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Stabilization of Classical [B2H5]−: Structure and Bonding of [(Cp*Ta)2(B2H5)(μ-H)L2] (Cp*=η5-C5Me5; L=SCH2S)
Koushik Saha, Sourav Kar, Suvam Saha, Rajarshi Halder, Beesam Raghavendra,
Published in Wiley-VCH Verlag
2019
PMID: 31553103
Volume: 58
   
Issue: 49
Pages: 17684 - 17689
Abstract
The room-temperature reaction of [Cp*TaCl4] with LiBH4⋅THF followed by addition of S2CPPh3 results in pentahydridodiborate species [(Cp*Ta)2(μ,η2:η2-B2H5)(μ-H)(κ2,μ-S2CH2)2] (1), a classical [B2H5]− ion stabilized by the binuclear tantalum template. Theoretical studies and bonding analysis established that the unusual stability of [B2H5]− in 1 is mainly due to the stabilization of sp2-B center by electron donation from tantalum. Reactions to replace the hydrogens attached to the diborane moiety in 1 with a 2 e {M(CO)4} fragment (M=Mo or W) resulted in simple adducts, [{(Cp*Ta)(CH2S2)}2(B2H5)(H){M(CO)3}] (6: M=Mo and 7: M=W), that retained the diborane(5) unit. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
About the journal
JournalData powered by TypesetAngewandte Chemie - International Edition
PublisherData powered by TypesetWiley-VCH Verlag
ISSN14337851
Open AccessYes
Concepts (11)
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    Boron compounds
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    Carbonylation
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    Lithium compounds
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    Tantalum
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    Bonding analysis
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    DIBORANE
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    DITHIOLATES
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    ELECTRON DONATION
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    Metal carbonyl
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    Theoretical study
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    Stabilization