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- Title
Stabilization of Classical [B<sub>2</sub>H<sub>5</sub>]<sup>−</sup>: Structure and Bonding of [(Cp*Ta)<sub>2</sub>(B<sub>2</sub>H<sub>5</sub>)(μ‐H)L<sub>2</sub>] (Cp*=η<sup>5</sup>‐C<sub>5</sub>Me<sub>5</sub>; L=SCH<sub>2</sub>S)
- Authors
Saha, Koushik; Ghorai, Sagar; Kar, Sourav; Saha, Suvam; Halder, Rajarshi; Raghavendra, Beesam; Jemmis, Eluvathingal D.; Ghosh, Sundargopal
- 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.
- Subjects
TANTALUM; CHEMICAL adducts; ELECTRONS; HYDROGEN; IONS; SPECIES
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 49, p17848
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201911480