Reaction of Ph2C(X)(CO2H) (X = OH, NH2) with [VO(OR)3] (R = Et, n Pr): structure, magnetic susceptibility and ROP capability

Mollie A Glenister; Josef W A Frese; Mark R J Elsegood; Angelos B Canaj; Euan K Brechin; Carl Redshaw

doi:10.1039/d4dt00078a

Reaction of Ph₂C(X)(CO₂H) (X = OH, NH₂) with [VO(OR)₃] (R = Et, n Pr): structure, magnetic susceptibility and ROP capability

Dalton Trans. 2024 Mar 19;53(12):5351-5355. doi: 10.1039/d4dt00078a.

Authors

Mollie A Glenister¹, Josef W A Frese¹, Mark R J Elsegood¹, Angelos B Canaj², Euan K Brechin², Carl Redshaw³

Affiliations

¹ Plastics Collaboratory, Chemistry, School of Natural Sciences, University of Hull, Cottingham Road, Hull, HU6 7RX, UK. c.redshaw@hull.ac.uk.
² EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK.
³ Chemistry Department, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK.

PMID: 38444301
DOI: 10.1039/d4dt00078a

Abstract

Reaction of [VO(OR)₃] (R = Et, nPr) with 2,2'-diphenylglycine afforded the alkoxide-bridged dimers {[VO(OR)(μ-OR)][Ph₂C(NH₂)(CO₂)]}₂, whereas use of benzilic acid, in the presence of alkali metals, afforded 16-membered metallocycles {V₈(O)₄M(OR)₈[Ph₂C(OH)(CO₂)]₁₂} (M = <1 Na, K). For the ring systems, magnetic susceptibility data is consistent with mixed-valence vanadium with an average oxidation state of 3.5. The dimer and ring systems are capable of the ring opening polymerisation (ROP) of ε-caprolactone under N₂, air, or as melts affording mostly low to medium molecular weight cyclic and linear products.