Non-aqueous selective synthesis of orthosilicic acid and its oligomers

Masayasu Igarashi, Tomohiro Matsumoto, Fujio Yagihashi, Hiroshi Yamashita, Takashi Ohhara, Takayasu Hanashima, Akiko Nakao, Taketo Moyoshi, Kazuhiko Sato () and Shigeru Shimada ()
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Masayasu Igarashi: National Institute of Advanced Industrial Science and Technology (AIST)
Tomohiro Matsumoto: National Institute of Advanced Industrial Science and Technology (AIST)
Fujio Yagihashi: National Institute of Advanced Industrial Science and Technology (AIST)
Hiroshi Yamashita: National Institute of Advanced Industrial Science and Technology (AIST)
Takashi Ohhara: Neutron Science Section, J-PARC Center, Japan Atomic Energy Agency
Takayasu Hanashima: Comprehensive Research Organization for Science and Society
Akiko Nakao: Comprehensive Research Organization for Science and Society
Taketo Moyoshi: Comprehensive Research Organization for Science and Society
Kazuhiko Sato: National Institute of Advanced Industrial Science and Technology (AIST)
Shigeru Shimada: National Institute of Advanced Industrial Science and Technology (AIST)

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Orthosilicic acid (Si(OH)4) and its small condensation compounds are among the most important silicon compounds but have never been isolated, due to their instability. These compounds would be highly useful building blocks for advanced materials if they became available at high purity. Here we show a simple procedure to selectively synthesize orthosilicic acid and its dimer, cyclic trimer and tetramer in organic solvents. Isolation of orthosilicic acid, the dimer and the cyclic tetramer as hydrogen-bonded crystals with tetrabutylammonium halides and the cyclic trimer as solvent-containing crystals is also described. The solid-state structures of these compounds are unambiguously clarified by single crystal X-ray and neutron diffraction studies. The usefulness of orthosilicic acid and its oligomers prepared by the new procedure is demonstrated by the synthesis of functionalized oligosiloxanes.

Date: 2017
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DOI: 10.1038/s41467-017-00168-5

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