Stabilization of Classical B2H5](-): Structure and Bonding of (Cp*Ta)(2)(B2H5)(mu-H)L-2] (Cp*=eta(5)-C5Me5; L=SCH2S)

Saha, Koushik and Ghorai, Sagar and Kar, Sourav and Saha, Suvam and Halder, Rajarshi and Raghavendra, Dr Beesam and Jemmis, Eluvathingal D and Ghosh, Sundargopal (2019) Stabilization of Classical B2H5](-): Structure and Bonding of (Cp*Ta)(2)(B2H5)(mu-H)L-2] (Cp*=eta(5)-C5Me5; L=SCH2S). In: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION .

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Abstract

The room-temperature reaction of Cp*TaCl4] with LiBH4.THF followed by addition of S2CPPh3 results in pentahydridodiborate species (Cp*Ta)(2)(mu,eta(2):eta(2)-B2H5)(mu-H)(kappa(2),mu-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 sp(2)-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.

Item Type:	Journal Article
Publication:	ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Publisher:	WILEY-V C H VERLAG GMBH
Additional Information:	copyright of this article belongs to WILEY-V C H VERLAG GMBH
Keywords:	CS2 activation; diborane(5); dithiolates; metal carbonyls; tantalum
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	02 Jan 2020 07:58
Last Modified:	02 Jan 2020 07:58
URI:	http://eprints.iisc.ac.in/id/eprint/63967

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