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Polymerization of Acetonitrile via a Hydrogen Transfer Reaction from CH3 to CN under Extreme Conditions

Journal Article · · Angewandte Chemie International Edition (Online)
 [1];  [2];  [3];  [4];  [1];  [5];  [4];  [3];  [6];  [7];  [8];  [9];  [8];  [10];  [11]
  1. Center for High Pressure Science and Technology Advanced Research, Beijing (China)
  2. Center for High Pressure Science and Technology Advanced Research, Beijing (China) ; Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.
  3. Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Cornell Univ., Ithaca, NY (United States); Yanshan University State Key Laboratory of Metastable Materials Science and Technology, Qinhuangdao (China)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Julich Research Centre (Germany). Julich Centre for Neutron Science (JCNS)
  7. Center for High Pressure Science and Technology Advanced Research, Beijing (China); Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  9. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS); National Polytechnic School, Quito (Ecuador)
  10. Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.; European Spallation Source ERIC, Lund (Sweden)
  11. Center for High Pressure Science and Technology Advanced Research, Beijing (China); Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab.; Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.

Acetonitrile (CH3CN) is the simplest and one of the most stable nitriles. Reactions usually occur on the C≡N triple bond, while the C-H bond is very inert and can only be activated by a very strong base or a metal catalyst. In this study, it is demonstrated that C-H bonds can be activated by the cyano group under high pressure, but at room temperature. The hydrogen atom transfers from the CH3 to CN along the CH···N hydrogen bond, which produces an amino group and initiates polymerization to form a dimer, 1D chain, and 2D nanoribbon with mixed sp2 and sp3 bonded carbon. Lastly, it transforms into a graphitic polymer by eliminating ammonia. This study shows that applying pressure can induce a distinctive reaction which is guided by the structure of the molecular crystal. It highlights the fact that very inert C-H can be activated by high pressure, even at room temperature and without a catalyst.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; SC0001057; NA0002006
OSTI ID:
1311293
Alternate ID(s):
OSTI ID: 1401702
OSTI ID: 1354484
OSTI ID: 1388073
Journal Information:
Angewandte Chemie International Edition (Online), Journal Name: Angewandte Chemie International Edition (Online) Vol. 55; ISSN 1521-3773
Publisher:
Gesselschaft Deutscher ChemikerCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Pressure-Induced Diels-Alder Reactions in C 6 H 6 -C 6 F 6 Cocrystal towards Graphane Structure journal January 2019
Pressure-Induced Diels-Alder Reactions in C 6 H 6 -C 6 F 6 Cocrystal towards Graphane Structure journal January 2019
Visible responses under high pressure in crystals: phenolphthalein and its analogues with adjustable ring-opening threshold pressures journal January 2019
A step toward better understanding of behavior of organic materials at simultaneous high pressures and high temperatures journal May 2018
From Molecules to Carbon Materials—High Pressure Induced Polymerization and Bonding Mechanisms of Unsaturated Compounds journal September 2019

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