Cyclic Disilylated and Digermylated Germylenes

The preparation of triethylphosphine adducts of cyclic disilylated or digermylated germylenes was achieved by reaction of 1,4-dipotassio-1,1,4,4-tetrakis­(trimethylsilyl)­tetramethyltetrasilane with GeBr2·(dioxane) and PEt3. Phosphine abstraction with B­(C6F5)3 allowed formation of the base-free ger...

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Bibliographic Details
Published inOrganometallics Vol. 32; no. 11; pp. 3404 - 3410
Main Authors Hlina, Johann, Baumgartner, Judith, Marschner, Christoph, Albers, Lena, Müller, Thomas
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 10.06.2013
Amer Chemical Soc
Subjects
Chemistry
Chemistry, Inorganic & Nuclear
Chemistry, Organic
Physical Sciences
Science & Technology
SILYLENE
REDUCTION
ENHANCEMENT
SIGNALS
HETEROCYCLOSILANES
DIMERIZATION
CARBENE HOMOLOGS
POLARIZATION TRANSFER
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Summary:The preparation of triethylphosphine adducts of cyclic disilylated or digermylated germylenes was achieved by reaction of 1,4-dipotassio-1,1,4,4-tetrakis­(trimethylsilyl)­tetramethyltetrasilane with GeBr2·(dioxane) and PEt3. Phosphine abstraction with B­(C6F5)3 allowed formation of the base-free germylenes, which undergo 1,2-trimethylsilyl shifts to the germylene atom to form the respective silagermene or digermene, which further dimerize in [2 + 2] cycloadditions to tricyclic compounds. The reasons responsible for the germylenes’ completely different reactivities in comparison to the previously studied analogous stannylenes and plumbylenes were elucidated in a theoretical study.
Bibliography:ObjectType-Article-1
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ISSN:0276-7333
1520-6041
DOI:10.1021/om400365v