Reaction of PhC(X)(COH) (X = OH, NH) with [VO(OR)] (R = Et, Pr): structure, magnetic susceptibility and ROP capability.

Reaction of [VO(OR)] (R = Et, Pr) with 2,2'-diphenylglycine afforded the alkoxide-bridged dimers {[VO(OR)(μ-OR)][PhC(NH)(CO)]}, whereas use of benzilic acid, in the presence of alkali metals, afforded 16-membered metallocycles {V(O)M(OR)[PhC(OH)(CO)]} (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.

Trinuclear zinc calix[4]arenes: synthesis, structure, and ring opening polymerization studies.

The trinuclear zinc calix[4]arene complexes [Zn(OCCH)(L(O)(OMe))·MeCN ( = 7.5, 1; = 6, 1'), [Zn(OCCH)(L(O)(OPr))·5MeCN (2·5MeCN), [Zn(OEt)(L(O)(OMe))]·4MeCN (3·4MeCN), [Zn(OEt)(L(Opentyl))]·4.5MeCN (4·4.