Vanadium(V/IV) Oxido Complexes: Potential as Bases in Frustrated Lewis Pairs
Year: 2024
Type: article
Abstract: Frustrated Lewis Pairs (FLP) have found exciting access in catalysis and small molecule activation. Here, we describe the potential of two vanadium(V) oxido complexes with monoanionic bidentate N,O donors, [VOCl(LCF3)2] (1 a), [VOCl(LH)2] (1 b) as bases in FLPs. Upon reaction of 1 a with the Lewis acid B(C6F5)3 the FLP [VOCl(LCF3)2]/B(C6F5)3 (1 a/B(C6F5)3) was observed. Addition of Ph3SiH led to the reduction of VV to VIV under formation of the adduct [V{OB(C6F5)3}(LCF3)2] (2 a) while FLP reactivity was not observed. Dissolving 2 a in CH3CN leads to the VIV oxido complex, [VO(LCF3)2] (3 a). In contrast, when 1 b was reacted with B(C6F5)3, a VIV oxido complex [VO(LH)2] (3 b) was obtained. Upon addition of B(C6F5)3 to 3 b no reaction leading to the expected adduct such as 2 a could be observed. Only few crystals deriving from a disproportion reaction could be identified as an adduct dimer [V{OB(C6F5)3}LH(μ‐O)]2. While FLP reactivity could not be found yet with the described systems, the redox labile nature and versatility of the metal complexes are demonstrated.
Institution: University of Graz
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,860
OpenAlex ID: W4401814845