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Tetranitratoborate is an anion composed of boron with four nitrate groups. It can form salts with large cations such as tetramethyl ammonium nitratoborate, or tetraethyl ammonium tetranitratoborate.〔 The ion was first discovered by C. R. Guibert, M. D. Marshall in 1966 after failed attempts to make boron nitrate.〔 The related molecule, boron nitrate B(NO3)3, has resisted attempts to make it, and if it exists it is unstable above -78 °C.〔 Despite this non-existence it has a CAS number of 71816-39-2 and ChemSpider number of 25934735. Other related ions are the slightly more stable tetraperchloratoborates, with perchlorate groups instead of nitrate, and tetranitratoaluminate with the next atom down the periodic table, aluminium instead of boron (()−). ==Formation == Tetramethyl ammonium chloride reacts with BCl3 to make (CH3)4NBCl4. Then the tetrachloroborate is reacted with N2O4 at around -20° to form tetramethyl ammonium nitratoborate, and other gases such as NO2Cl and Cl2.〔 Another mechanism to make tetranitratoborate salts is to shake a metal nitrate with BCl3 in chloroform at 20 °C for several days. Chloronitratoborate ()− is an unstable intermediate. :MNO3 + BCl3 → M() :4M() → 3M() + MB(NO3)4] 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tetranitratoborate」の詳細全文を読む スポンサード リンク
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