Contrasting reactivity of B–Cl and B–H bonds at [Ni(IMes)2] to form unsupported Ni-boryls†
Gabrielle
Audsley, 
a
Ambre
Carpentier,
b
James
Wright,
a
Thomas M.
Roseveare,
d
Ewan R.
Clark,
e
Stuart A.
Macgregor
*b
and
Ian M.
Riddlestone
*a
a
Ambre
Carpentier,
b
James
Wright,
a
Thomas M.
Roseveare,
d
Ewan R.
Clark,
e
Stuart A.
Macgregor
*b
and
Ian M.
Riddlestone
*a
Abstract
[Ni(IMes)2] reacts with chloroboranes via oxidative addition to form rare unsupported Ni-boryls. In contrast, the oxidative addition of hydridoboranes is not observed and products from competing reaction pathways are identified. Computational studies relate these differences to the mechanism of oxidative addition: B–Cl activation proceeds via nucleophilic displacement of Cl−, while B–H activation would entail high energy concerted bond cleavage.
![Graphical abstract: Contrasting reactivity of B–Cl and B–H bonds at [Ni(IMes)2] to form unsupported Ni-boryls](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D3CC05369E&imageInfo.ImageIdentifier.Year=2024)
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