Crystalline Boragermenes

Boragermene 3 featuring a double bond between the Ge and dicoordinate B atoms has been synthesized for the first time by reacting the cyclic (alkyl)(boryl)germylene–PMe3 adduct 1 with Cl2BN(SiMe3)2 followed by reductive dehalogenation with KC8. Addition of a Lewis base (MeNHC) to 3 leads to the form...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2020-02, Vol.59 (8), p.3147-3150
Main Authors: Rao, Bin, Kinjo, Rei
Format: Article
Language:English
Subjects:
boron
Cleavage
Dehalogenation
double bonds
germanium
H2 activation
Lewis base
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Summary:Boragermene 3 featuring a double bond between the Ge and dicoordinate B atoms has been synthesized for the first time by reacting the cyclic (alkyl)(boryl)germylene–PMe3 adduct 1 with Cl2BN(SiMe3)2 followed by reductive dehalogenation with KC8. Addition of a Lewis base (MeNHC) to 3 leads to the formation of the corresponding adduct 4, which shows double bond character between the Ge and tricoordinate B atoms. Compound 3 undergoes hydrogenation with H2 concomitant with a complete scission of the Ge=B bond. A boragermene featuring a double bond between the germanium and boron atoms has been isolated for the first time from a cyclic (alkyl)(boryl)germylene–PMe3 complex. This compound readily reacts with the Lewis base MeNHC to form the corresponding adduct on the boron center, and also undergoes hydrogenation with H2 across the Ge=B bond.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201914644