Preparation and pyrolysis of poly(allyl iminoalane-co-ethyl iminoalane)s [HAlN(allyl)]_m[HAlNEt]_n

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• 作者：Yusuke Mori ; Yasuhiro Kumakura and Yoshiyuki Sugahara
• 关键词：Precursor ; Poly(allyl iminoalane-co-ethyl iminoalane)s ; Pyrolysis ; Hydroalumination ; Aluminum nitride
• 刊名：Journal of Organometallic Chemistry
• 出版年：2006
• 出版时间：1 October 2006
• 年：2006
• 卷：691
• 期：20
• 页码：4289-4296
• 全文大小：317 K

文摘

Poly(allyl iminoalane-co-ethyl iminoalane)s {[HAlN(allyl)]_m[HAlNEt]_n; Allyl/Et-alanes}, have been prepared by reactions of lithium hydridoaluminate (LiAlH₄) with a mixture of allylamine hydrochloride (CH₂CHCH₂NH₂ · HCl; allylNH₂ · HCl) and ethylamine hydrochloride (CH₃CH₂NH₂ · HCl; EtNH₂ · HCl) with various allyl/Et ratios. Spectroscopic analyses indicate that Allyl/Et-alane(1/3) (allyl/Et = 1/3) contains octamers possessing Al–H and C–H groups as well as CC, Al–N, and C–N bonds. The loss of aluminum during pyrolysis of Allyl/Et-alane(1/3) at 1600 °C under an Ar atmosphere is 15 % , which is less than the value reported for the pyrolysis of poly(ethyliminoalane) (36 % ). The suppression can be ascribed to cross-linking reactions involving allyl groups (hydroalumination and polymerization of the allyl groups), judging from infrared (IR) and solid-state nuclear magnetic resonance (NMR) spectroscopy.