Dichlorogallane (HGACl2)2: Its molecular structure and synthetic potential

Stefan Nogai; Hubert Schmidbaur

doi:10.1021/ic0203015

Dichlorogallane (HGACl₂)₂: Its molecular structure and synthetic potential

Stefan Nogai, Hubert Schmidbaur

Department of Chemistry

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

Dichlorogallane (HGaCl₂)₂ is readily prepared from gallium trichloride and triethylsilane in quantitative yield. Its crystal structure has been determined by single crystal X-ray diffraction. In the chlorine-bridged dimers of crystallographically imposed C_2h symmetry, the terminal hydrogen atoms are in trans positions. In the reaction with 2 equiv of triethylphosphine, the mononuclear complex (Et₃P)GaHCl₂ is formed. Thermal decomposition of (HGaCl₂)₂ affords hydrogen gas and quantitative yields of "GaCl₂" as mixed-valent Ga[GaCl₄]. Treatment of this product with triethylphosphine gives the symmetrical, Ga-Ga-bonded gallium(II) complex [GaCl₂(PEt₃)]₂ with an ethane-type structure and with the phosphine ligands in a single-trans conformation. The corresponding [GaBr₂(PEt₃)]₂ complex is prepared from Ga[GaBr₄] and has an analogous structure. (Et₃P)GaCl₃ has been synthesized and structurally characterized as a reference compound.

Original language	English
Pages (from-to)	4770-4774
Number of pages	5
Journal	Inorganic Chemistry
Volume	41
Issue number	18
DOIs	https://doi.org/10.1021/ic0203015
State	Published - 9 Sep 2002

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abstract = "Dichlorogallane (HGaCl2)2 is readily prepared from gallium trichloride and triethylsilane in quantitative yield. Its crystal structure has been determined by single crystal X-ray diffraction. In the chlorine-bridged dimers of crystallographically imposed C2h symmetry, the terminal hydrogen atoms are in trans positions. In the reaction with 2 equiv of triethylphosphine, the mononuclear complex (Et3P)GaHCl2 is formed. Thermal decomposition of (HGaCl2)2 affords hydrogen gas and quantitative yields of {"}GaCl2{"} as mixed-valent Ga[GaCl4]. Treatment of this product with triethylphosphine gives the symmetrical, Ga-Ga-bonded gallium(II) complex [GaCl2(PEt3)]2 with an ethane-type structure and with the phosphine ligands in a single-trans conformation. The corresponding [GaBr2(PEt3)]2 complex is prepared from Ga[GaBr4] and has an analogous structure. (Et3P)GaCl3 has been synthesized and structurally characterized as a reference compound.",

author = "Stefan Nogai and Hubert Schmidbaur",

year = "2002",

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doi = "10.1021/ic0203015",

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T1 - Dichlorogallane (HGACl2)2

T2 - Its molecular structure and synthetic potential

AU - Nogai, Stefan

AU - Schmidbaur, Hubert

PY - 2002/9/9

Y1 - 2002/9/9

N2 - Dichlorogallane (HGaCl2)2 is readily prepared from gallium trichloride and triethylsilane in quantitative yield. Its crystal structure has been determined by single crystal X-ray diffraction. In the chlorine-bridged dimers of crystallographically imposed C2h symmetry, the terminal hydrogen atoms are in trans positions. In the reaction with 2 equiv of triethylphosphine, the mononuclear complex (Et3P)GaHCl2 is formed. Thermal decomposition of (HGaCl2)2 affords hydrogen gas and quantitative yields of "GaCl2" as mixed-valent Ga[GaCl4]. Treatment of this product with triethylphosphine gives the symmetrical, Ga-Ga-bonded gallium(II) complex [GaCl2(PEt3)]2 with an ethane-type structure and with the phosphine ligands in a single-trans conformation. The corresponding [GaBr2(PEt3)]2 complex is prepared from Ga[GaBr4] and has an analogous structure. (Et3P)GaCl3 has been synthesized and structurally characterized as a reference compound.

AB - Dichlorogallane (HGaCl2)2 is readily prepared from gallium trichloride and triethylsilane in quantitative yield. Its crystal structure has been determined by single crystal X-ray diffraction. In the chlorine-bridged dimers of crystallographically imposed C2h symmetry, the terminal hydrogen atoms are in trans positions. In the reaction with 2 equiv of triethylphosphine, the mononuclear complex (Et3P)GaHCl2 is formed. Thermal decomposition of (HGaCl2)2 affords hydrogen gas and quantitative yields of "GaCl2" as mixed-valent Ga[GaCl4]. Treatment of this product with triethylphosphine gives the symmetrical, Ga-Ga-bonded gallium(II) complex [GaCl2(PEt3)]2 with an ethane-type structure and with the phosphine ligands in a single-trans conformation. The corresponding [GaBr2(PEt3)]2 complex is prepared from Ga[GaBr4] and has an analogous structure. (Et3P)GaCl3 has been synthesized and structurally characterized as a reference compound.

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 18

ER -

Dichlorogallane (HGACl₂)₂: Its molecular structure and synthetic potential

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