Organoboron Compounds. I. On the Reaction of <I>n</I>-Butylboronic Acid with Polyvinylalcohol
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概要
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It has been shown that PVA is partially esterified with <I>n</I>-butylboronic acid, giving products of the form of PVA (<U>Remark: Graphics omitted.</U>)B-<I>n</I>-Bu.<BR>The esterification grade, <I>E</I><SUB>g</SUB>, of the products is estimated from the boron content. <I>E</I><SUB>g</SUB> increases with the increasing concentration of <I>n</I>-butylboronic acid used, the maximum <I>E</I><SUB>g</SUB> being 85.6%. <I>E</I><SUB>g</SUB> rises from 69.3 to 85.6% as the reaction temperature is elevated from 40 to 70°C.<BR>On treating with <I>n</I>-butylboronic acid PVA shows new absorption bands 1190 and 1390 cm<SUP>－1</SUP> in deeper infrared spectra, which are assigned respectively to –B–C and –B–O bonds. At the same time the OH stretching absorption band at 3280 cm<SUP>－1</SUP> of PVA shifts to a higher frequency, and decreases in intensity with the increasing <I>E</I><SUB>g</SUB>.
- 社団法人 日本化学会の論文
著者
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Kato Seiji
Tokyo College of Science
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Kato S.
Tokyo College of Science
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Tsuzuki Yojiro
Tokyo College of Science
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Kitajima Shigenobu
Tokyo College of Science
関連論文
- Organoboron Compounds. I. On the Reaction of n-Butylboronic Acid with Polyvinylalcohol
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