Synthesis, Structure, Bonding, and Reactivity of Metal Complexes Comprising Diborane(4) and Diborene(2): {Cp*Mo(CO)(2)}(2){mu-eta(2):eta(2)-B2H4}] and {Cp*M(CO)(2)}(2)B2H2M(CO)(4)], M=Mo,W

Mondal, Bijan and Bag, Ranjit and Ghorai, Sagar and Bakthavachalam, K and Jemmis, Eluvathingal D and Ghosh, Sundargopal (2018) Synthesis, Structure, Bonding, and Reactivity of Metal Complexes Comprising Diborane(4) and Diborene(2): {Cp*Mo(CO)(2)}(2){mu-eta(2):eta(2)-B2H4}] and {Cp*M(CO)(2)}(2)B2H2M(CO)(4)], M=Mo,W. In: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 (27). pp. 8079-8083.

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Abstract

The reaction of (Cp*Mo)(2)(mu-Cl)(2)B2H6] (1) with CO at room temperature led to the formation of the highly fluxional species {Cp*Mo(CO)(2)}(2){mu-eta(2):eta(2)-B2H4}] (2). Compound 2, to the best of our knowledge, is the first example of a bimetallic diborane(4) conforming to a singly bridged C-s structure. Theoretical studies show that 2 mimics the Cotton dimolybdenum-alkyne complex {CpMo(CO)(2)}(2)C2H2]. In an attempt to replace two hydrogen atoms of diborane(4) in 2 with a 2e W(CO)(4)] fragment, {Cp*Mo(CO)(2)}(2) B2H2W(CO)(4)] (3) was isolated upon treatment with W(CO)(5).thf]. Compound 3 shows the intriguing presence of B2H2] with a short B-B length of 1.624(4) angstrom. We isolated the tungsten analogues of 3, {Cp*W(CO)(2)}(2)B2H2W(CO)(4)] (4) and {Cp*W(CO)(2)}(2)B2H2Mo(CO)(4)] (5), which provided direct proof of the existence of the tungsten analogue of 2.

Item Type:	Journal Article
Publication:	ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Publisher:	WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Additional Information:	Copyright of this article belong to WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	18 Jul 2018 15:41
Last Modified:	18 Jul 2018 15:41
URI:	http://eprints.iisc.ac.in/id/eprint/60232

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