Silylated Aminoarsenates with Novel and Conventional Structures

Michael Baier; Martin Paul; Hubert Schmidbaur

doi:10.1021/om00033a026

Silylated Aminoarsenates with Novel and Conventional Structures

Michael Baier, Martin Paul, Hubert Schmidbaur

Department of Chemistry

Technical University of Munich

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

4 Scopus citations

Abstract

The reaction of tris (trimethylsilyl) arsenate(V) and heptamethyldisilazane yields hexamethyldisiloxane and a crystalline adduct [(Me₃SiO)₃AsO·(Me₃SiO)₃AsNMe] (2). The crystal structure of 2 features a planar four-membered ring OAs₂N(Me) with two pentacoordinate arsenic atoms bridged symmetrically (point group C₂) by an oxygen atom and the methylimmo group. In benzene solution, compound 2 is dissociated into the components (Me₃SiO)AsO and the imino compound (Me₃SiO)₃AsNMe, which isomerizes to give the amino isomer (Me₃-SiO)₂AsO[N(Me)SiMe₃]. (Me₃SiO)₃AsO reacts with (trimethylsilyl)aniline to give again (Me₃-Si)₂O and bis(trimethylsilyl) (phenylamino)arsenate(V) (4). In the solid state two crystallographically nonequivalent aminoarsenate molecules (Me3SiO)₂AsO[N(H)Ph] with tetracoordinate arsenic atoms are associated into dimers via two NH⋯O hydrogen bonds.

Original language	English
Pages (from-to)	3527-3530
Number of pages	4
Journal	Organometallics
Volume	12
Issue number	9
DOIs	https://doi.org/10.1021/om00033a026
State	Published - 1993

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title = "Silylated Aminoarsenates with Novel and Conventional Structures",

abstract = "The reaction of tris (trimethylsilyl) arsenate(V) and heptamethyldisilazane yields hexamethyldisiloxane and a crystalline adduct [(Me3SiO)3AsO·(Me3SiO)3AsNMe] (2). The crystal structure of 2 features a planar four-membered ring OAs2N(Me) with two pentacoordinate arsenic atoms bridged symmetrically (point group C2) by an oxygen atom and the methylimmo group. In benzene solution, compound 2 is dissociated into the components (Me3SiO)AsO and the imino compound (Me3SiO)3AsNMe, which isomerizes to give the amino isomer (Me3-SiO)2AsO[N(Me)SiMe3]. (Me3SiO)3AsO reacts with (trimethylsilyl)aniline to give again (Me3-Si)2O and bis(trimethylsilyl) (phenylamino)arsenate(V) (4). In the solid state two crystallographically nonequivalent aminoarsenate molecules (Me3SiO)2AsO[N(H)Ph] with tetracoordinate arsenic atoms are associated into dimers via two NH⋯O hydrogen bonds.",

author = "Michael Baier and Martin Paul and Hubert Schmidbaur",

year = "1993",

doi = "10.1021/om00033a026",

language = "English",

volume = "12",

pages = "3527--3530",

journal = "Organometallics",

issn = "0276-7333",

publisher = "American Chemical Society",

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T1 - Silylated Aminoarsenates with Novel and Conventional Structures

AU - Baier, Michael

AU - Paul, Martin

AU - Schmidbaur, Hubert

PY - 1993

Y1 - 1993

N2 - The reaction of tris (trimethylsilyl) arsenate(V) and heptamethyldisilazane yields hexamethyldisiloxane and a crystalline adduct [(Me3SiO)3AsO·(Me3SiO)3AsNMe] (2). The crystal structure of 2 features a planar four-membered ring OAs2N(Me) with two pentacoordinate arsenic atoms bridged symmetrically (point group C2) by an oxygen atom and the methylimmo group. In benzene solution, compound 2 is dissociated into the components (Me3SiO)AsO and the imino compound (Me3SiO)3AsNMe, which isomerizes to give the amino isomer (Me3-SiO)2AsO[N(Me)SiMe3]. (Me3SiO)3AsO reacts with (trimethylsilyl)aniline to give again (Me3-Si)2O and bis(trimethylsilyl) (phenylamino)arsenate(V) (4). In the solid state two crystallographically nonequivalent aminoarsenate molecules (Me3SiO)2AsO[N(H)Ph] with tetracoordinate arsenic atoms are associated into dimers via two NH⋯O hydrogen bonds.

AB - The reaction of tris (trimethylsilyl) arsenate(V) and heptamethyldisilazane yields hexamethyldisiloxane and a crystalline adduct [(Me3SiO)3AsO·(Me3SiO)3AsNMe] (2). The crystal structure of 2 features a planar four-membered ring OAs2N(Me) with two pentacoordinate arsenic atoms bridged symmetrically (point group C2) by an oxygen atom and the methylimmo group. In benzene solution, compound 2 is dissociated into the components (Me3SiO)AsO and the imino compound (Me3SiO)3AsNMe, which isomerizes to give the amino isomer (Me3-SiO)2AsO[N(Me)SiMe3]. (Me3SiO)3AsO reacts with (trimethylsilyl)aniline to give again (Me3-Si)2O and bis(trimethylsilyl) (phenylamino)arsenate(V) (4). In the solid state two crystallographically nonequivalent aminoarsenate molecules (Me3SiO)2AsO[N(H)Ph] with tetracoordinate arsenic atoms are associated into dimers via two NH⋯O hydrogen bonds.

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DO - 10.1021/om00033a026

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JO - Organometallics

JF - Organometallics

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Silylated Aminoarsenates with Novel and Conventional Structures

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