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异丙醇钛

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异丙醇钛
IUPAC名
Titanium isopropoxide
别名 四异丙醇钛、钛酸四异丙酯
识别
CAS号 546-68-9  ✓
InChI
性质
化学式 C12H28O4Ti
摩尔质量 284.26 g·mol⁻¹
外观 无色液体
密度 0.937 g/cm3
熔点 18–20 °C
沸点 85 °C/1.5 mm Hg
溶解性 水解生成TiO2
可溶于许多有机溶剂
相关物质
其他阳离子 异丙醇铝
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。

异丙醇钛四异丙醇钛(IV)的异丙醇化学式为Ti{OCH(CH3)2}4,用于有机合成材料科学中。

异丙醇钛结构复杂。晶态时,异丙醇钛为四聚体,分子式为Ti4(OCH3)16[1]非极性溶剂中不聚合,[2]为四面体型反磁性分子。

制备

异丙醇钛可由四氯化钛异丙醇反应制得,副产物为氯化氢

TiCl4 + 4 (CH3)2CHOH → Ti{OCH(CH3)2}4 + 4 HCl

性质

异丙醇钛水解生成二氧化钛

Ti{OCH(CH3)2}4 + 2 H2O → TiO2 + 4 (CH3)2CHOH

该反应是溶胶-凝胶法合成含TiO2材料的基础。产物的特性由添加剂(如乙酸)、加水的量以及混合速度决定 [3]

异丙醇钛用作Sharpless不对称环氧化反应中的路易斯碱Kulinkovich反应制备三元环的催化剂,以及合成前手性硫醚立体选择性氧化时所用的异丙醇钛衍生物催化剂。[4]

参考资料

  1. ^ Wright D. A.; Williams, D. A. “The Crystal and Molecular Structure of Titanium Tetramethoxide” Acta Crystallographica 1968, Volume B24, pages 1107-1114. doi:10.1107/S0567740868003766
  2. ^ Bradley, D. C.; Mehrotra, R.; Rothwell, I.; Singh, A. “Alkoxo and Aryloxo Derivatives of Metals” Academic Press, San Diego, 2001. ISBN 0121241408.
  3. ^ Hanaor, D.A.H.; Chironi, I.; Karatchevtseva, I.; Triani, G.; Sorrell, C.C. Single and Mixed Phase TiO2 Powders Prepared by Excess Hydrolysis of Titanium Alkoxide. Advances in Applied Ceramics. 2012, 111 (3): 149–158 [2015-10-25]. doi:10.1179/1743676111Y.0000000059. (原始内容存档于2021-04-24). 
  4. ^ S. H. Zhao, O. Samuel, H. B. Kagan “Enantioelective Oxidation of a Sulfide:: (S)-(-)-Methyl p-Tolyl Sulfoxide” Organic Syntheses, Collected Volume 8, p.464 (1993).http://www.orgsyn.org/orgsyn/pdfs/CV8P0464.pdf
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异丙醇钛
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