Skip to Main content Skip to Navigation
Journal articles

Heterometallic Triply-Bridging Bis-Borylene Complexes

Abstract : Triply-bridging bis-{hydrido(borylene)} and bis-borylene species of groups 6, 8 and 9 transition metals are reported. Mild thermolysis of [Fe-2(CO)(9)] with an in situ produced intermediate, generated from the low-temperature reaction of [Cp*WCl4] (Cp*=eta(5)-C5Me5) and [LiBH4.THF] afforded triply-bridging bis-{hydrido(borylene)}, [(mu(3)-BH)(2)H-2{Cp*W(CO)(2)}(2){Fe(CO)(2)}] (1) and bis-borylene, [(mu(3)-BH)(2){Cp*W(CO)(2)}(2){Fe(CO)(3)}] (2). The chemical bonding analyses of 1 show that the B-H interactions in bis-{hydrido (borylene)} species is stronger as compared to the M-H ones. Frontier molecular orbital analysis shows a significantly larger energy gap between the HOMO-LUMO for 2 as compared to 1. In an attempt to synthesize the ruthenium analogue of 1, a similar reaction has been performed with [Ru-3(CO)(12)]. Although we failed to get the bis-{hydrido(borylene)} species, the reaction afforded triply-bridging bis-borylene species [(mu(3)-BH)(2){WCp*(CO)(2)}(2){Ru(CO)(3)}] (2 '), an analogue of 2. In search for the isolation of bridging bis-borylene species of Rh, we have treated [Co-2(CO)(8)] with nido-[(RhCp*)(2)(B3H7)], which afforded triply-bridging bis-borylene species [(mu(3)-BH)(2)(RhCp*)(2)Co-2(CO)(4)(mu-CO)] (3). All the compounds have been characterized by means of single-crystal X-ray diffraction study; H-1, B-11, C-13 NMR spectroscopy; IR spectroscopy and mass spectrometry.
Document type :
Journal articles
Complete list of metadatas

Cited literature [55 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-02531303
Contributor : Laurent Jonchère <>
Submitted on : Thursday, April 9, 2020 - 12:40:33 PM
Last modification on : Tuesday, April 14, 2020 - 8:41:07 AM

File

Bag et al-2020-Heterometallic ...
Files produced by the author(s)

Identifiers

Citation

Ranjit Bag, Sourav Kar, Suvam Saha, Suman Gomosta, Beesam Raghavendra, et al.. Heterometallic Triply-Bridging Bis-Borylene Complexes. Chemistry - An Asian Journal, Wiley-VCH Verlag, 2020, 15 (9), pp.780-786. ⟨10.1002/asia.201901593⟩. ⟨hal-02531303⟩

Share

Metrics

Record views

32

Files downloads

33