環戊二烯基銦(I)

環戊二烯基銦(I)

识别
CAS号	34822-89-4 ^Y
PubChem	85397242
ChemSpider	9270356
SMILES	[CH]1[CH][CH][CH][CH]1.[In]
InChI	1S/C5H5.In/c1-2-4-5-3-1;/h1-5H;
InChIKey	JZPXQBRKWFVPAE-UHFFFAOYSA-N
性质
化学式	C₅H₅In
摩尔质量	179.913 g·mol⁻¹
外观	乳白色固體
危险性
GHS危险性符号
GHS提示词	警告
H-术语	H228, H302, H315, H319, H335
P-术语	P210, P240, P241, P261, P264, P270, P271, P280, P301+312, P302+352, P304+340, P305+351+338, P312, P321
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

环戊二烯基铟(I)，化學式為C₅H₅In，通常缩写为CpIn（Cp⁻為環戊二烯基陰離子），是一种含有+1氧化态铟的有机铟化合物，具有半夹心结构的环戊二烯基络合物。它是第一个 (1957年 ^[1] ) 被發現報告的低价有机铟化合物。

制备和化学性質

环戊二烯基铟(I)可以輕易地通过氯化铟(I)与環戊二烯基鋰反应制备： ^[2]

{\ce {InCl +CpLi->CpIn +LiCl}}

环戊二烯基铟(I)可与三氟化硼、三氯化硼、三溴化硼、三碘化硼和三甲基硼烷反应形成錯合物，^[3]例如：

{\ce {CpIn + BF3 -> CpIn*BF3}}

在这些錯合物中，環戊二烯基配体与铟原子的键合會从η⁵（π錯合）变为η¹（σ键合）。

含有+1氧化态的铟，具InX₂^-(X為鹵素)阴离子的盐可由环戊二烯基铟(I)製備，例如： ^[4]

{\ce {C5H5In +HCl +NEt4Cl -> NEt4InCl2 + C5H6}}

结构和鍵結

環戊二烯基銦(I)固體是聚合物，為交替的铟原子和茂单元所形成的锯齿形链组成。两个铟原子与每个茂环的相对面相互作用，几乎垂直于环平面，而两个环与每个铟原子相互作用，形成约128°的鍵角。 ^[5]在气相中存在的環戊二烯基銦(I)单体中，铟原子位于芳族茂的中心轴上。

環戊二烯基銦(I)的键結研究表明，环戊二烯基阴离子的芳环电子會与铟的5s和5p原子轨道相互作用，而铟原子上的孤对電子是主要特征。^[6]



在环戊二烯基铟(I)的晶体结构中CpIn链的球棒和空间填充模型

参考資料

^ Fischer E.O.; Hofmann H.P. Metall-cyclopentadienyle des Indiums. Angew. Chem. 1957, 69 (20): 639. doi:10.1002/ange.19570692008.
^ Peppe C.; Tuck D.G.; Victoriano L. A simple synthesis of cyclopentadienylindium(I). J. Chem. Soc., Dalton Trans. 1981, 69 (12): 2592. doi:10.1039/DT9810002592.
^ Contreras J. G.; Tuck D. G. Coordination compounds of indium. XXIII. Adducts of cyclopentadienylindium(I) with boron trihalides or trimethylboron. Inorganic Chemistry. 1973, 12 (11): 2596–2599. doi:10.1021/ic50129a021.
^ Habeeb J.J.; Tuck D.G. Co-ordination compounds of indium. Part XXXI. Further studies of anionic complexes of indium(I). J. Chem. Soc., Dalton Trans. 1976, (10): 866–869. doi:10.1039/DT9760000866.
^ Beachley O. T.; Pazik J. C.; Glassman T. E.; Churchill M. R.; Fettinger J.C.; Blom R. Synthesis, characterization and structural studies of In(C₅H₄Me) by x-ray diffraction and electron diffraction techniques and a reinvestigation of the crystalline state of In(C₅H₅) by x-ray diffraction studies. Organometallics. 1988, 7 (5): 1051–1059. doi:10.1021/om00095a007.
^ Lin C.S. Tuck D.G. The electronic structure of cyclopentadienylindium. Can. J. Chem. 1982, 60 (6): 699–702. doi:10.1139/v82-103.

铟化合物

铟(I)

有机铟(I)化合物	[In(C₅H₅)]

铟(I,III)

铟(III)

有机铟(III)化合物	In(C₅H₇O₂)₃ In(C₂H₅)₃ In(CH₃)₃

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