinylidene halides) 6 and chlorinated polyacetylene 7 by dehydrochlorination, which accelerates in the presence of phase transfer catalysts. However, dehydrochlorination of low molecular weight carbon halides into carbynes was only reported in a short communication.…”